CN107105152A - Zoom control equipment, picture pick-up device and Zoom control method - Google Patents

Abstract

The present invention relates to a kind of Zoom control equipment, picture pick-up device and Zoom control method.The Zoom control equipment is used to control visual angle.The Zoom control equipment includes：Move acquisition unit (101), the amount of exercise for obtaining imaging optical system；Calculating part (116), the displacement of the main subject image in shooting image is calculated for the amount of exercise by using the imaging optical system；Judging part (117), for judging whether the displacement of the main subject image is more than first threshold；And controller (118), in the case of being more than the first threshold in the displacement of the main subject image, the controller is carried out for making the visual angle be less than the wide control in visual angle used in the situation of the first threshold than the displacement of the main subject image.

Description

Zoom control equipment, picture pick-up device and Zoom control method

Technical field

The present invention relates to Zoom control technology.

Background technology

Picture pick-up device is included equipped with making the optical zoom function, the part of bust shot image that zoom lens move The picture pick-up device of both electronic zoom function or optical zoom function and electronic zoom function.Not only for specialty use And this picture pick-up device used for consumer has high zoom multiplying power recently.This high zoom times is used in rawness user The picture pick-up device of rate come in the case of carrying out remote burnt shooting, the user be difficult to photograph subject and be often likely to result in by Take the photograph body moment and leave picture.Japanese Unexamined Patent Publication 2015-102853 discloses following picture pick-up device (camera), and the wherein shooting is set Standby (camera) is used for the amount of exercise for detecting camera, and is being judged as that user is operated to camera to search for subject In the case of, reduced automatically towards wide-angle side.Reduced (logical by the motion in response to camera by this below Crossing makes camera angle broaden) come aid in the zoom ancillary control function found a view of user be referred to as " find a view auxiliary zoom function (or letter It is referred to as auxiliary zoom of finding a view) " and be abbreviated as " FA zoom functions (or referred to as FA zooms) ".Shooting is regarded from by FA zooms The amplification (that is, making zoom position be back to home position) that the deflated state that angle broadens rises is also included within FA zooms.

The content of the invention

The present invention provides a kind of Zoom control equipment for being used to control visual angle as its aspect.The Zoom control equipment bag Include：Move acquisition unit, the amount of exercise for obtaining imaging optical system used in the shooting of main subject；Calculating part, is used for The displacement of the main subject image in captured image is calculated by using the amount of exercise of the imaging optical system；Sentence Disconnected portion, for judging whether the displacement of the main subject image is more than first threshold；And controller, it is described for changing Visual angle, it is characterised in that in the case where the displacement of the main subject image is more than the first threshold, the controller It is controlled such that the visual angle is used in the case of being less than the first threshold than the displacement of the main subject image Visual angle it is wide.

The present invention provides a kind of Zoom control equipment for being used to control visual angle as its another aspect.The Zoom control is set It is standby to include：Move acquisition unit, the amount of exercise for obtaining imaging optical system；And controller, for changing the visual angle, its It is characterised by, the controller carries out following operate：(a) speed or acceleration as the value relevant with the amount of exercise are obtained It is used as the first value；(b) become equal to from first value or at the time of higher than three threshold values obtain and the camera optical The value that the amount of movement of the motion of system is relevant is used as second value；And (c) becomes equal to or is more than in response to the second value 4th threshold value, makes the visual angle broaden.

The present invention provides a kind of picture pick-up device and is used as its another aspect.The picture pick-up device includes：Above-mentioned Zoom control Equipment；And imaging sensor, for being imaged by the visual angle.

The present invention provides a kind of Zoom control method for being used to control visual angle as its further aspect.The Zoom control side Method includes：The step of for obtaining the amount of exercise of imaging optical system used in the shooting of main subject；For by using The step of displacement of the amount of exercise of the imaging optical system to calculate the main subject image in captured image；And For the step of whether displacement of the main subject image is more than first threshold to be judged, it is characterised in that the zoom control Method processed also includes：For the displacement of the main subject image be more than the first threshold in the case of be controlled with Make the visual angle wider less than used visual angle in the case of the first threshold than the displacement of the main subject image Step.

By the explanation of following (refer to the attached drawing) to exemplary embodiments, further feature of the invention will be apparent.

Brief description of the drawings

Fig. 1 is the block diagram of the structure for the picture pick-up device for being shown as embodiments of the invention 1.

Fig. 2A~2C schematically shows FA zooms.

Fig. 3 is the flow chart for the subject displacement calculation processing that the displacement calculation portion in embodiment 1 that shows is carried out.

Fig. 4 A and 4B show the subject displacement calculation processing in embodiment 1.

Fig. 5 shows the subject displacement calculation processing during image blur correcting in embodiment 1.

Fig. 6 A~6C shows the subject displacement calculation processing of the use motion vector in embodiment 1.

Fig. 7 A and 7B show motion vector detection processing and histogram calculation processing in embodiment 1.

Fig. 8 A~8C shows the subject displacement calculation carried out when electronic zoom the is effective processing in embodiment 1.

Fig. 9 is the block diagram of the structure for the picture pick-up device for being shown as embodiments of the invention 2.

Figure 10 A and 10B show the threshold calculations carried out when electronic zoom the is effective processing in embodiment 2.

Figure 11 is the block diagram of the structure for the picture pick-up device for being shown as embodiments of the invention 3.

Figure 12 shows the change of the angular speed and moment of momentum in comparative example.

Figure 13 A and 13B show the change of the angular speed and moment of momentum in embodiment 3.

Figure 14 is the flow chart for showing the processing in embodiment 3.

Figure 15 shows the method for being used to calculate a reference value of moment of momentum in the variation of embodiment 3.

Embodiment

Illustrate the exemplary embodiments of the present invention below with reference to accompanying drawing.

Embodiments described below is related to the zoom for being configured to respond to the motion of picture pick-up device to be reduced Control device.

The Zoom control equipment of each embodiment is provided for the condition reduced in detail, enables to according to user Intention carry out Zoom control.First embodiment (embodiment 1) and second embodiment (embodiment 2) will illustrate to include following change The picture pick-up device of burnt control device, wherein the Zoom control equipment are configured as the position based on the subject image in shooting image Shifting amount is reduced.3rd embodiment (embodiment 3) will illustrate to include the picture pick-up device of following Zoom control equipment, wherein should Zoom control equipment is configured to respond to the big motion of picture pick-up device to be reduced.

Embodiment 1

As described above, the present embodiment will illustrate to include the picture pick-up device of following Zoom control equipment, the wherein Zoom control Equipment is configured as the displacement based on the subject image in shooting image to be reduced.Japanese Unexamined Patent Publication 2015-102853 The displacement that disclosed FA zoom functions are difficult to the subject image in the amount of exercise and shooting image of picture pick-up device differs Suitably judge whether to reduce in the case of cause.It is therefore possible to be reduced at the expectation moment of user.Example Such as, during electronic zoom, due to the small motion relative to picture pick-up device, the subject image in shooting image (is led shot Body image) displacement it is big, therefore user may lose subject (the main subject to be shot).Therefore, it is desirable to carry out electricity During sub- zoom, compared with when without electronic zoom, it is easier to which ground starts FA zooms.On the other hand, because user can phase It is shot to easily shooting the motion subject moved by fixed speed along fixed-direction, therefore this being photographed well in user In the case of body, motion of the displacement relative to picture pick-up device of the subject image in shooting image will not be excessive.That is, although The amount of exercise of picture pick-up device is big, but the subject image in shooting image displacement it is small in the case of, it is expected that FA zooms do not have There is startup.Thus, the displacement of subject image of the present embodiment in shooting image judges whether to reduce, so that It is easy to carry out Zoom control according to the intention of user.The present embodiment will be explained in detail the picture pick-up device including Zoom control equipment Each operation for constituting part and these composition parts.

Fig. 1 shows the structure of the picture pick-up device 100 with FA zoom functions.Picture pick-up device 100 is equipped with correction due to hand Image blurring image blur correcting function caused by shake etc..Picture pick-up device 100 by using with order to which correction chart is as mould The relevant information of shake of the picture pick-up device pasted and detected calculates the amount of exercise of picture pick-up device 100.In the present embodiment, to the greatest extent Pipe FA zoom functions and image blur correcting function are shared for detecting the jitter detector of shake, but can set FA zoom work( The special motion amount detector of energy.Therefore, it is possible to realize FA zoom functions in the case of without image blur correcting function.

Before explanation FA zoom functions, image blur correcting function will be illustrated.It is used as the shake sensing of motion acquisition unit Device 101 is configured as the shake that detection puts on picture pick-up device 100 (that is, putting on its imaging optical system).Jitter sensor 101 angular-rate sensor including vibratory gyroscope etc., and be configured as detection as with yaw direction and pitching side The angular speed (movement velocity) of the first relevant value of upward motion.Jitter sensor 101 is by the angular speed detected by expression Shaking detection signal output to microcomputer (μ COM) 102.Microcomputer 102 obtains the shaking detection signal with to the shake Detect that signal carries out signal transacting.Fig. 1 shows the processing that microcomputer 102 is carried out in form of a block diagram.In microcomputer 102 Yaw direction and pitch orientation detected by 103 pairs of ambiguity correction amount calculating part each on angular speed be integrated to calculate Yaw direction and pitch orientation each on moment of momentum, and according to yaw direction and pitch orientation each on moment of momentum To obtain ambiguity correction amount.

Ambiguity correction amount is relative to offset the image blurring drive volume in shooting image with ambiguity correction mechanism 108 Should.Specifically, ambiguity correction amount calculating part 103 includes integrator, and the wherein integrator is used for as from jitter sensor 101 The angular velocity signal of the shaking detection signal of output is integrated to export angular move-ment signals to subtracter 104.The integrator Angular velocity signal in yaw direction and pitch orientation is integrated, and the thus angle in output yaw direction and pitch orientation Motor message.Subtracter 104 subtracts as described below obscure in the angular move-ment signals exported from ambiguity correction amount calculating part 103 Then the position data of aligning gear 108 is exported the deviation data to control wave filter 105 with obtaining deviation data.Control 105 pairs of deviation datas got from subtracter 104 of wave filter are carried out at the signal using amplifier and phase compensation filter Reason.

Control wave filter 105 expression is handled after deviation data signal output to shift lens controller 106.Displacement Lens controller 106 controls motor 107 in response to the output from control wave filter 105, to control ambiguity correction mechanism 108 In shift lens (ambiguity correction lens) driving.Specifically, motor control amount is modulated to use by shift lens controller 106 In PWM (pulse width modulation) waveform for making the dutycycle of pulse signal change, with drive motor 107.Motor 107 is for example It is voice coil motor.The driving of motor 107 makes the shift lens edge direction different from optical axis direction in ambiguity correction mechanism 108 (for example, direction vertical with the optical axis of imaging optical system) is mobile.Shift lens controller 106 carries out feedback control so that The movement (displacement) of shift lens makes the deviation data from subtracter 104 be reduced to 0.

This example demonstrates that including the ambiguity correction mechanism along the direction moveable shift lens different from optical axis direction 108 are used as example.In Fig. 1, ambiguity correction mechanism 108 and imaging sensor 110 are separated from each other.However, in alternate embodiment In, ambiguity correction mechanism 108 can have imaging sensor to be kept by mobile unit and along the direction different from optical axis direction Moveable structure.In this case, including the mobile control of mobile unit of imaging sensor 110 allows for figure As ambiguity correction.Ambiguity correction mechanism 108 can carry out electronic image ambiguity correction (electronic image stabilization).Electronic image is obscured Correction changes the position for cutting out region in the shooting image accessed by imaging sensor 110, to carry out image blur correcting.

Shift position sensor 109 includes magnet and is configured to the Magnetic sensing component (Hall element) towards magnet. The shift amount of shift lens in the detection ambiguity correction of shift position sensor 109 mechanism 108 is (that is, vertical with optical axis direction Amount of movement on direction), detect signal output to subtracter 104 shift amount.

The structure is constituted makes shift lens be hung down with optical axis direction for the output from ambiguity correction amount calculating part 103 Straight square upward displacement is to follow the feedback control system of target location.Using the feedback control system, shift lens are displaced The shift amount corresponding with ambiguity correction amount is image blurring caused by the shake of picture pick-up device 100 to correct.In image In the imaging surface of sensor 110, formed to yaw (horizontal) direction and pitching (vertical) direction each on fuzzy carried out school Positive subject image.110 pairs of imaging sensor includes the imaging optical system of ambiguity correction mechanism 108 and zoom lens 120 The subject image (optical imagery) formed carries out opto-electronic conversion to export image pickup signal (picture signal).

Imaging optical system can be provided integrally in the one-piece type picture pick-up device of camera lens and can be replaceably mounted To camera lens exchangeable picture pick-up device.111 pairs of signal processor is at the image pickup signal progress that imaging sensor 110 is got Reason.Signal processor 111, which is produced, meets NTSC (National Television System Committee, national television system The system committee) vision signal (two field picture) so that the vision signal is exported to video memory 112 and motion vector detection 125.Signal processor 111 can carry out such as CDS (correlated-double-sampling), AGC to the image pickup signal from imaging sensor 110 The various processing of (automatic growth control), A/D conversion, Gamma correction and white balance etc..

Memory read-out controller 113 sets read-out position and the reading of the view data stored in video memory 112 Go out region.For example, memory read-out controller 113 sets the big or small read-out area of view data when carrying out electronic zoom Domain.The record for the data that the control of recording controller 114 is read using memory read-out controller 113 from video memory 112.Note Record controller 114 operates to control from image in response to the instruction for recording vision signal of the user in operating unit 130 Memory 112 read record from data to recording medium 115.Recording medium 115 is, for example, the half of flash memory etc. The magnetic recording medium of conductive medium or hard disk etc..

Then, FA zoom functions will be illustrated.Zoom control equipment in the present embodiment includes jitter sensor 101 and micro- meter Calculation machine 102.

In the present embodiment, except above-mentioned ambiguity correction amount calculating part 103, subtracter 104, control wave filter 105 and shifting Position lens controller 106 outside, microcomputer 102 also include as calculating part subject displacement calculation portion 116, be used as judgement The subject in portion shoots judging part 117, zoom controller 118 and electronic zoom controller 122 as controller.

Jitter sensor 101 detects the shake of picture pick-up device 100 to export shaking detection signal (angular velocity signal) extremely Subject displacement calculation portion (hereinafter referred to as " displacement calculation portion ") 116.As described later in detail, displacement calculation portion 116 calculate the displacement of subject image.Subject shoots judging part (hereinafter referred to as " shooting judging part ") 117 from displacement Calculating part 116 obtains the displacement of subject image and is compared accessed displacement and first threshold.Use The first threshold come judge whether to reduce.Shoot whether judging part 117 is more than first according to the displacement of subject image Threshold value judges subject shooting state.Subject shooting state is to represent that user just shoots subject via picture pick-up device 100 (in other words, picture pick-up device 100 just shoots subject) or user are just searching for the state of the judged result of subject.Displacement The displacement for the subject image that calculating part 116 is calculated for example is represented in units of pixel on imaging sensor 110 The value of the change in location of subject image.First threshold is the limiting value for imaging resolution ratio.Zoom controller 118 judges from shooting Portion 117 obtains judged result and exported with will zoom in or out drive signal used to zoom motor 119.Specifically, in shooting Equipment 100 is in deflated state and inputs the judged result that picture pick-up device 100 is just shooting subject from judging part 117 is shot In the case of, zoom controller 118 exports the drive signal used in amplification to zoom motor 119.On the other hand, set in shooting Standby 100 are just searching for the judgement knot of subject in magnifying state (FA zooms are invalid) and from the shooting input user of judging part 117 In the case of fruit, zoom controller 118 exports the drive signal used in diminution to zoom motor 119.

Deflated state is in picture pick-up device 100 and is just searching for sentencing for subject from the input user of judging part 117 is shot In the case of disconnected result, camera angle does not change.Equally, it is in magnifying state in picture pick-up device 100 and judges from shooting In the case that the input of portion 117 picture pick-up device 100 is just shooting the judged result of subject, camera angle does not change.

Zoom motor 119 is for example including stepper motor.The rotor of zoom motor 119 rotates driving screw, and thus zoom is saturating Mirror 120 is moved in the direction of the optical axis.Zoom controller 118, which produces (calculating), to be included making zoom lens 120 be moved to target location The drive signal of required umber of pulse, and the drive signal is supplied to zoom motor 119.Zoom controller 118 can be by Drive signal is supplied to zoom motor 119, the zoom position sensor of the position until being configured as detecting zoom lens 120 Untill 121 detect the arrival of zoom lens 120 target location.

In the following description, the diminution that FA zoom functions are carried out will be started by zoom controller 118 and is referred to as that " FA contracts It is small " (reduce control), and will be referred to as in order to which the deflated state after being reduced from FA is back to the amplification that the state of dolly-out,ing dolly-back carried out " FA amplifications " (amplification control).In the present embodiment, FA is carried out to reduce as in response to from the judgement knot for shooting judging part 117 The diminution of fruit.

Zoom lens 120 are by being fixed with the holding of the position scale (not shown) of the position for detecting zoom lens 120 Frame is kept.Lens barrel portion (not shown) is equipped with the zoom position sensor 121 fixed in the way of facing position scale.Position Put the scale pattern that scale includes being formed along optical axis direction.Scale pattern is magnetic pattern or optical reflection pattern.Zoom position Sensor 121 reads the scale pattern moved together with zoom lens 120 in magnetical or optical mode, and zoom is represented to export The position detection signal of the position of lens 120.Position detection signal from zoom position sensor 121 is inputted to zoom control Device 118 processed, for carrying out the position control of zoom lens 120.Shift position sensor 109 also supplies shift amount detection signal To displacement calculation portion 116.In Fig. 1, utilizeThe terminal 123 and 124 being shown respectively is electrically connected to each other.

Shift lens controller 106 controls the displacement of shift lens for the motion of picture pick-up device 100, to reduce image Move (image blurring).By subtracting and shifting from the amount of movement of the camera watch region associated with the motion of picture pick-up device 100 The amount of movement of the associated camera watch region of the displacements of lens calculates the displacement of subject image.

Picture pick-up device 100 can carry out electronic zoom (that is, with electronic zoom function).Electronic zoom controller 122 is controlled The electronic zoom that system is carried out by image procossing, in other words carries out electronic zoom control.It is effective in electronic zoom function In the case of, zoom controller 118 calculates electronic zoom multiplying power to export the result of calculation to electronic zoom controller 122.Electricity Sub- zoom controller 122 indicates that image reads region according to electronic zoom multiplying power to memory read-out controller 113.Electronic zoom Controller 122 also exports electronic zoom multiplying power to displacement calculation portion 116.Electronic zoom control is carried out to shooting image In with image read region it is corresponding cut out the processing that region is shifted.The figure of (reading) is being cut out by the processing In the case of as the amplification in display, for the same movement of picture pick-up device 100, invalid situation phase is controlled with electronic zoom Than the displacement quantitative change of the subject image in shooting image is big.Thus, displacement calculation portion 116 is by using electronic zoom times Rate corrects the amount of movement of the camera watch region associated with the motion of picture pick-up device, and calculates the displacement after correction as quilt The displacement of subject image.It will be described below the correction using electronic zoom multiplying power.

User can select the effective and invalid of electronic zoom function via menu setting in display picture etc..

In current frame image and video memory 112 produced by the acquisition signal processor 111 of motion vector detection 125 The previous frame image stored, and detect that the motion between these two field pictures is sweared using the luminance signal of these two field pictures Amount.For example, motion vector can be detected by using block matching method.Block matching method is by current frame image and former frame figure Detected as being each divided into the multiple regions for being referred to as " block ", and in units of block in current frame image and previous frame image Similar portion.This method detects the correlation maximum with any block in current frame image in the arbitrary region of previous system of battle formations picture Similar block.This method always according to the similar block in the position and previous frame image of any block in current frame image position it Between displacement, detect as the movable information between two field picture motion vector.Motion vector detection 125 can be used and removed Other motion vector detecting methods beyond block matching method.

Motion vector detection 125 exports detected motion vector to displacement calculation portion 116.In Fig. 1, it is sharp WithThe B terminals 126 and 127 being shown respectively are electrically connected to each other.Under FA zooms effectively shooting state, subject image Displacement increase can automatic start reduce.On the other hand, in the case where user selects the invalid shooting state of FA zooms, The no automatic start of this increase of the displacement of subject image reduces.Behaviour that can be by user in operating unit 130 Make to select the effective and invalid of FA zooms.Operating unit 130 includes Operation switch, operation button, touch panel and other etc., And receive such as menu setting operation, zoom key operation, moving image capture starts operation and rest image shoots and indicates behaviour The operation of the user of work etc..Operating unit 130 also receives the operation for being used to stop FA diminutions of user.As user for stopping The operation only reduced, can use and amplification and the zoom key operation reduced are indicated when FA zoom functions are invalid.

Reference Fig. 2A~2C is illustrated into the example of FA zooms.Fig. 2A shows that user makes picture pick-up device 100 in figure from a left side Move right using the state for shooting the ball 201 as mobile main subject.Picture pick-up device 100 not only just shoots ball 201, but also It is positive to shoot subject 202 and 203.In fig. 2, ball 201 is moved, and shows to work as forecourt 201a, and profit using black circles Ball 201b is shown over shaded circles.Fig. 2 B show the shooting image got in the state of shown in Fig. 2A.Fig. 2 C are shown The time change of the displacement of subject image.

T1, t2 and t3 have " t1 at the time of shown in Fig. 2 B and 2C<t2<T3 " relation.

Before time tl, user is almost without dollying equipment 100, and thus the displacement of subject image is about 0. In the case where moment t1 throws ball 201, user's dollying equipment 100 is to shoot ball 201, and thus displacement starts increase.

Then, in moment t2, the displacement of subject image exceedes the judgment threshold as first threshold.The judgment threshold There is following relation with the displacement of subject image：As shown in Figure 2 B, picture pick-up device 100 be possible to photograph towards In the case of the outside mobile mobile main subject of camera angle, displacement exceedes judgment threshold.In the position of subject image Shifting amount becomes to be equal to or more than t2 at the time of judgment threshold, shoots judging part 117 and is judged as that current state is that user just searches for master The search condition of subject.Zoom controller 118 is reduced in response to the judged result, thus after the time t 2 when T3 is carved, camera angle is changed into wide-angle.This increase of camera angle causes the motion relative to picture pick-up device 100, main subject Displacement diminish, the thus motion of picture pick-up device 100 diminishes.Therefore, as shown in Figure 2 C, the position of subject after the time t 2 Shifting amount reaches after its peak value that the displacement of subject image is gradually reduced.

The subject that displacement calculation portion 116 is carried out will be described in detail by reference to Fig. 3 flow chart and Fig. 4~8 Displacement calculation processing.Included displacement calculation portion 116 is according to the subject as computer program in microcomputer 102 Displacement calculation program carries out the processing.In Fig. 3 and following explanation, step is abbreviated as S.In Fig. 3 S100, displacement Amount calculating part 116 calculates the displacement of subject image according to the amount of exercise of picture pick-up device 100 and calculated with temporarily storing Displacement.Fig. 4 A, 4B and 5 show specific example.

Fig. 4 A are schematically shown in the state of the optical axis X of picture pick-up device 100 (imaging optical system) is consistent with trunnion axis H Camera angle θ, camera watch region d0 and subject 202 between relation.Fig. 4 A, 4B and 5 schematically show and utilize single lens 201 imaging optical system.Camera watch region d0 is corresponding with the longitudinal region of shooting image.Jitter sensor 101 is detected To angular speed be integrated to be converted into moment of momentum (hereinafter referred to as " shake angle ").

Shake angle can be by accessed by integration at the time of FA zoom functions become effective, and can be with It is integrated sequentially to update by (for example, 1 second) on schedule interval.Represent to be detected according to jitter sensor 101 using α To the shake angle that is converted to of angular speed, the current focus of imaging optical system is represented using f, and represent shot using d The displacement of body image.Fig. 4 B schematically show the subject image in the state of picture pick-up device 100 has shaken angle α Displacement d.The optical axis X of picture pick-up device 100 has tilted shake angle α relative to trunnion axis H.In this state, subject image Displacement d and (shown in Fig. 4 A) picture pick-up device shake before subject image position P0 and (shown in Fig. 4 B) Picture pick-up device shake after subject image position P1 between it is poor corresponding.

Displacement d is calculated by using following expression formula (1)：

D=f × tan α (1)

Wherein, tan α are the tans for shaking angle α.

The displacement of shift lens in ambiguity correction mechanism 108 reduces the displacement of the subject image in shooting image, So that relative to the shake of picture pick-up device 100, the displacement of the subject image in shooting image is small.

Fig. 5 schematically show by the displacement of the shift lens in ambiguity correction mechanism 108 provided (in units of angle ) the displacement d* of correcting value β and the subject image corresponding with correcting value β.The displacement d* of subject image and (figure Shown in 4B) picture pick-up device shake after subject image position P1 and (shown in Fig. 5) by sending out lens 210 Raw displacement and correct poor corresponding between the position P2 of fuzzy subject image.By using following expression formula (2) To calculate displacement d*：

D*=f × tan (alpha-beta) (2).

In the case where representing the length corresponding with a pixel using u (unit is, for example, mm/ pixels), by subject The displacement d* divided by u of image is to calculate d*/u, so by long measure conversion imaging primitive unit cell.

The unit of the displacement of subject image is not limited to specific unit, but in the following description, selects pixel unit It is used as the unit and the unit of displacement of motion vector.Can be in the case of without image blur correcting to picture pick-up device 100 are configured.In this condition, correcting value β is zero.I.e., it is possible to represent the state by expression formula (2).Illustrate below Including the situation without image blur correcting.

In Fig. 3 S101, motion vector detection 125 judges whether motion vector can detect.Because FA zooms are anti- Only user expects that the main subject shot leaves the function of picture, therefore the present embodiment detection represents that the master in shooting image is shot The motion vector of the actual displacement amount of body image, to judge the motion of main subject by using the motion vector.That is, in fortune In the case of dynamic vector is detectable, judged essentially by using the motion vector, thus processing enters S102.In motion In the case that vector is undetectable, processing enters S104.Hindered in the low subject of contrast and detect correct motion vector Situation, there are in same camera watch region a large amount of mobile subjects and thus can not detect the motion vector of specific shot body Situation and a frame in picture pick-up device amount of jitter it is excessive and in the case of motion vector can not being detected, motion arrow Amount is undetectable.

Reference Fig. 6 A~6C, 7A and 7B is illustrated to the main subject motion vector computation processing conducted in S102.Figure 6A shows the motion of picture pick-up device (camera) 100 and the motion of main subject 204 (204a and 204b).Utilize reference 204a represents moment t1 main subject 204, and represents using reference 204b moment t2 main subject 204.Fig. 6 A Show that main subject 204 is moved in moment t1~moment t2 and user makes picture pick-up device to follow main subject 204 100 movements (yawings) shake angle α and the shooting shape of moment t2 position of camera are moved to from moment t1 position of camera State.Fig. 6 B show the example of moment t1 shooting image, and Fig. 6 C show the example of moment t2 shooting image.Fig. 7 A are shown Detected motion vector V01~V05 example in five detection blocks set in shooting image.

Fig. 7 B show the histogrammic example of detected motion vector.Transverse axis represents the size of motion vector, and The longitudinal axis represents the quantity (detection vector quantities) of detected motion vector.Output bag from motion vector detection 125 The motion vector of main subject 204 and the motion vector of background are included, thus motion vector detection 125 is by using shown in Fig. 7 B Histogram motion vector classified.Motion vector detection 125 uses the data of moment t1 and t2 shooting image To calculate motion vector V01~V05 in each detection block.Motion vector detection 125 is sweared always according to detected motion Amount produces the histogram shown in Fig. 7 B.Fig. 7 B show to detect the first motion vector 205 and detection vector number that vector quantities are larger Measure less second motion vector 206.Can be by size and the subject figure calculated according to the amount of exercise of picture pick-up device 100 As the much the same big motion vectors of displacement d* be judged as with caused by the motion of picture pick-up device 100 image transport The motion vector of dynamic, i.e. background is corresponding.In figure 7b, due to each larger first motion vector 205 of detection vector quantities Size close to the displacement d* of subject image, therefore the first motion vector 205 is considered as to the motion vector of background.Thus, By the way that the motion vector (the first motion vector 205) of background is removed from all motion vectors and by being transported from remaining The maximum motion vector of detection vector quantities is extracted in dynamic vector, to determine the motion vector of main subject 204.In figure 7b, The size of each the second motion vector 206 is considered as to the size of the motion vector of main subject 204.Represent detected using v Main subject 204 motion vector size.

In Fig. 3 S103, displacement calculation portion 116 utilizes the motion vector of the main subject calculated in S102 Size v replaces the displacement of subject image.That is, in the case of motion vector is detectable, displacement calculation portion 116 is utilized The motion vector of main subject updates the displacement of the subject image stored in S100.Then, the processing terminates.

On the other hand, in the case that motion vector detection 125 is judged as that motion vector is undetectable in S101, due to It can not update the displacement of main subject image using the motion vector of main subject, therefore displacement calculation portion 116 is by S100 The displacement of middle calculated subject image or the subject image after being corrected by using electronic zoom multiplying power Correction displacement is set to the final mean annual increment movement amount of subject image.Thus, in S104, displacement calculation portion 116 judges whether It is positive to carry out electronic zoom control.

If just carrying out electronic zoom control, processing enters S105.If without just carrying out electronic zoom control, position The displacement d* of the subject image calculated in S100 is set to the final mean annual increment movement of subject image by shifting amount calculating part 116 Amount.Then, the processing terminates.

In S105, displacement calculation portion 116 corrects the quilt calculated in S100 by using electronic zoom multiplying power The displacement d* of subject image.The correction is represented by following expression formula (3), wherein e represents to correct displacement.

E=d* × electronic zoom multiplying power (3)

S105 processing will be illustrated by reference to Fig. 8 A~8C.The shooting state that Fig. 8 A are shown below is as example：It is main Subject 207 is moved in moment t1~moment t2, and user moves picture pick-up device 100 to shoot main subject 207 Shake angle α (yawing) and moment t2 position of camera is moved to from moment t1 position of camera.Using d represent relative to Displacement (situation of β=0, or the feelings in β ≠ 0 of subject image in the shooting image of the amount of exercise of picture pick-up device 100 It is d* under condition).The displacement d (or d*) and moment t1 of subject image body position shot and moment t2 body position shot it Between it is poor corresponding.Fig. 8 B are shown in the example without the shooting image in the case of electronic zoom control.On the other hand, scheme 8C shows the example of the shooting image in the case where carrying out electronic zoom control.In the shooting state shown in Fig. 8 A, not In the case of carrying out electronic zoom, the displacement of the subject image in the shooting image shown in Fig. 8 B is the quilt as moment t1 The poor d taken the photograph between body position P3 and moment t2 body position P4 shot.On the other hand, the situation of electronic zoom control is being carried out Under, the electronic zoom processing used in progress image amplification or image down.Thus, as shown in Figure 8 C, in shown shooting image Subject image displacement be e.That is, it is identical relative to picture pick-up device 100 in the case where carrying out electronic zoom control The displacement of subject image in the shooting image of motion changes according to electronic zoom multiplying power.

In S105, displacement calculation portion 116 is by the subject image after being corrected by using electronic zoom multiplying power Displacement e be set to the displacement of subject image.Thus, the processing terminates.Made by the correction represented by expression formula (3) Obtain in the case of it can not get motion vector, also can be when in view of electronic zoom according to picture pick-up device 100 Amount of exercise calculates the displacement of subject image.

The present embodiment is according to the judged result of the displacement based on the subject image in shooting image come according to shooting shape State carves progress zoom auxiliary control in due course.

Embodiment 2

Then, embodiments of the invention 2 will be illustrated.Same as Example 1, the present embodiment will be illustrated that including following zoom The picture pick-up device of control device, wherein the Zoom control equipment are configured as the displacement based on the subject image in shooting image Measure to carry out Zoom control.The difference of Zoom control equipment and embodiment 1 in the present embodiment is：Microcomputer 202 Including threshold value acquisition unit 228, and subject shoots judging part 217 by using the threshold value accessed by threshold value acquisition unit 228 To judge whether just to shoot subject.

Fig. 9 shows the picture pick-up device 200 with FA zoom functions in the present embodiment.In the picture pick-up device of the present embodiment In 200, the structure with the picture pick-up device 100 of embodiment 1 is represented using with the reference identical reference in embodiment 1 Into the same or analogous constituent components of component, and eliminate the explanation for these constituent components.In the present embodiment, by master Illustrate the difference with embodiment 1.

As described above, in picture pick-up device 200, microcomputer (μ COM) 202 includes threshold value acquisition unit 228.Displacement gauge Calculation portion 216 calculates the displacement of subject image according to the output (angular velocity signal) from jitter sensor 101.Specifically Ground, from by being subtracted during accessed shake angle is integrated to the angular velocity signal from jitter sensor 101 by inciting somebody to action Ambiguity correction amount conversion in ambiguity correction mechanism 108 is at an angle of accessed value, so calculates in units of angle The displacement d2 of subject image.

Although embodiment 1 uses pixel as the displacement d* of subject image unit, the calculating in the present embodiment Method and computational methods in embodiment 1 are essentially identical.The present embodiment and the difference of embodiment 1 are, instead of by length (unit is pixel) obtains the displacement of subject image, angularly obtains the displacement of subject image.However, the present embodiment Can be with the displacement same as Example 1 that subject image is obtained by pixel, and embodiment 1 can angularly obtain subject The displacement of image.

The displacement d2 of subject image is inputted to subject and shoots judging part 217.It is (following that subject shoots judging part Referred to as " shooting judging part ") 217 fortune according to detected by the displacement d2 and motion vector detection 125 of subject image Dynamic vector judges to indicate whether the positive subject shooting state for shooting subject.By detected by motion vector detection 125 Motion vector via the input of B terminals 126 and 127 electrically connected to each other to shooting judging part 217.

It is identical with the situation of embodiment 1, for being handled using the judgement of motion vector, use the motion vector of main subject To judge subject shooting state, but threshold value acquisition unit 228 calculates threshold value using the information from zoom controller 218, This is different from embodiment 1.Threshold value accessed by threshold value acquisition unit 228 is for judging that the displacement d2 with subject image has The threshold value (judgment threshold) of the subject shooting state of pass.

Figure 10 A show in the case of electronic zoom control is effective and in the case where electronic zoom control is invalid relative to The judgment threshold of the focal length of imaging optical system is used as example.Transverse axis represents the focal length of imaging optical system, and the longitudinal axis is represented Judgment threshold.In this example, transverse axis represents focal length.However, transverse axis can represent the distance from picture pick-up device to subject.

Represent to be directed to using electronic zoom controller 222 without electronic zoom control (electronics using TH1 shown in phantom Zoom OFF (closing)) situation judgment threshold.

The TH2 that profit is shown in solid lines represents to be directed to carries out electronic zoom control (electronics change using electronic zoom controller 222 Burnt ON (unlatching)) situation judgment threshold.In the present embodiment, it is handled as follows, the wherein processing changes according to focal length Become judgment threshold so that compared with wide-angle state, start under the state of dolly-out,ing dolly-back using the smaller amount of exercise of picture pick-up device Reduce.In Figure 10 A, for identical focal length, TH2<TH1 relation is set up.Carrying out electronic zoom control (electronic zoom times In the case that 1) rate is more than, without electronic zoom control, (electronic zoom multiplying power is with the same movement amount for picture pick-up device 1) situation is compared, and the displacement of the subject image in shooting image is larger.Therefore, 1 feelings are more than in electronic zoom multiplying power Under condition, it will determine that threshold value sets to be less than and make it easy to start contracting for the judgment threshold of 1 situation for electronic zoom multiplying power It is small.Specifically, will be by will determine that threshold value TH1 divided by electronic zoom multiplying power are calculated such as by following expression formula (4) Suo Shi The value gone out is set to judgment threshold TH2.

TH2=TH1/ electronic zooms multiplying power (4)

Judgment threshold TH2 can be for being stored in threshold value acquisition unit 228 set by various electronic zoom multiplying powers In included memory, and it can be obtained by reading judgment threshold TH2 from the memory.It is alternatively possible to make Judgment threshold TH2 is calculated with the judgment threshold TH1 and electronic zoom multiplying power that are stored in memory.

In the case where carrying out electronic zoom control, exceed judgment threshold TH2 in response to the displacement d2 of subject image To start diminution.Judgment threshold TH1 and TH2 are individually the first threshold for being used to judge whether to FA diminutions.Afterwards, in response to The displacement d2 of subject image is down to shooting below threshold value TH3, starts amplification control so that focal length is back to original dolly-out, dolly-back Side focal length.

It is to be used to judge that subject image is included in shooting image, i.e. picture pick-up device is just shooting shot to shoot threshold value TH3 The threshold value of body.In the case where the displacement d2 of subject image is less than and shoots threshold value TH3, it is judged as that subject image is included in In shooting image, i.e. picture pick-up device just shoots subject.In other words, shooting threshold value TH3 is put for judging whether to FA Big threshold value.Shoot threshold value TH3 corresponding with Second Threshold.Figure 10 B show sentencing in the case where carrying out electronic zoom control Disconnected threshold value TH2 limitation.Transverse axis represents the focal length (or distance from picture pick-up device to subject) of imaging optical system, and indulges Axle represents judgment threshold.In fig. 1 ob, for identical focal length, TH3<TH2 relation is set up, and diff represent TH2 and Difference between TH3.Threshold value TH3 is shot also according to whether carrying out electronic zoom control and change.Eliminate for without electronics The explanation of the shooting threshold value of the situation of Zoom control.

Reduce judgment threshold TH2 using electronic zoom multiplying power, this reduce the poor diff with shooting threshold value TH3.Too small Poor diff causes the problems with relevant with FA zooms.Starting contracting only slight beyond judgment threshold TH2 in response to displacement d2 In the case of small, it is adjacent after this operation, displacement d2 only slightly drop to shoot below threshold value TH3 value, allow for out Begin to amplify.That is, vibration (hunting) phenomenon for reducing and amplifying continually occurs for generation, and this may cause to be difficult to see shooting Image.Thus, the present embodiment is limited judgment threshold TH2 so that although focal length changes, and poor diff will not also become Less than predetermined value (lower limit).

Predetermined value is specifically to carry out fixed point shooting with user so that the amount of exercise in the case that picture pick-up device 100 is fixed is relative The value answered.The reason for for limiting judgment threshold TH2 is to prevent displacement d2 from exceeding judgment threshold (first threshold) TH2 or being down to Shoot threshold value (Second Threshold) below TH3.

As described above, the present embodiment carries out the processing to change the judgment threshold for judging subject shooting state, And make it possible to subject image in shooting image displacement and change after judgment threshold between comparison knot Fruit controls to carry out zoom auxiliary.Although the present embodiment controls to change judgment threshold according to whether carrying out electronic zoom, can With by using shoot judging part 217 correct main subject motion vector multiplying power v then by the multiplying power after correction and judgement Threshold value is compared to provide identical effect.Although in addition, the present embodiment becomes according to focal length (optical zoom multiplying power) and electronics Both burnt multiplying powers change judgment threshold, but can change judgement threshold according to one of focal length and electronic zoom multiplying power Value.Compared with the situation according to one of focal length and electronic zoom multiplying power to change judgment threshold, become according to focal length and electronics Both burnt multiplying powers make it possible to carry out Zoom control according to the intention of user to change judgment threshold.On the other hand, according to Jiao Away from making it possible to reduce the data volume and amount of calculation to be stored to change judgment threshold with one of electronic zoom multiplying power.

Embodiment 3

Then, embodiments of the invention 3 will be illustrated.The present embodiment sets the shooting for illustrating to include following Zoom control equipment Standby, wherein the Zoom control equipment is configured as carrying out FA diminutions in the case where the motion of picture pick-up device is big.In response to taking the photograph In the case of carrying out FA diminutions, it is expected that the motion for being used to search for subject by picture pick-up device (that is, is put down as the motion of equipment Shake) distinguished with the motion caused by handshaking of picture pick-up device, and expect to carry out FA in the case where carrying out yawing Reduce.The present embodiment is by using relevant the first value (speed or acceleration) of the motion with picture pick-up device and is used as picture pick-up device Amount of exercise second value to be provided for obtaining the reference position at shake angle by using acceleration, by picture pick-up device The big motion corresponding with yawing and the small motion caused by handshaking of picture pick-up device are distinguished.Speed includes angle Speed, acceleration includes angular acceleration, and amount of exercise includes shake angle.The present embodiment is fast by using detection angle is configured as The jitter sensor of degree obtains angular speed as the first value, and is integrated by angular velocity and is used as to obtain shake angle Second value.

Figure 11 shows the picture pick-up device 300 with FA zoom functions of the present embodiment.In the picture pick-up device 300 of the present embodiment In, represent the composition with the picture pick-up device 100 of embodiment 1 using with the reference identical reference in embodiment 1 The same or analogous constituent components of component, and eliminate the explanation for these constituent components.In the present embodiment, will be main Illustrate the difference with embodiment 1.

Microcomputer 102 in the picture pick-up device 300 of the present embodiment includes motion determination portion 128 and threshold value acquisition unit 129. The diminution using FA zoom functions is judged whether to using motion determination portion 128 and threshold value acquisition unit 129.Motion determination portion 128 to the angular speed by using the angular speed got from jitter sensor 101 and by being integrated the shake got Angle α judges whether user is just being carried out for changing the direction of picture pick-up device 300 to search for the operation (yawing) of subject.Yawing It is the operation in the direction for making picture pick-up device movement to change picture pick-up device in the horizontal direction.However, in the present embodiment, putting down Shaking ladle include as to make picture pick-up device movement with the pitching of the operation in the direction that vertically changes picture pick-up device.

Generally, the user for losing subject significantly moves his/her picture pick-up device to search for subject.Angular speed and trembling In the case that dynamic angle α (moment of momentum) is more than preset judgment threshold value (angular speed threshold value and/or angular movement threshold value described below), Motion determination portion 128 is judged as that user just makes picture pick-up device 300 move to search for subject.On the contrary, being clapped in user's positive stabilization In the case of taking the photograph subject, the motion of picture pick-up device is small.Thus, it is less than at least one angular speed and shake angle α and sentences accordingly In the case of disconnected threshold value, motion determination portion 128 is judged as that user is not just searching for subject, i.e. user and clapped just in camera watch region Take the photograph subject.Judgment threshold is determined by threshold value acquisition unit 129.Angular speed and shake angle α are will be explained in below with judging Relation between threshold value.It is configured as detecting the jitter sensor 101 of angular speed and is configured as obtaining from threshold value acquisition unit 129 The motion determination portion 128 of judgment threshold constitutes motion detector.

Zoom controller 118 will be used to carry out FA diminutions and FA in response to receiving judged result from motion determination portion 128 The drive signal of amplification is supplied to zoom motor 119.Zoom controller 116 and motion determination portion 128 constitute visual angle change portion.Tremble Dynamic sensor 101 and (including motion determination portion 128 and zoom controller 118) microcomputer 102 constitute Zoom control equipment.

Threshold value acquisition unit 129 obtains judgement according to the current focus (zoom position) got from zoom controller 118 Threshold value.In addition, in the present embodiment, same as Example 2, the judgment threshold dolly-out,ed dolly-back used in side, which is set, must be less than wide-angle side institute Judgment threshold.The present embodiment does not account for electronic zoom control, sets judgment threshold (that is, to use thus according to focal length Threshold value TH1 in embodiment 2).However, in the case where electronic zoom control period starts FA diminutions, expecting to use embodiment 2 In the threshold value TH2 according to set by electronic zoom multiplying power and focal length.

Then, it will illustrate that the angular speed and shake angle α of picture pick-up device 300 judge whether to start the judgement that AF reduces with being used for Relation between threshold value.Figure 12,13A and 13B show to enter from the state for photographing subject in camera watch region (visual angle) Example of the row yawing to follow angular speed during mobile main subject and shake angle α.Figure 12,13A and 13B each show to be directed to angle Pass between the judgment threshold (following also known as " the 3rd threshold value " or " angular speed threshold value ") of speed and detected angular speed System and for shaking the judgment threshold (below also known as " the 4th threshold value " or " shake angle threshold value ") at angle and detected trembling Relation between dynamic angle α.Figure 12 is shown by from the time point (left end in figure) that subject is photographed in camera watch region Angular velocity is integrated the comparative example of the change of accessed angular speed and shake angle α.

In fig. 12, in the case where photographing subject in camera watch region before carrying out yawing, angle α change is shaken It is small, and in the case that angular speed temporarily increases and must be equal to or higher than angular speed threshold value (Figure 12 time point A), shake Angle α is not more than shake angle threshold value, is thus reduced without FA.Afterwards, carrying out slow yawing to follow the feelings of subject Under condition, shake angle α increases in a direction (Figure 12 positive direction), then shakes angle α and becomes equal to or more than shake angle threshold Value.In this state, temporarily increase in angular speed and become equal to or higher than angular speed threshold value (Figure 12 time point B) feelings Under condition, subject is photographed in camera watch region, FA diminutions are also carried out.

On the other hand, as shown in FIG. 13A, the present embodiment photographs subject hour angle speed before yawing in camera watch region In the case that degree is less than angular speed threshold value, shake angle α is reset to 0, and become equal to or higher than angular speed threshold from angular speed The Each point in time (C in Figure 13 A) of value starts angular velocity and is integrated, to obtain shake angle α.

Then, shake angle α is reset to 0 by the present embodiment in the case where angular speed gets lower than angular speed threshold value.At it After carry out slow yawing in the case of, this is also identical.Due to although carry out this slow yawing, angular speed become in a short time Angular speed threshold value must be equal to or higher than, therefore before shake angle α goes above angular speed threshold value, shake angle α is reset to 0. As a result, it can prevent from carrying out FA diminutions in the case where slow yawing can follow subject.

On the other hand, it is identical with Figure 13 A in Figure 13 B of the present embodiment are shown, from photographed in camera watch region by In the case of the quick yawing for taking the photograph the subject that the state progress of body is used for search loss, angular speed becomes equal to or higher than angle Threshold speed, and state continuation.As a result, the present embodiment lights the product for carrying out angular speed from the time for starting search subject Divide to obtain shake angle α.In Figure 13 B time point E, shake angle α becomes equal to or more than shake angle threshold value, thus carries out FA contractings It is small.

As described above, the present embodiment became equal in angular speed or higher than the time point (reference position) of angular speed threshold value, Start the integration of the angular speed for obtaining shake angle α.The control makes it possible to prevent to carry out FA contractings when carrying out slow yawing It is small, and make it possible to carry out FA amplifications when carrying out quick yawing.

Figure 14 is the flow chart for FA Zoom controls (viewing angle control) processing that microcomputer 102 is carried out.Microcomputer 102 The processing is carried out according to the FA Zoom controls program as computer program.

In step s 200, zoom controller 118 keeps current zoom position to be used as benchmark zoom position f0.The benchmark becomes Burnt position f0 is the target zoom position for carrying out FA amplifications after being reduced.

Then, in S201, zoom controller 118 calculate for carry out FA diminutions target zoom position (hereinafter referred to as " shrinking of object position ") f1.For example, in the case where the reduction volume for reducing FA is set to 1/n times as focal length equivalence value, mesh It is f0/n to mark contracted position f1.Value n for calculating shrinking of object position can be that predetermined fixed value or user pass through dish Value can be set in the user that single operation etc. can be set.Furthermore, it is possible to set reduction volume by series.In this case, zoom is saturating Mirror moves m grades and reaches wide-angle side.Value m can be the value that predetermined fixed value or user can be set.

Then, in S202, motion determination portion 128 judges whether angular speed is equal to or higher than angular speed threshold value.Processing exists Angular speed enters S204 in the case of being equal to or higher than angular speed threshold value, otherwise into S203.In S203, microcomputer 102 Shake angle α is reset to 0 and terminates the routine.Then, the processing is back to S200.

Although ambiguity correction amount calculating part 103 obtains shake angle (being integrated to acceleration) in embodiment 1, at this In embodiment, it is different from shake angle used in ambiguity correction due to shaking the reference position at angle used in FA zoom functions Reference position, therefore motion determination portion 128 obtains shake angle used in FA zoom functions.However, this is only example and simultaneously It is nonrestrictive.In the present embodiment, the reference position at shake angle is to start ambiguity correction function used in ambiguity correction (ON) position of the picture pick-up device (optical axis X) during time point.On the other hand, the benchmark at shake angle used in FA zoom functions Position is to be become equal to angular speed or the position corresponding higher than the time point of angular speed threshold value.

On the other hand, in S204, zoom controller 118 calculates shake angle α.Specifically, 118 pairs of zoom controller is from trembling The angular velocity signal that dynamic sensor 101 is got is integrated to calculate shake angle α.In addition, becoming in the S204 of previous routine In the case that burnt controller 118 calculates shake angle α, the accumulative shake angle α being previously calculated out of zoom controller 118 and current meter Calculate shake angle α.The calculating makes it possible to become equal to or higher than the time at time point of angular speed threshold value relative in angular speed The reference position that axle X is located at obtain shake angle α (that is, by become equal to from angular speed or higher than angular speed threshold value when Between point proceed by integration accessed by angular speed integrated value).Calculate and tremble in previous routine in zoom controller 118 In the case of dynamic angle α, the shake angle α previously and currently calculated aggregate-value is set in the step by zoom controller 118 The shake angle α calculated.On the other hand, enter S203 from S202 in previous routine in zoom controller 118 therefore do not have In the case of calculating shake angle α, the shake angle α as the result of current integration is set in the step by zoom controller 118 The shake angle α calculated.Then, processing enters S205.

In S205, motion determination portion 128 judges whether shake angle (aggregate-value) α is equal to or more than shake angle threshold value, i.e. Whether quick yawing is carried out so that user searches for subject.If shaking angle α is equal to or more than shake angle threshold value, Zoom control Device 118 enters S206.If shaking angle α is less than shake angle threshold value, zoom controller 118 need not carry out the situation of FA diminutions Under be back to S200；Because photographing subject in camera watch region.

In S206, zoom controller 118 carries out FA diminutions towards the shrinking of object position f1 calculated in S201.So Afterwards, in S207, zoom controller 118 judges whether current zoom position reaches shrinking of object position f1.If current zoom Position does not reach shrinking of object position f1, then zoom controller 118 is back to S206 to continue FA diminutions.If current zoom Position reaches shrinking of object position f1, then zoom controller 118 enters S208.

In S208, it is that subject is photographed in camera watch region also that zoom controller 118, which judges motion determination portion 128, It is to carry out quick yawing to search for subject.If photographing subject in camera watch region, zoom controller 118 enters S209.If carrying out quick yawing to search for subject, weight while keeping zoom position to be in f1 of zoom controller 118 The multiple step.

In S209, zoom controller 118 carries out FA amplifications towards the benchmark zoom position f0 retained in S200.

In S210, zoom controller 118 judges whether current zoom position reaches benchmark zoom position f0, and if Current zoom position does not reach benchmark zoom position f0, then continues FA amplifications.On the other hand, if current zoom position is reached Benchmark zoom position f0, then zoom controller 118 terminate current routine to be back to S200.

After FA amplifications terminate, zoom controller 118 can change the value n (or m) for calculating shrinking of object position. In addition, in the case where user changes camera angle not over zoom key operation, zoom controller 118 can keep benchmark to become Burnt position f0 and shrinking of object position f1 and since S202 next routine.

As described above, the present embodiment use become equal to from angular speed or higher than angular speed threshold value time light angle speed The integrated value of degree resets shake angle as shake angle, and at the time point that angular speed gets lower than angular speed threshold value.This implementation Example further carries out FA diminutions in the case where angular speed goes above angular speed threshold value.The control makes it possible to prevent from taking the photograph Progress FA diminutions in the case of as shooting while subject (shooting image) slowly dollying equipment in region, and make Being capable of and significantly move the subject that to search for camera watch region outside move in the case of progress FA contracting quick in picture pick-up device It is small.

Although the present embodiment uses 0 as a reference value (hereinafter referred to as " shake angle a reference value ") for shaking angle, following institute The alternate embodiment (variation) stated uses shake angle in predetermined amount of time of the angular speed less than angular speed threshold value as trembling Dynamic angle a reference value.

Figure 15 be shown as angular speed less than angular speed threshold value predetermined amount of time (hereinafter referred to as " and a reference value calculate the time Section ") in shake angle average value shake angle a reference value.Zoom controller 118 is equal to or higher than angular speed threshold in angular speed The shake angle according to shake angle a reference value is calculated in the state of value, and in the case where angular speed becomes to be above angular speed threshold value Carry out FA diminutions.Can be by obtaining relative in the 0 shake angle as a reference value in above-described embodiment and this variation Shake angle a reference value between difference come obtain according to shake angle a reference value shake angle.Suitably a reference value can be set to calculate Period (for example, 1 second).

When shooting subject in camera watch region in the case of without yawing (and passing through unshowned slow yawing When shooting subject in camera watch region), angular speed only becomes to be above angular speed threshold value in a short time.Thus, using previous Angular speed each angular speed less than angular speed threshold value is averaged so that the angular speed after equalization be consistently lower than angle speed Spend threshold value.Accordingly it is possible to prevent carrying out FA diminutions in the state of slow yawing can follow subject.

On the other hand, as shown in figure 15, angular speed is caused to exceed angle speed for searching for the quick yawing for the subject lost Spend threshold value and the state is continued.As a result, the shake angle relative to shake angle a reference value exceedes shake angle threshold value.This In the case of, carry out FA diminutions.As just noted, trembling using the average value relative to the shake angle in a reference value calculating period Dynamic angle is as shake angle a reference value, and this also allows for preventing from carrying out FA diminutions in the case where carrying out slow yawing, and makes FA diminutions can be carried out in the case where carrying out quick yawing by obtaining.

In addition, using the average value for shaking angle in a reference value calculating period as shake angle a reference value, this makes it possible to The average jitter angle in the scheduled stop time section before yawing is enough got as shake angle a reference value, it is possible thereby to higher Precision judge caused by yawing shake angle change.

Although the present embodiment judges the motion of picture pick-up device using angular speed and shake angle, angular speed is replaced, can be with Use angular acceleration.In addition, instead of using jitter sensor, following structure can be used：Examined from continuous multiple two field pictures Motion vector is surveyed, and angular speed (or angular acceleration) and shake angle are obtained according to these motion vectors, or according to these fortune Dynamic vector obtains speed, acceleration and the displacement of main subject image.

Embodiment 4

The fourth embodiment of the present invention (embodiment 4) is corresponding with the combination of embodiment 1 and 3.The present embodiment and embodiment 1 Difference be for being judged as obtaining shot in the case that motion vector is undetectable in the S101 of Fig. 3 flow chart The method of the displacement of body image.In the present embodiment, in the case where being judged as that motion vector is undetectable, such as embodiment 3 Like that, zoom controller 118 by become equal to from angular speed or higher than angular speed threshold value at the beginning of between light angular velocity It is integrated to obtain shake angle, and uses accessed shake angle as the α in expression formula (2) to obtain subject figure The displacement d* of picture.Same as Example 3, in the case where angular speed gets lower than angular speed threshold value, zoom controller 118 enters One step resets to 0 (or resetting to calculated shake angle a reference value) by angle is shaken.Carrying out electronic zoom (electronic zoom Multiplying power is same as Example 1 in the case of 1), and correction of jitter angle is come by using electronic zoom multiplying power.

The invention is not restricted to these embodiments, and it can be carried out in the case of without departing from the scope of the present invention various Change and deformation.That is, picture pick-up device can such as camera lens exchangeable camera body and be detachably mounted to camera The combination of the multiple equipment of the lens changeable of body etc..Lens changeable can include above-mentioned microcomputer, shake sensing Device, ambiguity correction mechanism and zoom lens.

Although in addition, the displacement that above embodiments illustrates using motion vector to calculate main subject image shows Example, but alternate embodiment can calculate main subject by using other methods of subject identification and face detection etc. The displacement of image.

Other embodiments

(it can also can also be more completely referred to as that " non-transient computer can by reading and performing record in storage medium Read storage medium ") on computer executable instructions (for example, one or more programs) to carry out one in above-described embodiment Or multiple function and/or include one or more electricity of the function for carrying out one or more of above-described embodiment The computer of the system or equipment on road (for example, application specific integrated circuit (ASIC)) and realized by following method the present invention Embodiment, wherein, the computer of the system or equipment from storage medium for example, by reading and performing computer executable instructions To carry out the function of one or more of above-described embodiment and/or control one or more circuits to carry out above-mentioned reality The function of one or more of example is applied to carry out the above method.The computer can include one or more processors (for example, CPU (CPU), microprocessing unit (MPU)), and independent computer or independent computer processor can be included Network, to read and perform computer executable instructions.These computers can for example be can perform from network or storage medium Instruction is provided to computer.The storage medium can include such as hard disk, random access memory (RAM), read-only storage (ROM), the memory of Distributed Computer System, CD (such as compact disk (CD), digital versatile disc (DVD) or Blu-ray disc (BD)^TMDeng), one or more of flash memory devices and storage card etc..

While the present invention has been described with reference to the exemplary embodiments, it should be appreciated that, the invention is not restricted to disclosed Exemplary embodiments.The scope of the appended claims meets most wide explanation, to include all such modifications, equivalent structure and work( Energy.

Claims (18)

1. a kind of Zoom control equipment, for controlling visual angle, the Zoom control equipment includes：

Move acquisition unit (101,125), the amount of exercise for obtaining imaging optical system used in the shooting of main subject；

Calculating part (116), the master in captured image is calculated for the amount of exercise by using the imaging optical system The displacement of subject image；

Judging part (117), for judging whether the displacement of the main subject image is more than first threshold；And

Controller (118), for changing the visual angle,

Characterized in that, in the case where the displacement of the main subject image is more than the first threshold, the controller It is controlled such that the visual angle is used in the case of being less than the first threshold than the displacement of the main subject image Visual angle it is wide.

2. Zoom control equipment according to claim 1, wherein, in addition to electronic zoom controller, the electronic zoom Controller is used to carry out image procossing to change electronic zoom multiplying power,

Wherein, in the case where changing the electronic zoom multiplying power using the electronic zoom controller, the calculating part passes through The displacement of the main subject image is corrected using the electronic zoom multiplying power, and calculates the displacement conduct after correction The displacement of the main subject image.

3. Zoom control equipment according to claim 1, wherein, in addition to image blur correcting portion, described image is obscured Correction unit is used to correct the fuzzy of captured image,

Wherein, the calculating part calculates the motion of the correcting value and the imaging optical system using described image ambiguity correction portion Difference between amount, and calculate by using the difference calculated the displacement of the main subject image.

4. Zoom control equipment according to claim 1, wherein, in addition to detector, the detector is for from phase Taken image detection motion vector at the time of mutually different,

Wherein, in the case of the motion vector that the main subject image is detected in the detector, the calculating part passes through The displacement of the main subject image is calculated using detected motion vector, and is not detected in the detector To the main subject image motion vector in the case of, the calculating part by using the imaging optical system motion Measure to calculate the displacement of the main subject image.

5. Zoom control equipment according to claim 1, wherein, the first threshold is according to the imaging optical system Focal length and to the main subject subject distance and change.

6. Zoom control equipment according to claim 5, wherein, in the focal length of the imaging optical system or to the master First threshold used in the case of the subject distance of subject is set to be less than in the focal length or described shot Body first threshold used in the case of short.

7. Zoom control equipment according to claim 5, wherein, in addition to electronic zoom controller, the electronic zoom Controller is used to carry out image procossing to change electronic zoom multiplying power,

Wherein, the first threshold changes according to the electronic zoom multiplying power.

8. Zoom control equipment according to claim 1, wherein, it is more than in the displacement of the main subject image described In the case of first threshold, the controller carries out the diminution control for making the visual angle broaden, and reduces control described In the case that the displacement of the main subject image becomes less than Second Threshold during system, the controller carries out being used to make institute State the amplification control that visual angle narrows.

9. Zoom control equipment according to claim 8, wherein, in addition to：

Threshold value acquisition unit, for the focal length according to the imaging optical system and to the main subject subject distance at least One of obtain the first threshold and the Second Threshold；And

Electronic zoom controller, for carrying out image procossing to change electronic zoom multiplying power,

Wherein, in the case where the electronic zoom multiplying power is more than 1, the threshold value acquisition unit obtain the first threshold with it is described Difference between Second Threshold is the first threshold and the Second Threshold more than predetermined value.

10. Zoom control equipment according to claim 1, wherein,

The motion acquisition unit obtains first value relevant with the motion of the imaging optical system, wherein first value is institute At least one speed and acceleration of the motion of imaging optical system are stated,

The calculating part become equal to from first value or at the time of higher than three threshold values obtain and the camera optical system The relevant second value of the amount of movement of the motion of system, and obtain by using the second value position of the main subject image Shifting amount, and

The calculating part resets the second value at the time of first value gets lower than three threshold value, and with described First value become equal to again or at the time of higher than three threshold value on the basis of obtain the second value again.

11. Zoom control equipment according to claim 10, wherein, in addition to detector, the detector be used for from Taken image detection motion vector at the time of mutually different,

Wherein, in the case of the motion vector that the main subject image is detected in the detector, the calculating part passes through The displacement of the main subject image is calculated using detected motion vector, and is not detected in the detector To the main subject image motion vector in the case of, the calculating part calculates the master by using the second value The displacement of subject image.

12. a kind of Zoom control equipment, for controlling visual angle, the Zoom control equipment includes：

Move acquisition unit (101,128), the amount of exercise for obtaining imaging optical system；And

Controller (118,128), for changing the visual angle,

Characterized in that, the controller carries out following operate：(a) obtain as the value relevant with the amount of exercise speed or Acceleration is used as the first value；(b) become equal to from first value or at the time of higher than three threshold values obtain and taken the photograph with described As the relevant value of the amount of movement of the motion of optical system is used as second value；And (c) becomes equal in response to the second value Or more than the 4th threshold value, the visual angle is broadened.

13. Zoom control equipment according to claim 12, wherein, the controller gets lower than institute in first value The second value is reset at the time of stating three threshold values, and is become equal to again or higher than the 3rd threshold value with first value At the time of on the basis of obtain the second value again.

14. Zoom control equipment according to claim 12, wherein, the controller as the described first value to be less than institute On the basis of a reference value for the average value for stating the second value in the predetermined amount of time of the 3rd threshold value, become from first value The second value is obtained at the time of three threshold value.

15. Zoom control equipment according to claim 12, wherein, first value is angular speed or angular acceleration, with And the second value is shake angle.

16. a kind of picture pick-up device, it is characterised in that including：

Zoom control equipment according to any one of claim 1 to 15；And

Imaging sensor (110), for being imaged by the visual angle.

17. picture pick-up device according to claim 16, wherein, in addition to imaging optical system, wherein by the zoom control Control equipment changes the visual angle of the imaging optical system.

18. a kind of Zoom control method, for controlling visual angle, the Zoom control method includes：

The step of for obtaining the amount of exercise of imaging optical system used in the shooting of main subject (S100)；

Main subject image in captured image is calculated for the amount of exercise by using the imaging optical system The step of displacement (S101~S105)；And

For the step of whether displacement of the main subject image is more than first threshold to be judged,

Characterized in that, the Zoom control method also includes：

Described regard is controlled such that in the case of for being more than the first threshold in the displacement of the main subject image The angle step wider less than used visual angle in the case of the first threshold than the displacement of the main subject image.