WO2009157569A1 - 電子機器および撮像方法 - Google Patents
電子機器および撮像方法 Download PDFInfo
- Publication number
- WO2009157569A1 WO2009157569A1 PCT/JP2009/061787 JP2009061787W WO2009157569A1 WO 2009157569 A1 WO2009157569 A1 WO 2009157569A1 JP 2009061787 W JP2009061787 W JP 2009061787W WO 2009157569 A1 WO2009157569 A1 WO 2009157569A1
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- Prior art keywords
- displacement
- zoom
- unit
- control unit
- housing
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/009—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/667—Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6812—Motion detection based on additional sensors, e.g. acceleration sensors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
Definitions
- the present invention relates to an electronic device including an imaging unit and an imaging method.
- an input for executing enlargement and reduction of a captured image by the zoom function described above is performed by an instruction with an operation key provided in the electronic device. Therefore, there is a problem that the operation of the zoom function is difficult for the user.
- An object of the present invention is to provide an electronic device having a zoom function for a captured image and an imaging method.
- An electronic apparatus controls a housing, an imaging unit disposed in the housing, a display unit that displays an image captured by the imaging unit, and a zoom of an image captured by the imaging unit.
- a zoom control unit ; and a displacement detection unit that detects a displacement of the housing, wherein the zoom control unit zooms the captured image based on the displacement of the housing detected by the displacement detection unit.
- an electronic apparatus includes an acceleration sensor that is provided in the casing and detects acceleration, and the displacement detector is configured to detect the displacement of the casing based on the acceleration detected by the acceleration sensor. Is preferably detected.
- the electronic device includes a focus determination unit capable of determining a degree of focus of a captured image of the imaging unit, and the displacement detection unit is the imaging that is determined by the focus determination unit. It is preferable to detect the displacement of the housing based on a change in the degree of focus of the image.
- the displacement detection unit detects a displacement of the housing in an imaging direction of the imaging unit.
- the zoom control unit controls the zoom of the captured image when the focus degree determined by the focus determination unit changes by a predetermined value or more.
- the zoom control unit enlarges the captured image when the displacement detection unit detects a housing displacement in a direction approaching the subject.
- the zoom control unit reduces the captured image when the displacement detection unit detects a housing displacement in a direction away from the subject.
- the zoom control unit controls zooming of the image based on a degree of housing displacement detected by the displacement detection unit.
- the electronic apparatus further includes a storage unit that stores data indicating a relationship between the degree of displacement of the case and the degree of zoom, and the zoom control unit is a case detected by the displacement detection unit. It is preferable that a zoom level corresponding to the degree of displacement is extracted from the data stored in the storage unit, and the zoom of the captured image is controlled according to the extracted zoom level.
- the electronic apparatus further includes a zoom change instruction unit for instructing a change in a zoom degree of the image, and the zoom control unit includes the detected housing displacement and the zoom change instruction unit. It is preferable to control the zoom of the image in accordance with the zoom change instruction at.
- the zoom control unit changes the zoom of the image according to the instruction when a zoom change is instructed by the zoom change instruction unit within a predetermined time after the housing displacement is detected. It is preferable.
- the displacement detection unit measures a duration of the housing displacement
- the zoom control unit zooms the captured image when the duration measured by the displacement detection unit is longer than a predetermined time. Is preferably controlled.
- the displacement detection unit detects the housing displacement according to a maximum value of the acceleration detected by the acceleration sensor.
- the zoom control unit controls the zoom of the captured image based on the housing displacement when the close-up mode is set.
- An imaging method is an imaging method in an electronic apparatus including a display unit that displays an image captured by an imaging unit provided in a housing, and detects a displacement of the housing and detects the detected housing.
- the zoom of the captured image is controlled based on body displacement.
- zoom control for a captured image is simplified in an electronic device.
- a mobile phone 1 will be described as an example of an electronic device.
- the embodiment of the present invention is not limited to the first embodiment.
- the present invention can be applied to various electronic devices including an imaging device such as a PHS (Personal Handyphone System) and a PDA (Personal Digital Assistant).
- an imaging device such as a PHS (Personal Handyphone System) and a PDA (Personal Digital Assistant).
- FIG. 1 is a front perspective view of the cellular phone 1 according to the present embodiment in an opened state.
- FIG. 2 is a back view of the mobile phone 1 in the opened state.
- the mobile phone 1 includes an operation unit side body 2 and a display unit side body 3 as a housing.
- the operation unit side body 2 and the display unit side body 3 are connected so as to be openable and closable via a connecting part 4 having a hinge mechanism.
- the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a connecting portion 4.
- the mobile phone 1 can relatively move the operation unit side body 2 and the display unit side body 3 connected via the hinge mechanism. That is, in the mobile phone 1, the operation unit side body 2 and the display unit side body 3 are opened (open state), and the operation unit side body 2 and the display unit side body 3 are folded. It becomes possible to deform to (closed state).
- the closed state is a state in which both housings are arranged so as to overlap each other
- the open state is a state in which both housings are arranged so as not to overlap each other.
- the outer surface of the operation unit side body 2 is composed of a front case 2a and a rear case 2b.
- the operation unit side body 2 is configured such that the operation unit 11 and the microphone 12 that captures the voice uttered by the user of the mobile phone 1 are exposed on the front case 2a side. Further, as shown in FIG. 2, the operation unit side body 2 is arranged so that the lens unit 23a and the light emitting unit 23b constituting the camera unit 23 are exposed on the rear case 2b side.
- the operation unit 11 includes a function setting operation key 13 for operating various functions such as various settings, a phone book function, and a mail function, an input operation key 14 for inputting numbers of telephone numbers, mail characters, and the like. It is composed of a determination operation key 15 as an operation member for performing various operations and scrolling in the up / down / left / right directions.
- the determination operation key 15 includes an annular key 15a and a circular key 15b.
- Each key constituting the operation unit 11 is assigned a predetermined function according to the open / closed state of the operation unit side body 2 and the display unit side body 3, various modes, or the type of the activated application. (Key assignment). Then, when the user presses each key, an operation corresponding to the function assigned to each key is executed.
- the function is executed so that the imaging magnification and the like are adjusted and an imaging instruction is given. That is, a function is assigned to each key so that an imaging magnification is adjusted by pressing the annular key 15a, and an imaging instruction at a predetermined imaging magnification is given by pressing the circular key 15b. It is done.
- the microphone 12 is disposed on the outer end side opposite to the connecting portion 4 side in the longitudinal direction of the operation unit side body 2. That is, the microphone 12 is disposed on one outer end side when the mobile phone 1 is in the open state.
- the outer surface of the display unit side body 3 includes a front case 3a and a rear case 3b.
- the front case 3a in the display unit side body 3 is exposed to a display unit 21 for displaying various types of information including captured images and a speaker 22 as a receiver for outputting the voice of the other party on the call. Placed in.
- the display unit 21 includes a liquid crystal panel, a drive circuit that drives the liquid crystal panel, and a light source unit such as a backlight that emits light from the back side of the liquid crystal panel.
- the display unit 21 is configured to be able to continuously display an image of a subject at the time of imaging.
- the display unit 21 is an LCD (Liquid Crystal Display) that sequentially performs drawing processing based on the charge signals sequentially read from the image sensor 201 (see FIG. 3).
- the photographer can adjust the image magnification and the like with the annular key 15a of the decision operation key 15 while viewing the image of the subject displayed on the display unit 21, and the circular key can be used under the imaging conditions such as a desired image magnification.
- a subject such as a person can be imaged by pressing 15b.
- the cellular phone 1 performs magnification adjustment (zoom control) based on a detection value of an acceleration sensor 31 (FIG. 3) described later, in addition to the magnification adjustment by the annular key 15a.
- the foldable mobile phone 1 that can be folded by the connecting portion 4 is described.
- a sliding type in which one case is slid in one direction from the state where the operation unit side case 2 and the display unit side case 3 are superposed
- Rotation (horizontal rotation) type in which one casing is rotated around an axis along the overlapping direction of the section side casing 2 and the display section side casing 3, or the operation section side casing 2 and the display section
- a type (straight type) in which the side housing 3 is arranged in one housing and does not have a connecting portion
- FIG. 3 is a block diagram showing functions of the mobile phone 1 according to the present embodiment.
- the mobile phone 1 includes an operation unit 11, a display unit 21, a camera unit 23, a control unit 30, an acceleration sensor 31, a memory 32, and a timer 33.
- the display unit 21 performs predetermined image processing under the control of the control unit 30.
- the display unit 21 stores the processed image data in the frame memory and outputs the screen data at a predetermined timing.
- the camera unit 23 includes a lens unit 23a, an image sensor 201, and an image processing unit 202.
- the image sensor 201 converts light input through the lens unit 23a into a charge signal.
- the image processing unit 202 generates image data based on the charge signal, and delivers the image data to the control unit 30.
- the control unit 30 controls the entire mobile phone 1, and performs predetermined control on the display unit 21, the camera unit 23, and the like, for example.
- the control unit 30 receives inputs from the operation unit 11, the acceleration sensor 31, the timer 33, and the like, and executes various processes. Then, the control unit 30 controls the memory 32 when executing processing, and reads various programs and data and writes data.
- the acceleration sensor 31 detects the acceleration in the direction from the front case 2a to the rear case 2b.
- acceleration sensor 31 of the present embodiment is a single-axis type, the embodiment is not limited to the single-axis type.
- a multi-axis sensor having two or more axes provided for a game or other application may be used.
- the acceleration sensor 31 is configured to detect acceleration based on the current generated at this time. Also good.
- the acceleration sensor 31 measures the force applied to a predetermined mass by the piezoelectric element to obtain the acceleration for each axis, converts it into numerical data, and buffers it. And the control part 30 reads the acceleration data buffered periodically.
- the acceleration sensor 31 is not limited to a piezoelectric element (piezoelectric type), but may be a MEMS (Micro Electro Mechanical Systems) type such as a piezoresistive type, a capacitance type, a thermal detection type, or the like, or a moving current that is moved by moving a movable coil. Or a strain gauge type that measures strain caused by acceleration using a strain gauge.
- the memory 32 includes, for example, a working memory and is used for arithmetic processing by the control unit 30. Specifically, the memory 32 stores, for example, an acceleration table (FIG. 4) described later. Note that the memory 32 may also serve as a removable external memory.
- the timer 33 measures a predetermined time based on a command from the control unit 30 and notifies the control unit 30 of the measured time. Thereby, the control part 30 can branch the content of a process according to whether predetermined time has passed.
- the acceleration sensor 31 periodically detects the acceleration value applied to the mobile phone 1 as acceleration data. Then, the control unit 30 reads acceleration data detected by the acceleration sensor 31.
- the control unit 30 detects a change in position (housing displacement) in the imaging direction of the mobile phone 1 (housing) based on the detected acceleration data.
- the change in position is a distinction between forward movement and reverse movement in the imaging direction and the magnitude of acceleration.
- the control unit 30 may use not only the magnitude of acceleration but also the displacement speed, displacement time, displacement distance, and the like detected based on the detected acceleration as the position change.
- the acceleration accompanying the movement of the mobile phone 1 by the user can never take a constant value. That is, the acceleration changes from the start to the end of the movement, and the sign of the value is also reversed. Therefore, in the present embodiment, the acceleration at the initial stage of movement is adopted, and the acceleration that is maximum among them is set as the magnitude of the acceleration.
- the position change detection method is not limited to this, and a predetermined detection rule may be set. For example, a direction having a longer duration among positive and negative accelerations may be determined as the direction of movement.
- the magnitude of the acceleration is not limited to the maximum value, and may be an average value, an integrated value, or the like.
- control unit 30 reads a table indicating the relationship between the position change and the zoom amount from the memory 32. Then, the control unit 30 controls the camera unit 23 based on the read table data, and adjusts the degree of zoom of the image captured by the camera unit 23.
- FIG. 4 is a diagram showing an acceleration table that defines the relationship between the position change (housing displacement) and the zoom amount according to the present embodiment.
- a value (acceleration level) indicating the direction and magnitude of the acceleration detected as the position change is associated with the amount of change in the zoom level.
- control unit 30 adjusts the zoom by “+5” when the acceleration level “3” is detected, for example. Thereby, the user can perform zooming according to the direction and strength by moving the mobile phone 1 back and forth.
- FIG. 5 is a diagram illustrating a change in the angle of view of the camera unit 23 when the mobile phone 1 according to the present embodiment is moved away from the subject.
- the imaging range is the subject plane when the angle of view of the camera unit 23 is the angle of view ⁇ .
- the distance a is 42. Therefore, when the control unit 30 performs zoom-down according to the present embodiment and widens the angle of view to ⁇ , the imaging range becomes a part of the distance b of the subject surface 42.
- FIG. 6 is a diagram illustrating a change in the angle of view of the camera unit 23 when the mobile phone 1 according to the present embodiment is brought close to the subject.
- the angle of view of the camera unit 23 is the angle of view ⁇ .
- the imaging range is a portion of the distance c of the subject surface 44. Therefore, when the control unit 30 zooms up and narrows the angle of view to ⁇ according to the present embodiment, the imaging range becomes a part of the distance d of the subject surface 44.
- zooming up is performed when the cellular phone 1 is brought close to the subject, and zooming down is performed when the cellular phone 1 is moved away from the subject. Therefore, the user can perform a zoom operation in accordance with his / her sense. Further, since a large zoom effect can be obtained with a small movement of the mobile phone 1, the user can take an image of a desired size without greatly removing the subject from the focal length.
- FIG. 7 is a flowchart showing processing of the control unit 30 according to the present embodiment.
- step S101 the control unit 30 starts the operation of the camera unit 23 in response to an operation input from the user.
- step S ⁇ b> 102 the control unit 30 acquires an acceleration value from the acceleration sensor 31. Since the control unit 30 periodically acquires the acceleration value, the control unit 30 can refer to the transition of the acceleration value in a predetermined period up to this point.
- step S103 the control unit 30 determines whether or not the acceleration value acquired in step S102 has changed.
- the control unit 30 monitors the transition of the acceleration value from the past, and determines that it has changed when there is a change equal to or greater than a predetermined threshold. Alternatively, since the acceleration value is near zero when the mobile phone 1 is stationary, the control unit 30 may determine that the change has occurred when the value becomes equal to or greater than a predetermined value. If this determination is YES, the process proceeds to step S104, and if the determination is NO, the process proceeds to step S112.
- step S104 the control unit 30 determines whether or not the change in the acceleration value (case displacement) determined in step S103 continues for a predetermined time. If this determination is YES, the control unit 30 determines that the user has intentionally moved and moves the process to step S105. If the determination is NO, the control unit 30 determines that the movement is not intended by the user due to camera shake or the like. Then, the process proceeds to step S112.
- step S105 the control unit 30 determines whether or not the mobile phone 1 has moved away from the subject. That is, the control unit 30 determines whether or not the direction of acceleration as the housing displacement is the reverse direction toward the subject, and the mobile phone 1 has moved away from the subject. If this determination is YES, that is, if it is determined that the mobile phone 1 has moved away from the subject, the control unit 30 moves the process to step S109. If the determination is NO, that is, if it is determined that the mobile phone 1 is not away from the subject, the control unit 30 moves the process to step S106.
- step S106 the control unit 30 acquires the zoom increase amount from the acceleration table (FIG. 4) according to the acquired acceleration level.
- step S107 the control unit 30 determines whether or not the current zoom level is a limit of a range in which zoom adjustment is possible. If this determination is YES, the control unit 30 moves the process to step S112, and if the determination is NO, the control unit 30 moves the process to step S108.
- step S108 the control unit 30 controls the camera unit 23 according to the zoom increase amount acquired in step S106, and increases the zoom stage of the camera unit 23.
- step S109 the control unit 30 acquires a zoom reduction amount from the acceleration table (FIG. 4) according to the acquired acceleration level.
- step S110 the control unit 30 determines whether or not the current zoom level is a limit of a range in which zoom adjustment is possible. When this determination is YES, the control unit 30 moves the process to step S112, and when the determination is NO, the control unit 30 moves the process to step S111.
- step S111 the control unit 30 controls the camera unit 23 according to the zoom reduction amount acquired in step S109, and lowers the zoom level of the camera unit 23.
- step S112 the control unit 30 determines whether or not an imaging operation has been performed. Specifically, the control unit 30 determines that an imaging operation has been performed when the pressing of the circular key 15b (FIG. 1) or the like is detected. If this determination is YES, the control unit 30 moves the process to step S115, and if the determination is NO, the control unit 30 moves the process to step S113.
- step S113 the control unit 30 determines whether or not a predetermined time has elapsed (timed out) without determining execution of the imaging operation in step S112. If this determination is YES, control unit 30 moves the process to step S116, and if the determination is NO, the control unit 30 moves the process to step S114.
- step S114 the control unit 30 determines whether or not a camera function end operation has been performed. Specifically, the control unit 30 determines that the end operation of the camera function has been performed, for example, when the pressing of the end button or the like is detected in the function setting operation key 13 (FIG. 1). If this determination is YES, the control unit 30 moves the process to step S116, and if the determination is NO, the control unit 30 returns the process to step S102 and repeats the zoom process.
- step S116 the control unit 30 ends the operation of the camera unit 23 and ends the process.
- the mobile phone 1 performs zoom control by detecting whether the subject is approached or moved away without accepting the zoom setting by the operation unit 11.
- the operation of enlarging when moving closer to the subject and reducing when moving away from the subject is a user-friendly operation. Therefore, the user can easily zoom up or down by an intuitive operation.
- the control unit 30 uses the detection value of the acceleration sensor 31 in order to detect a change in the position of the mobile phone 1.
- the acceleration sensor is often already installed for the purpose of using it for games and other functions. Therefore, this embodiment can be used without adding new parts by using this acceleration sensor.
- the function of the mobile phone 1 is realized.
- the memory 32 included in the mobile phone 1 stores in advance the relationship between the acceleration and the zoom amount.
- the control unit 30 can immediately determine the zoom amount without performing complicated calculations. Furthermore, by increasing the degree of zoom as the position change (case displacement) detected based on the acceleration increases, the user can easily adjust the zoom amount, and more intuitive operation is possible.
- the detection of the change in acceleration within a predetermined time is determined as a camera shake, and the zoom adjustment is not performed. Therefore, it is possible to suppress a zoom process that is not intended by the user.
- FIG. 8 is a block diagram showing functions of the mobile phone 1 according to the present embodiment.
- the camera unit 23 further includes a focusing processing unit 203 in addition to the first embodiment (FIG. 3).
- the focus processing unit 203 detects a focus evaluation value indicating the degree of focus by cutting out a predetermined region of the image data and integrating the differential components.
- the control unit 30 performs zoom control based on the detected acceleration level.
- the control unit 30 detects a change in position (case displacement) of the mobile phone 1 based on the focus evaluation value detected by the focus processing unit 203, and performs imaging based on the change in position. Zoom control of the recorded image is performed.
- FIG. 9 is a flowchart showing processing of the control unit 30 according to the present embodiment. Steps S102 to S104 in the first embodiment (FIG. 7) are changed to steps S202 to S203, step S106 is changed to step S206, and step S109 is changed to step S209. The other steps are the same as those in the first embodiment. It is the same.
- step S202 the control unit 30 acquires a focus evaluation value indicating the degree of focus from the focus processing unit 203.
- the control unit 30 since the control unit 30 periodically acquires the focus evaluation value, the control unit 30 can refer to the transition of the focus evaluation value in a predetermined period up to this point.
- step S203 the control unit 30 determines whether or not the focus evaluation value acquired in step S202 has changed.
- the control unit 30 monitors the transition of the focus evaluation value from the past, and determines that it has changed when there is a change greater than or equal to a predetermined threshold. Alternatively, when the focus evaluation value is large and in focus, the control unit 30 decreases the focus evaluation value due to the movement of the mobile phone 1, so the focus evaluation value is smaller than the predetermined value. It may be determined that the time has changed. At this time, it is preferable that the control unit 30 adjust the predetermined value according to the in-focus distance. If this determination is YES, the control unit 30 moves the process to step S205, and if the determination is NO, the control unit 30 moves the process to step S212.
- step S206 or step S209 similarly to the acceleration table (FIG. 4), the control unit 30 increases the zoom amount from a table (not shown) in which the change in the focus evaluation value is associated with the increase / decrease amount of the zoom level. Or get the amount of zoom reduction.
- the association between the change in focus evaluation value and the zoom increase / decrease amount is preferably changed according to the focus distance. Further, the control unit 30 may detect the zoom increase / decrease amount according to a predetermined calculation rule according to the focus distance.
- a focusing processing unit 203 is provided as a means for detecting a change in the position of the mobile phone 1. Accordingly, the mobile phone 1 can detect a change in position by using the degree of focus of the image without adding a component such as the acceleration sensor 31. Therefore, the user can easily zoom up or down by an intuitive operation.
- control unit 30 performs zoom processing when the focus evaluation value changes more than a predetermined value. Therefore, the control unit 30 can prevent an unintended zoom operation from occurring due to a small change in the degree of focus caused by camera shake or the like.
- control unit 30 performs zoom processing when the amount of change in the focus evaluation value is equal to or greater than a predetermined value. Further, the control unit 30 may perform zoom processing when the focus evaluation value decreases. If the in-focus evaluation value increases, it can be determined that the user is moving the mobile phone 1 to focus, and thus the control unit 30 may be able to suppress zoom processing unintended by the user by this processing. is there.
- the control unit 30 stores an acceleration table (FIG. 4) in advance, and performs zoom control based on the stored zoom increase / decrease amount.
- the control unit 30 further includes a function of correcting data stored in the acceleration table.
- FIG. 10 is a diagram showing how the acceleration table according to the present embodiment is corrected.
- the control unit 30 increases the zoom stage by “5” based on the table A before correction.
- the control unit 30 increases the zoom increase amount corresponding to the acceleration level “3” from “5”. It is corrected to “7” and the corrected table B is stored.
- FIG. 11 is a flowchart showing processing of the control unit 30 according to the present embodiment. Here, the process after adjusting the zoom degree according to the acceleration change is shown.
- step S301 the control unit 30 determines whether or not a zoom level change input has been received from the operation unit 11. If this determination is YES, the control unit 30 moves the process to step S302, and if the determination is NO, the control unit 30 moves the process to step S303.
- step S302 the control unit 30 updates the data of the acceleration table based on the zoom degree change input received in step S301.
- step S303 the control unit 30 determines whether or not a predetermined time has passed without accepting a zoom degree change input in step S301. If this determination is YES, control unit 30 ends the process. If the determination is NO, control unit 30 returns the process to step S301 and continues to accept input.
- the control amount of zoom control can be changed by a user operation input. Therefore, the mobile phone 1 according to the present embodiment can provide a zoom function with high affinity for each user.
- the elapse of the predetermined time in step S303 may be a time elapse after the control unit 30 changes the zoom degree based on the acceleration table.
- the predetermined time may be several seconds, for example.
- the control unit 30 can reflect only the correction input to the operation unit 11 when the user wants to correct the zoom level in the acceleration table. Therefore, the mobile phone 1 according to the present embodiment can not only provide a zoom function with high affinity for each user, but also improve user convenience.
- the means for detecting a change in position indicates a change in the position of the mobile phone 1 based on a transition of the captured image data (enlargement, reduction, etc.) caused by the movement of the mobile phone 1 in the imaging direction, and a distance measurement result by ultrasonic waves. It may be detected, and the position change (casing displacement) of the mobile phone 1 in the imaging direction may be detected.
- both the zoom control based on the degree of focus and the zoom control using the acceleration sensor described above may be used. By doing so, the control unit 30 can perform more precise zoom control.
- the control unit 30 may perform the above zoom process when the macro mode is set.
- the macro mode since the distance that can be focused is limited, the mobile phone 1 cannot be moved greatly. Therefore, the present embodiment is preferable because a desired zoom setting can be realized with a small amount of movement by the zoom processing described above.
- the control unit 30 may perform the above-described zoom processing after focusing is successful by the AF function. Since the position change of the mobile phone 1 after successful focusing is often for adjusting the zoom setting, by adding this condition, the control unit 30 performs zoom processing at the timing intended by the user. There is a possibility that it can be executed. The zoom process described above may be executed until a predetermined time elapses after the focusing is successful by the AF function.
- the zoom process according to the present invention is preferably used for reading a two-dimensional code such as a QR code (registered trademark). That is, the image size and the degree of focus when a two-dimensional code is imaged greatly affect the reading accuracy. Therefore, since the zoom control can be easily performed without largely moving the mobile phone 1, the user can easily read.
- a two-dimensional code such as a QR code (registered trademark).
- the zoom function of the camera unit 23 in the above-described embodiment is not limited to digital zoom by image processing, and may be an optical zoom by displacing the lens unit 23a.
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Abstract
Description
以下、本発明の第1の実施形態について説明する。また、電子機器の一例として携帯電話機1を説明する。しかしながら、本発明の実施形態は、この第1の実施形態に限定されるものではない。例えば、PHS(Personal Handy phone System)やPDA(Personal Digital Assistant)等、撮像装置を備えた様々な電子機器に対しても、本発明は適用可能である。
なお、位置変化の検出方法はこれには限られず、所定の検出ルールを設定しておいてもよい。例えば、加速度の正負のうち、持続時間の長い向きを移動の方向と判断してもよい。加速度の大きさは、最大値に限らず、平均値や積算値等であってもよい。
以下、本発明の第2の実施形態について説明する。第2の実施形態では、第1の実施形態に加えて、合焦度合いの判定機能が追加される。
以下、本発明の第3の実施形態について説明する。第1の実施形態において、制御部30は、予め加速度テーブル(図4)を記憶し、記憶されたズーム増減量に基づいてズーム制御を行った。一方、第3の実施形態では、制御部30は、この加速度テーブルに記憶されるデータを補正する機能を更に備える。
このような実施形態であれば、制御部30によってズームが行われた直後のユーザの補正のみを操作部11から受け付けて、制御部30は、加速度テーブルのデータを更新する。したがって、ユーザがズームの度合いを補正したいと思ったときに操作部11に入力した補正のみを、制御部30は加速度テーブルに反映させることが可能となる。したがって、本実施形態の携帯電話機1は、ユーザそれぞれにとって親和性の高いズーム機能を提供するだけではなく、ユーザの利便性をより向上させることができる。
2 操作部側筐体(筐体)
3 表示部側筐体(筐体)
11 操作部(ズーム変更指示部)
21 表示部
23 カメラ部(撮像部)
23a レンズ部
30 制御部(ズーム制御部、変位検出部、ズーム変更指示部)
31 加速度センサ
32 メモリ(記憶部)
33 タイマ(変位検出部)
201 撮像素子
202 画像処理部
203 合焦処理部(合焦判定部)
Claims (15)
- 筐体と、
前記筐体内に配置される撮像部と、
前記撮像部が撮像した画像を表示する表示部と、
前記撮像部に撮像された画像のズームを制御するズーム制御部と、
前記筐体の変位を検出する変位検出部と、を備え、
前記ズーム制御部は、前記変位検出部によって検出された前記筐体の変位に基づいて前記撮像された画像のズームを制御する電子機器。 - 前記筐体内に設けられて、加速度を検出する加速度センサを備え、
前記変位検出部は、前記加速度センサにより検出された加速度に基づいて、前記筐体の変位を検出する、請求項1に記載の電子機器。 - 前記撮像部の撮像画像の合焦の度合いを判定可能な合焦判定部を備え、
前記変位検出部は、前記合焦判定部にて判定される前記撮像画像の合焦度合いの変化に基づいて前記筐体の変位を検出する、請求項1に記載の電子機器。 - 前記変位検出部は、前記撮像部の撮像方向における前記筐体の変位を検出する、請求項1に記載の電子機器。
- 前記ズーム制御部は、前記合焦判定部によって判定された前記合焦度合いが所定以上変化した場合に、前記撮像された画像のズームを制御する、請求項3に記載の電子機器。
- 前記ズーム制御部は、前記変位検出部が被写体に対して近付く方向の筐体変位を検出したとき、前記撮像された画像を拡大する、請求項4に記載の電子機器。
- 前記ズーム制御部は、前記変位検出部が被写体に対して遠ざかる方向の筐体変位を検出したとき、前記撮像された画像を縮小する、請求項4に記載の電子機器。
- 前記ズーム制御部は、前記変位検出部によって検出された筐体変位の度合いに基づいて前記画像のズームを制御する、請求項1に記載の電子機器。
- 前記筐体変位の度合いとズームの度合いとの関係を示すデータを記憶する記憶部を備え、
前記ズーム制御部は、前記変位検出部によって検出された筐体変位の度合いに対応したズームの度合いを、前記記憶部に記憶されている前記データから抽出し、抽出されたズーム度合いに応じて前記撮像された前記画像のズームを制御する、請求項8に記載の電子機器。 - 前記画像のズームの度合いの変更を指示するためのズーム変更指示部を有し、
前記ズーム制御部は、検出された前記筐体変位と前記ズーム変更指示部でのズーム変更指示とに応じて前記画像のズームを制御する、請求項1に記載の電子機器。 - 前記ズーム制御部は、前記筐体変位が検出されてから所定時間の内に、前記ズーム変更指示部でズーム変更が指示された場合に、前記指示に応じた前記画像のズーム変更を行う、請求項10に記載の電子機器。
- 前記変位検出部は、前記筐体変位の継続時間を計測し、
前記ズーム制御部は、前記変位検出部によって計測される前記継続時間が所定時間より長いとき、前記撮像された画像のズームを制御する、請求項1に記載の電子機器。 - 前記変位検出部は、前記加速度センサによって検出される前記加速度の最大値に応じて、前記筐体変位を検出する、請求項2に記載の電子機器。
- 前記ズーム制御部は、接写モードが設定されている場合に、前記筐体変位に基づき前記画像のズームを制御する、請求項1に記載の電子機器。
- 筐体に設けられる撮像部により撮像した画像を表示する表示部を備えた電子機器における撮像方法であって、
前記筐体の変位を検出し、当該検出された筐体変位に基づいて前記撮像された画像のズームを制御する撮像方法。
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US13/000,672 US20110117960A1 (en) | 2008-06-27 | 2009-06-26 | Electronic device and imaging method |
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DE102011109301B4 (de) * | 2011-08-03 | 2013-05-08 | 3Ality Digital Systems, Llc | Verfahren zum Korrigieren der Zoom-Einstellung und/oder des vertikalen Versatzes von Teilbildern eines Stereofilms sowie Steuerung oder Regelung eines Kamerarigs mit zwei Kameras |
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US20110117960A1 (en) | 2011-05-19 |
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KR101244563B1 (ko) | 2013-03-20 |
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