CN105635570B - Shooting preview method and system - Google Patents
Shooting preview method and system Download PDFInfo
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- CN105635570B CN105635570B CN201510998993.0A CN201510998993A CN105635570B CN 105635570 B CN105635570 B CN 105635570B CN 201510998993 A CN201510998993 A CN 201510998993A CN 105635570 B CN105635570 B CN 105635570B
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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
- H04N23/62—Control of parameters via user interfaces
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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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Abstract
The present invention relates to a kind of shooting preview method and systems, and this method comprises the following steps: obtaining the distance between camera lens and subject of filming apparatus, and complete in filming apparatus to defocused, acquisition focal length；Determine image distance according to the distance between the camera lens of filming apparatus and subject and the focal length, the image distance be subject at the distance between picture and the camera lens；Obtain the pantograph ratio of the photo of the subject currently shown in the preview interface of filming apparatus；According to the distance between the pantograph ratio, the camera lens of the image distance and filming apparatus and subject, the actual ratio information of the photo and subject is determined, and actual ratio information is shown in the preview interface.The present invention can effective auxiliary photo-taking, user can suitably change camera lens at a distance from subject according to the actual ratio information shown in preview interface, be obtained out and the satisfactory photo of size in kind with shooting.
Description
Technical field
The present invention relates to technique for taking fields, more particularly to a kind of shooting preview method and system.
Background technique
With the development of mobile communication technology, mobile phone obtains extensively sending out application in daily life, and the function of mobile phone is also more next
It is abundanter.The smart phone of the overwhelming majority all has shooting function at present.It, can only in preview interface when being shot using mobile phone
See the imaging of object, can not but learn the size of the object and actual object in preview interface, therefore in shooting photo
When lack intuitive understanding, and need to know the size of photo and actual object in some scenarios, it is clear that the prior art
In shooting preview method be unable to meet demand.
Summary of the invention
Based on this, to solve the problems of the prior art, the present invention provides one kind and mentions shooting preview method and system, is clapping
The actual ratio information that can show photo and subject is taken the photograph in the preview interface of device, to assist user to shoot.
To achieve the above object, the embodiment of the present invention uses following technical scheme:
A kind of shooting preview method, includes the following steps:
Obtain camera lens and the distance between subject of filming apparatus, and in filming apparatus completion to defocused,
Obtain focal length；
Image distance is determined according to the distance between the camera lens of the filming apparatus and subject and the focal length, it is described
Image distance be subject at picture the distance between with the camera lens；
Obtain the pantograph ratio of the photo of the subject currently shown in the preview interface of the filming apparatus；
According to the distance between the pantograph ratio, the camera lens of the image distance and the filming apparatus and subject,
It determines the actual ratio information of the photo and subject, and the actual ratio information is shown in the preview interface
On.
The present invention also provides a kind of shooting preview systems, comprising:
Object distance obtains module, the distance between camera lens and subject for obtaining filming apparatus；
Focal length obtains module, for completing in the filming apparatus to defocused, acquisition focal length；
Image distance computing module, for according to the distance between the camera lens of the filming apparatus and subject and described
Focal length determines image distance, the image distance be subject at the distance between picture and the camera lens；
Pantograph ratio obtains module, the subject currently shown in the preview interface for obtaining the filming apparatus
The pantograph ratio of photo；
Actual ratio determining module, for according to the camera lens of the pantograph ratio, the image distance and the filming apparatus with
The distance between subject determines the actual ratio information of the photo and subject；
Display module, for showing the actual ratio information in the preview interface.
The present invention can get the distance between camera lens and subject of filming apparatus, and can obtain preview interface and be taken in
The photo of the subject of preceding display and the actual ratio information of subject, and the actual ratio information is shown pre-
Look on interface, can effective auxiliary photo-taking, user can suitably change mirror according to the actual ratio information shown in preview interface
Head is obtained out and the satisfactory photo of size in kind at a distance from subject with shooting.
Detailed description of the invention
Fig. 1 is the flow diagram of shooting preview method of the invention in one embodiment；
Fig. 2 is the stream that the method for camera lens and the distance between subject of filming apparatus is obtained in the embodiment of the present invention
Journey schematic diagram；
Fig. 3 is a kind of flow diagram for the method for obtaining pantograph ratio in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of shooting preview system of the invention in one embodiment；
Fig. 5 is the structural schematic diagram that pantograph ratio obtains module in the embodiment of the present invention.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with preferred embodiment and attached drawing.Obviously, hereafter institute
The examples are only for explaining the invention for description, rather than limitation of the invention.Based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without making creative work belongs to what the present invention protected
Range.It should be noted that filming apparatus described in the embodiment of the present invention can include: mobile phone, tablet computer, digital camera etc.
It is only citing Deng, above-mentioned filming apparatus, and it is non exhaustive, including but not limited to above-mentioned filming apparatus.It also should be noted that
For ease of description, only some but not all contents related to the present invention are shown in the drawings.
Fig. 1 is the flow diagram of shooting preview method of the invention in one embodiment, and the shooting of the present embodiment is pre-
Look at method executing subject can be filming apparatus control system, such as the background control system of mobile phone.As shown in Figure 1, this reality
The shooting preview method applied in example includes the following steps:
Step S110 obtains the distance between camera lens and subject of filming apparatus；
When being taken pictures using filming apparatus such as mobile phones, filming apparatus can be obtained by distance measuring method in the prior art
Camera lens and the distance between subject, the distance hereinafter referred to as object distance is indicated with alphabetical u.
Step S120 is completed in the filming apparatus to defocused, acquisition focal length；
User focuses to subject using filming apparatus, after the completion of focusing, obtains focal length f.
Step S130 is determined according to the distance between the camera lens of the filming apparatus and subject and the focal length
Image distance, the image distance be subject at picture the distance between with the camera lens；
After obtaining object distance u and focal length f, that is, can determine image distance v, image distance v refer to subject at picture and shooting
The distance between camera lens of device.Specifically, can be calculated by Gauss formula:
1/f=1/u+1/v
Step S140 obtains the scaling of the photo of the subject currently shown in the preview interface of the filming apparatus
Than；
Pantograph ratio a refers to that the photo of the subject currently shown in preview interface is equivalent to former piece (i.e. subject
Body at picture) ratio, the configuration of filming apparatus is different, and the pantograph ratio supported is also different, in a kind of optional embodiment
In, user can be arranged according to demand pantograph ratio and show.
Step S150, according to the pantograph ratio, the camera lens of the image distance and the filming apparatus and subject it
Between distance, determine the actual ratio information of the photo and subject, and the actual ratio information is shown in institute
It states in preview interface.
After obtaining pantograph ratio a, image distance v and object distance u, the subject currently shown in preview interface can be obtained
The photo of body and the actual ratio information of subject.Specifically, the actual ratio information according to the ratio between image distance and object distance with
The product of pantograph ratio obtains, and obtains actual ratio information X for example, can be calculated by the following formula:
X=(v/u) * a
The photo of the subject currently shown on obtaining preview interface and the actual ratio information of subject
Afterwards, which is shown into preview interface (such as showing X:1 in preview interface), can effectively assists clapping
According to user can suitably change camera lens at a distance from subject according to the actual ratio information, be obtained out and material object with shooting
The satisfactory photo of size.
Currently, laser range sensor is widely used in various terminal equipment, laser range sensor is
The device of Accurate Determining is carried out to the distance of target using laser.Laser range sensor is a branch of very to target injection at work
Thin laser is received the laser beam of target reflection by photoelectric cell, then received from being emitted to by timer measurement laser beam
Time, to calculate to the distance of target.In view of the extensive use of laser range sensor, therefore in a kind of optional embodiment party
In formula, when filming apparatus is configured with laser range sensor at lens location, obtained using the laser range sensor
The distance between the camera lens and subject of filming apparatus (i.e. object distance u).Referring to shown in Fig. 2, the camera lens of filming apparatus is obtained
The process of the distance between subject includes:
Step S111 opens the laser range sensor of the filming apparatus when the filming apparatus is focused；
Step S112 receives the camera lens and the subject of the filming apparatus that the laser range sensor reports
The distance between body.
When filming apparatus is focused, the control system of filming apparatus issues enabled instruction, opens swashing for filming apparatus
Ligh-ranging sensor.After laser range sensor starting, pass through the camera lens and subject of laser Accurate Determining filming apparatus
The distance between, and the distance is reported to the control system of filming apparatus.Filming apparatus receives laser range sensor and reports
Data after, that is, obtain object distance u.
In addition, such as continuing through the camera lens and subject of the laser range sensor detection filming apparatus of filming apparatus
Distance, then will increase the power consumption of filming apparatus, therefore, in a kind of optional embodiment, referring to shown in Fig. 2, obtain and clap
Take the photograph the camera lens of device and the process of the distance between subject further include:
Step S113 completes to close the laser range sensor to defocused in the filming apparatus.
When the control system of filming apparatus receives the camera lens and subject for the filming apparatus that laser range sensor reports
After the distance between body, if detecting, filming apparatus completes focusing, and the control system of filming apparatus issues halt instruction, closes
The laser range sensor of filming apparatus is closed, to reduce the power consumption of filming apparatus, extends stand-by time.
In a kind of optional embodiment, as shown in figure 3, can also be prepared by the following pantograph ratio:
Step S141, obtain the photo of the subject currently shown in the preview interface height and former piece
Highly；
Step S142, the height according to the height of the photo of the subject currently shown and the former piece are true
The fixed pantograph ratio.
Specifically, due to the resolution ratio of the photo of the subject currently shown be it is known, root resolution ratio can
To determine the photo height m currently shown, and the size of former piece is fixed, therefore the height n of egative film is also known.In this way
It can determine pantograph ratio by the height m of the photo of the subject currently shown and the ratio between the height n of former piece.In this way,
After obtaining image distance v, object distance u, pantograph ratio (m/n), the photo of the subject currently shown in preview interface can be obtained
With the actual ratio information X of subject:
X=(v/u) * (m/n)
In a kind of optional embodiment, if the photo and subject of the subject that preview interface is currently shown
The actual ratio information of body is preset ratio information, then generates prompt information, and wherein prompt information includes acoustic information, flash of light letter
Breath etc..Effectively user can be assisted to shoot in this way.For example, user wishes the photo of shooting and the size of actual object is
0.5:1, i.e. preset ratio information are 0.5:1, are completed in filming apparatus to defocused, if the actual ratio letter shown in preview interface
Breath is not inconsistent with preset ratio information, and the adjustable camera lens of user is focused again at a distance from subject, if in preview interface
The actual ratio information of display is also 0.5:1, then generates prompt information, reminds user's current shooting distance to meet the requirements, user
It can directly shoot, thus obtain the photo met the requirements.It can be seen that the present invention effectively can assist user to shoot, when
Effect can be more preferable when the object being taken is located at the middle position of preview interface, and in addition the present invention imitates the ranging of planar object
Fruit is also more better.
In conclusion the present invention can be measured between the camera lens of filming apparatus and subject by laser range sensor
Distance, and can obtain the subject currently shown in preview interface photo and subject actual ratio believe
Breath, and the actual ratio information is shown in preview interface, can effective auxiliary photo-taking, user is according to the actual ratio information
Camera lens can suitably be changed at a distance from subject, obtained out and the satisfactory photo of size in kind with shooting.
According to the shooting preview method of aforementioned present invention, the present invention also provides a kind of shooting preview systems, below with reference to attached
Figure and preferred embodiment are illustrated shooting preview system of the invention.
Fig. 4 is the structural schematic diagram of shooting preview system of the invention in one embodiment.As shown in figure 4, the implementation
Shooting preview system in example, comprising:
Object distance obtains module 1, the distance between camera lens and subject for obtaining filming apparatus；
Focal length obtains module 2, for completing in the filming apparatus to defocused, acquisition focal length；
Image distance computing module 3, for according to the distance between the camera lens of the filming apparatus and subject and institute
State focal length and determine image distance, the image distance be subject at the distance between picture and the camera lens；
Pantograph ratio obtains module 4, the subject currently shown in the preview interface for obtaining the filming apparatus
Photo pantograph ratio；
Actual ratio determining module 5, for according to the camera lens of the pantograph ratio, the image distance and the filming apparatus with
The distance between subject determines the actual ratio information of the photo and subject；
Display module 6, for showing the actual ratio information in the preview interface.
When being taken pictures using filming apparatus such as mobile phones, object distance, which obtains module 1, can pass through ranging side in the prior art
Method obtains the distance between camera lens and subject of filming apparatus, i.e. object distance u.User is using filming apparatus to subject
Body is focused, and after the completion of focusing, focal length obtains module 2 and obtains focal length f.After obtaining object distance u and focal length f, image distance meter
Calculate module 3 be can determine image distance v, image distance v refer to subject at picture the distance between with the camera lens of filming apparatus.Specifically
, image distance computing module 3 can be calculated by Gauss formula:
1/f=1/u+1/v
The contracting of the photo of the subject currently shown in the preview interface of the pantograph ratio acquisition acquisition filming apparatus of module 4
It puts and compares a.Pantograph ratio a refers to that the photo of the subject currently shown in preview interface is equivalent to former piece (i.e. subject
At picture) ratio, the configuration of filming apparatus is different, and the pantograph ratio supported is also different, in a kind of optional embodiment,
User can be arranged according to demand pantograph ratio and show.
After obtaining pantograph ratio a, image distance v and object distance u, actual ratio determining module 5 be can be obtained in preview interface
The photo of the subject currently shown and the actual ratio information of subject.Specifically, the actual ratio information root
It is obtained according to the ratio between image distance and object distance and the product of pantograph ratio, obtains actual ratio information X for example, can be calculated by the following formula:
X=(v/u) * a
The photo and subject of the subject currently shown in preview interface are obtained in actual ratio determining module 5
After the actual ratio information of body, display module 6 is shown the actual ratio information in preview interface (such as in preview interface
Show X:1), can effective auxiliary photo-taking, user can suitably change camera lens and subject according to the actual ratio information
Distance is obtained out and the satisfactory photo of size in kind with shooting.
In a kind of optional embodiment, referring to shown in Fig. 4, object distance obtains module 1 and includes:
Laser ranging control module 11, for when the filming apparatus is focused, opening swashing for the filming apparatus
Ligh-ranging sensor；
Data reception module 12 receives the camera lens and the quilt of the filming apparatus that the laser range sensor reports
Shoot the distance between object.
It in a kind of optional embodiment, completes in filming apparatus to defocused, laser ranging control module 11, which is closed, to swash
Ligh-ranging sensor.
When filming apparatus is focused, laser ranging control module 11 issues enabled instruction, opens swashing for filming apparatus
Ligh-ranging sensor.After laser range sensor starting, pass through the camera lens and subject of laser Accurate Determining filming apparatus
The distance between, and the distance is reported to the control system of filming apparatus.Data reception module 12 receives laser ranging sensing
After the data that device reports, that is, obtain object distance u.
Such as continue through filming apparatus laser range sensor detection filming apparatus camera lens and subject away from
From, then will increase the power consumption of filming apparatus, therefore, in a kind of optional embodiment, when data reception module 12 receive swash
After the distance between camera lens and subject of the filming apparatus that ligh-ranging sensor reports, if laser ranging control module
11 detect that filming apparatus completes focusing, then laser ranging control module 11 issues halt instruction, closes the laser of filming apparatus
Distance measuring sensor extends stand-by time to reduce the power consumption of filming apparatus.
In a kind of optional embodiment, referring to Figure 5, pantograph ratio obtains module 4 and includes:
Height obtain module 41, obtain the photo of the subject currently shown in the preview interface height and
The height of former piece；
Pantagraph calculating module 42, according to the height of the photo of the subject currently shown and the former piece
Height determines the pantograph ratio.
In a kind of optional embodiment, referring to shown in Fig. 4, shooting preview system of the invention further includes cue module
7, the photo of the subject for currently showing in preview interface and the actual ratio information of subject are default
When percent information, prompt information is generated.
Shooting preview method provided by the embodiment of the present invention can be performed in above-mentioned shooting preview system, has execution method phase
The functional module and beneficial effect answered.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of shooting preview method, which comprises the steps of:
The distance between camera lens and the subject of filming apparatus are obtained, and is completed in the filming apparatus to defocused, acquisition
Focal length；
Image distance, the image distance are determined according to the distance between the camera lens of the filming apparatus and subject and the focal length
For subject at picture the distance between with the camera lens；
Obtain the pantograph ratio of the photo of the subject currently shown in the preview interface of the filming apparatus, the pantograph ratio
The photo of subject currently to show in the preview interface is equivalent to the ratio of former piece；
According to the distance between the pantograph ratio, the camera lens of the image distance and the filming apparatus and subject, determine
The actual ratio information of the photo and subject, and the actual ratio information is shown in the preview interface,
Wherein, the actual ratio information is obtained according to the ratio between image distance and object distance and the product of pantograph ratio.
2. shooting preview method according to claim 1, which is characterized in that obtain the camera lens and subject of filming apparatus
The process of the distance between body includes:
When the filming apparatus is focused, the laser range sensor of the filming apparatus is opened；
Receive the camera lens and the distance between the subject of the filming apparatus that the laser range sensor reports.
3. shooting preview method according to claim 2, which is characterized in that complete in the filming apparatus to defocused, pass
Close the laser range sensor.
4. shooting preview method according to any one of claim 1 to 3, which is characterized in that the pantograph ratio by with
Under type obtains:
Obtain the height of the photo of the subject currently shown in the preview interface and the height of former piece；
The pantograph ratio is determined according to the height of the height of the photo of the subject currently shown and the former piece.
5. shooting preview method according to any one of claim 1 to 3, which is characterized in that if the photo with clapped
The actual ratio information for taking the photograph object is preset ratio information, then generates prompt information.
6. a kind of shooting preview system characterized by comprising
Object distance obtains module, the distance between camera lens and subject for obtaining filming apparatus；
Focal length obtains module, for completing in the filming apparatus to defocused, acquisition focal length；
Image distance computing module, for according to the distance between the camera lens of the filming apparatus and subject and the focal length
Determine image distance, the image distance be subject at the distance between picture and the camera lens；
Pantograph ratio obtains module, the photo of the subject currently shown in the preview interface for obtaining the filming apparatus
Pantograph ratio, the pantograph ratio is the ratio that the photo of subject currently shown in the preview interface is equivalent to former piece
Example；
Actual ratio determining module, for according to the camera lens of the pantograph ratio, the image distance and the filming apparatus with clapped
The distance between object is taken the photograph, determines the actual ratio information of the photo and subject；Wherein, the actual ratio information
It is obtained according to the ratio between image distance and object distance and the product of pantograph ratio；
Display module, for showing the actual ratio information in the preview interface.
7. shooting preview system according to claim 6, which is characterized in that the object distance obtains module and includes:
Laser ranging control module, for opening the laser ranging of the filming apparatus when the filming apparatus is focused
Sensor；
Data reception module receives the camera lens and the subject of the filming apparatus that the laser range sensor reports
The distance between body.
8. shooting preview system according to claim 7, which is characterized in that complete in the filming apparatus to defocused, institute
It states laser ranging control module and closes the laser range sensor.
9. the shooting preview system according to any one of claim 6 to 8, which is characterized in that the pantograph ratio obtains mould
Block includes:
Height obtains module, obtain the photo of the subject currently shown in the preview interface height and former piece
Highly；
Pantagraph calculating module, the height according to the height of the photo of the subject currently shown and the former piece are true
The fixed pantograph ratio.
10. the shooting preview system according to any one of claim 6 to 8, which is characterized in that it further include cue module,
For the actual ratio information in the photo and subject be preset ratio information when, generate prompt information.
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| CN106840005A (en) * | 2017-01-24 | 2017-06-13 | 国网山东省电力公司海阳市供电公司 | A kind of aerial condutor line footpath noncontact assay method and specifications of cables plate |
| CN106993137A (en) * | 2017-04-26 | 2017-07-28 | 广东小天才科技有限公司 | Method and device for determining terminal shooting mode |
| CN107249098A (en) * | 2017-05-27 | 2017-10-13 | 珠海市魅族科技有限公司 | Zoom control method, device, terminal and non-volatile memory medium |
| CN109769091B (en) * | 2019-02-22 | 2020-09-18 | 维沃移动通信有限公司 | Image shooting method and mobile terminal |
| CN110260716A (en) * | 2019-07-11 | 2019-09-20 | 鹰眼电子科技有限公司 | Emit shield and its launching technique |
| CN111770275B (en) * | 2020-07-02 | 2022-05-03 | 维沃移动通信有限公司 | Shooting method and device, electronic equipment and readable storage medium |
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| JP3157570B2 (en) * | 1991-11-22 | 2001-04-16 | オリンパス光学工業株式会社 | Camera with zoom optical system |
| JPH0675156A (en) * | 1992-08-26 | 1994-03-18 | Asahi Optical Co Ltd | Camera provided with remote controller |
| CN100388760C (en) * | 2004-12-30 | 2008-05-14 | 亚洲光学股份有限公司 | Ranging type digital camera |
| JP2008078828A (en) * | 2006-09-19 | 2008-04-03 | Ricoh Co Ltd | Imaging apparatus |
| CN101676683A (en) * | 2008-09-19 | 2010-03-24 | 鸿富锦精密工业（深圳）有限公司 | Dimension detection system and detection method |
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| CN102761700B (en) * | 2011-04-29 | 2015-01-21 | 国际商业机器公司 | Shooting device and method for obtaining distance between different points on shot object |
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| CN104243832A (en) * | 2014-09-30 | 2014-12-24 | 北京金山安全软件有限公司 | Method and device for shooting through mobile terminal and mobile terminal |
| CN104754217A (en) * | 2015-03-06 | 2015-07-01 | 深圳市欧珀通信软件有限公司 | Shooting method and terminal |
| CN105187719A (en) * | 2015-08-21 | 2015-12-23 | 深圳市金立通信设备有限公司 | Shooting method and terminal |
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Address after: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant before: Guangdong OPPO Mobile Communications Co., Ltd. |
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