CN105635570A - Shooting preview method and system - Google Patents
Shooting preview method and system Download PDFInfo
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- CN105635570A CN105635570A CN201510998993.0A CN201510998993A CN105635570A CN 105635570 A CN105635570 A CN 105635570A CN 201510998993 A CN201510998993 A CN 201510998993A CN 105635570 A CN105635570 A CN 105635570A
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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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- Human Computer Interaction (AREA)
- Studio Devices (AREA)
Abstract
The invention relates to a shooting preview method and system. The method includes the following steps: obtaining the distance between a lens of a shooting device and a shot object, and obtaining a focal length after the shooting device completes focus; determining an image distance according to the distance between the lens of the shooting device and the shot object and the focal length, the image distance being the distance between an image of the shot object and the lens; obtaining a zoom ratio of a photo of the shot object currently displayed in a preview interface of the shooting device; and determining actual ratio information of the photo and the shot object according to the zoom ratio, the image distance, and the distance between the lens of the shooting device and the shot object, and displaying the actual ratio information in the preview interface. The shooting preview method and system can effectively assist the shooting. A user can properly change the distance between the lens and the shot object according to the actual ratio information displayed in the preview interface and shoot the photo of which the size ratio with the actual object satisfies a requirement.
Description
Technical field
The present invention relates to technique for taking field, particularly relate to a kind of shooting preview method and system.
Background technology
Along with the development of mobile communication technology, mobile phone obtains wide sending out in daily life and applies, and the function of mobile phone is also more and more abundanter. The smart mobile phone of the overwhelming majority all possesses shoot function at present. When using mobile phone to take, preview interface can only be seen the imaging of object, but the size of the object in preview interface and actual object cannot be learnt, therefore lack when taking pictures and recognize intuitively, and needing to know the size of photo and actual object in some scenarios, it is clear that shooting preview method of the prior art can not satisfy the demands.
Summary of the invention
Based on this, for solving the problems of the prior art, the present invention provides one to put forward shooting preview method and system, can show the substantial proportion information of photo and subject, take with assisted user in the preview interface of filming apparatus.
For achieving the above object, the embodiment of the present invention is by the following technical solutions:
A kind of shooting preview method, comprises the steps:
Obtain the distance between the camera lens of filming apparatus and subject, and after described filming apparatus completes focusing, obtain focal length;
Distance and described focal length between camera lens according to described filming apparatus and subject determine image distance, and described image distance is the distance between the picture that becomes of subject and described camera lens;
Ratio is put in the contracting obtaining the photo of the subject of current display in the preview interface of described filming apparatus;
The distance between the camera lens of ratio, described image distance and described filming apparatus and subject is put, it is determined that the substantial proportion information of described photo and subject according to described contracting, and by described substantial proportion information displaying in described preview interface.
The present invention also provides a kind of shooting preview system, comprising:
Object distance acquisition module, for the distance obtained between the camera lens of filming apparatus and subject;
Focal length acquisition module, for, after described filming apparatus completes focusing, obtaining focal length;
Image distance calculates module, determines image distance for the distance between the camera lens according to described filming apparatus and subject and described focal length, and described image distance is the distance between the picture of subject one-tenth and described camera lens;
Contracting is put than acquisition module, and in the preview interface obtaining described filming apparatus, ratio is put in the contracting of the photo of the subject of current display;
Substantial proportion determination module, for the distance put according to described contracting between the camera lens of ratio, described image distance and described filming apparatus and subject, it is determined that the substantial proportion information of described photo and subject;
Display module, for by described substantial proportion information displaying in described preview interface.
The present invention can obtain the distance between the camera lens of filming apparatus and subject, and the photo of subject and the substantial proportion information of subject of current display in preview interface can be obtained, and by this substantial proportion information displaying in preview interface, can effective auxiliary photo-taking, user can suitably change the distance of camera lens and subject according to this substantial proportion information of display in preview interface, obtains out photo satisfactory with the size of material object to take.
Accompanying drawing explanation
Fig. 1 is the shooting preview method of the present invention schematic flow sheet in an embodiment;
Fig. 2 is the schematic flow sheet of the method for the distance obtaining between the camera lens of filming apparatus and subject in the embodiment of the present invention;
Fig. 3 be in the embodiment of the present invention a kind of obtain contracting put than the schematic flow sheet of method;
Fig. 4 is the shooting preview system of the present invention structural representation in an embodiment;
Fig. 5 is that in the embodiment of the present invention, the structural representation than acquisition module is put in contracting.
Embodiment
Below in conjunction with better embodiment and accompanying drawing, the content of the present invention is described in further detail. Obviously, hereafter described embodiment is only for explaining the present invention, but not limitation of the invention. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention. It should be noted that the filming apparatus described in the embodiment of the present invention can comprise: mobile phone, panel computer, digital camera etc., above-mentioned filming apparatus is only citing, and non exhaustive, including but not limited to above-mentioned filming apparatus. It also should be noted that, for convenience of description, accompanying drawing illustrate only part related to the present invention and not all content.
Fig. 1 is the shooting preview method of the present invention schematic flow sheet in an embodiment, and the executive agent of the shooting preview method of the present embodiment can be the Controlling System of filming apparatus, the background control system of such as mobile phone. As shown in Figure 1, the shooting preview method in the present embodiment comprises the steps:
Step S110, obtains the distance between the camera lens of filming apparatus and subject;
When filming apparatus such as using mobile phone is taken pictures, obtaining the distance between the camera lens of filming apparatus and subject by distance-finding method of the prior art, this distance, hereinafter referred to as object distance, represents with letter u.
Step S120, after described filming apparatus completes focusing, obtains focal length;
User uses filming apparatus to be focused by subject, after focusing completes, obtains focal distance f.
Step S130, determines image distance according to the distance between the camera lens of described filming apparatus and subject and described focal length, and described image distance is the distance between the picture of subject one-tenth and described camera lens;
After obtaining object distance u and focal distance f, can determining image distance v, image distance v refers to the distance between the picture that subject becomes and the camera lens of filming apparatus. Concrete, calculate by Gauss formula:
1/f=1/u+1/v
Step S140, ratio is put in the contracting obtaining the photo of the subject of current display in the preview interface of described filming apparatus;
Contracting is put and is referred to that the photo of the subject of current display in preview interface is equivalent to the ratio of former (picture that namely subject becomes) than a, the configuration of filming apparatus is different, its contracting supported is put than also different, in one optionally enforcement mode, user can arrange contracting according to demand and put than showing.
Step S150, puts the distance between the camera lens of ratio, described image distance and described filming apparatus and subject, it is determined that the substantial proportion information of described photo and subject according to described contracting, and by described substantial proportion information displaying in described preview interface.
After obtaining contracting and putting than a, image distance v and object distance u, the photo of subject and the substantial proportion information of subject of current display in preview interface can be obtained. Concrete, this substantial proportion information according to the ratio of image distance and object distance and contracting put than product obtain, such as, obtain substantial proportion information X by following formulae discovery:
X=(v/u) * a
After the photo of subject obtaining current display in preview interface and the substantial proportion information of subject, this substantial proportion information displaying (is such as shown X:1) in preview interface in preview interface, can effective auxiliary photo-taking, user can suitably change the distance of camera lens and subject according to this substantial proportion information, obtains out photo satisfactory with the size of material object to take.
At present, laser range sensor is widely used on various terminating unit, and laser range sensor is the device utilizing laser that the distance of target carries out accurately mensuration. Laser range sensor operationally penetrates a branch of very thin laser to target, the laser beam reflected by sealed cell receiving target, then measures laser beam from the time being transmitted into reception by timing register, thus calculates the distance to target. In view of the widespread use of laser range sensor, therefore in one optionally enforcement mode, when filming apparatus is configured with laser range sensor at lens location place, this laser range sensor can be utilized to obtain the distance (i.e. object distance u) between the camera lens of filming apparatus and subject. With reference to, shown in Fig. 2, the process obtaining the distance between the camera lens of filming apparatus and subject comprises:
Step S111, when described filming apparatus is focused, opens the laser range sensor of described filming apparatus;
Step S112, receives the distance between the camera lens of the described filming apparatus that described laser range sensor reports and described subject.
When filming apparatus is focused, the Controlling System of filming apparatus sends startup instruction, opens the laser range sensor of filming apparatus. Laser range sensor accurately measures the distance between the camera lens of filming apparatus and subject by laser, and this distance reports to the Controlling System of filming apparatus after starting. Namely filming apparatus obtains object distance u after receiving the data that laser range sensor reports.
In addition, as continued through the camera lens of laser range sensor detection filming apparatus and the distance of subject of filming apparatus, then can increase the power consumption of filming apparatus, therefore, in one optionally enforcement mode, with reference to, shown in Fig. 2, the process obtaining the distance between the camera lens of filming apparatus and subject also comprises:
Step S113, after described filming apparatus completes focusing, closes described laser range sensor.
After the Controlling System of filming apparatus receives the distance between the camera lens of the filming apparatus that laser range sensor reports and subject, if detecting, filming apparatus completes focusing, then the Controlling System of filming apparatus sends stop instruction, close the laser range sensor of filming apparatus, to reduce the power consumption of filming apparatus, prolongs standby time.
In one optionally enforcement mode, as shown in Figure 3, also obtain contracting by following method and put ratio:
Step S141, obtains the height of photo and the height of former of the subject of current display in described preview interface;
According to the height of the height of the photo of the subject of described current display and described former, step S142, determines that ratio is put in described contracting.
Concrete, owing to the resolving power of the photo of the subject currently shown is known, therefore, root resolving power can determine the photo height m of current display, and the size of former is fixing, and therefore the height n of egative film is also known. Can determine that ratio is put in contracting by the ratio of the height m of photo and the height n of former of the subject currently shown like this. Like this, after acquisition image distance v, object distance u, contracting are put than (m/n), the photo of subject and the substantial proportion information X of subject of current display in preview interface can be obtained:
X=(v/u) * (m/n)
In one optionally enforcement mode, if the photo of subject that currently shows of preview interface and the substantial proportion information of subject are preset ratio information, then generating information, wherein information comprises sound information, flash of light information etc. Like this can effectively assisted user shooting. Such as, user wishes that the photo of shooting and the size of actual object are 0.5:1, namely preset ratio information is 0.5:1, after filming apparatus completes focusing, if the substantial proportion information of display in preview interface and preset ratio information are not inconsistent, the distance that user can adjust camera lens and subject is focused again, if the substantial proportion information of display is also 0.5:1 in preview interface, then generate information, user's current shooting distance is reminded to meet the requirements, user can directly take, and so just obtains the photo meeting and requiring. It thus is seen that the present invention can effectively take by assisted user, when the object being taken is positioned at the mid-way of preview interface, effect can be better, and the present invention is also more better for the range finding effect of planar object in addition.
In sum, the present invention records the distance between the camera lens of filming apparatus and subject by laser range sensor, and the photo of subject and the substantial proportion information of subject of current display in preview interface can be obtained, and by this substantial proportion information displaying in preview interface, can effective auxiliary photo-taking, user can suitably change the distance of camera lens and subject according to this substantial proportion information, obtains out photo satisfactory with the size of material object to take.
Shooting preview method according to above-mentioned the present invention, the present invention also provides a kind of shooting preview system, the shooting preview system of the present invention is described below in conjunction with accompanying drawing and better embodiment.
Fig. 4 is the shooting preview system of the present invention structural representation in an embodiment. As shown in Figure 4, the shooting preview system in this embodiment, comprising:
Object distance acquisition module 1, for the distance obtained between the camera lens of filming apparatus and subject;
Focal length acquisition module 2, for, after described filming apparatus completes focusing, obtaining focal length;
Image distance calculates module 3, determines image distance for the distance between the camera lens according to described filming apparatus and subject and described focal length, and described image distance is the distance between the picture of subject one-tenth and described camera lens;
Contracting is put than acquisition module 4, and in the preview interface obtaining described filming apparatus, ratio is put in the contracting of the photo of the subject of current display;
Substantial proportion determination module 5, for the distance put according to described contracting between the camera lens of ratio, described image distance and described filming apparatus and subject, it is determined that the substantial proportion information of described photo and subject;
Display module 6, for by described substantial proportion information displaying in described preview interface.
When filming apparatus such as using mobile phone is taken pictures, object distance acquisition module 1 obtains the distance between the camera lens of filming apparatus and subject by distance-finding method of the prior art, i.e. object distance u. User uses filming apparatus to be focused by subject, and after focusing completes, focal length acquisition module 2 obtains focal distance f. After obtaining object distance u and focal distance f, image distance calculates module 3 can determine image distance v, and image distance v refers to the distance between the picture that subject becomes and the camera lens of filming apparatus. Concrete, image distance calculates module 3 and calculates by Gauss formula:
1/f=1/u+1/v
The contracting that the photo of the subject obtaining in the preview interface of filming apparatus current display than acquisition module 4 is put in contracting is put and is compared a. Contracting is put and is referred to that the photo of the subject of current display in preview interface is equivalent to the ratio of former (picture that namely subject becomes) than a, the configuration of filming apparatus is different, its contracting supported is put than also different, in one optionally enforcement mode, user can arrange contracting according to demand and put than showing.
After obtaining contracting and putting than a, image distance v and object distance u, substantial proportion determination module 5 can obtain the photo of subject and the substantial proportion information of subject of current display in preview interface. Concrete, this substantial proportion information according to the ratio of image distance and object distance and contracting put than product obtain, such as, obtain substantial proportion information X by following formulae discovery:
X=(v/u) * a
After obtaining in preview interface the photo of subject currently shown and the substantial proportion information of subject at substantial proportion determination module 5, this substantial proportion information displaying (is such as shown X:1) by display module 6 in preview interface in preview interface, can effective auxiliary photo-taking, user can suitably change the distance of camera lens and subject according to this substantial proportion information, obtains out photo satisfactory with the size of material object to take.
In one optionally enforcement mode, with reference to, shown in Fig. 4, object distance acquisition module 1 comprises:
Laser ranging control module 11, for when described filming apparatus is focused, opening the laser range sensor of described filming apparatus;
Data sink module 12, receives the distance between the camera lens of the described filming apparatus that described laser range sensor reports and described subject.
In one optionally enforcement mode, after filming apparatus completes focusing, laser ranging control module 11 closes laser range sensor.
When filming apparatus is focused, laser ranging control module 11 sends startup instruction, opens the laser range sensor of filming apparatus. Laser range sensor accurately measures the distance between the camera lens of filming apparatus and subject by laser, and this distance reports to the Controlling System of filming apparatus after starting. After data sink module 12 receives the data that laser range sensor reports, namely obtain object distance u.
As continued through the camera lens of laser range sensor detection filming apparatus and the distance of subject of filming apparatus, then can increase the power consumption of filming apparatus, therefore, in one optionally enforcement mode, receive the distance between the camera lens of the filming apparatus that laser range sensor reports and subject when data sink module 12 after, if laser ranging control module 11 detects that filming apparatus completes focusing, then laser ranging control module 11 sends stop instruction, close the laser range sensor of filming apparatus, to reduce the power consumption of filming apparatus, prolongs standby time.
In one optionally enforcement mode, with reference to, shown in Fig. 5, contracting is put and is comprised than acquisition module 4:
Height acquisition module 41, obtains the height of photo and the height of former of the subject of current display in described preview interface;
According to the height of the height of the photo of the subject of described current display and described former, pantagraph calculating module 42, determines that ratio is put in described contracting.
In one optionally enforcement mode, with reference to shown in Fig. 4, the shooting preview system of the present invention also comprises reminding module 7, when being preset ratio information for the photo of subject of display current in preview interface with the substantial proportion information of subject, and generation information.
Above-mentioned shooting preview system can perform the shooting preview method that the embodiment of the present invention provides, and possesses manner of execution corresponding function module and useful effect.
Each technology feature of the above embodiment can combine arbitrarily, for making description succinct, each all possible combination of technology feature in above-described embodiment is not all described, but, as long as the combination of these technology features does not exist contradiction, all it is considered to be the scope that this specification sheets is recorded.
The above embodiment only have expressed several enforcement modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent. , it is also possible to make some distortion and improvement, it should be appreciated that for the person of ordinary skill of the art, without departing from the inventive concept of the premise these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a shooting preview method, it is characterised in that, comprise the steps:
Obtain the distance between the camera lens of filming apparatus and subject, and after described filming apparatus completes focusing, obtain focal length;
Distance and described focal length between camera lens according to described filming apparatus and subject determine image distance, and described image distance is the distance between the picture that becomes of subject and described camera lens;
Ratio is put in the contracting obtaining the photo of the subject of current display in the preview interface of described filming apparatus;
The distance between the camera lens of ratio, described image distance and described filming apparatus and subject is put, it is determined that the substantial proportion information of described photo and subject according to described contracting, and by described substantial proportion information displaying in described preview interface.
2. shooting preview method according to claim 1, it is characterised in that, the process obtaining the distance between the camera lens of filming apparatus and subject comprises:
When described filming apparatus is focused, open the laser range sensor of described filming apparatus;
Receive the distance between the camera lens of the described filming apparatus that described laser range sensor reports and described subject.
3. shooting preview method according to claim 2, it is characterised in that, after described filming apparatus completes focusing, close described laser range sensor.
4. shooting preview method according to any one of claim 1 to 3, it is characterised in that, described contracting is put than obtaining in the following manner:
Obtain the height of photo and the height of former of the subject of current display in described preview interface;
The height of the photo of the subject according to described current display and the height of described former determine that ratio is put in described contracting.
5. shooting preview method according to any one of claim 1 to 3, it is characterised in that, if the substantial proportion information of described photo and subject is preset ratio information, then generate information.
6. a shooting preview system, it is characterised in that, comprising:
Object distance acquisition module, for the distance obtained between the camera lens of filming apparatus and subject;
Focal length acquisition module, for, after described filming apparatus completes focusing, obtaining focal length;
Image distance calculates module, determines image distance for the distance between the camera lens according to described filming apparatus and subject and described focal length, and described image distance is the distance between the picture of subject one-tenth and described camera lens;
Contracting is put than acquisition module, and in the preview interface obtaining described filming apparatus, ratio is put in the contracting of the photo of the subject of current display;
Substantial proportion determination module, for the distance put according to described contracting between the camera lens of ratio, described image distance and described filming apparatus and subject, it is determined that the substantial proportion information of described photo and subject;
Display module, for by described substantial proportion information displaying in described preview interface.
7. shooting preview system according to claim 6, it is characterised in that, described object distance acquisition module comprises:
Laser ranging control module, for when described filming apparatus is focused, opening the laser range sensor of described filming apparatus;
Data sink module, receives the distance between the camera lens of the described filming apparatus that described laser range sensor reports and described subject.
8. shooting preview system according to claim 7, it is characterised in that, after described filming apparatus completes focusing, described laser ranging control module closes described laser range sensor.
9. shooting preview system according to any one of claim 6 to 8, it is characterised in that, described contracting is put and is comprised than acquisition module:
Height acquisition module, obtains the height of photo and the height of former of the subject of current display in described preview interface;
According to the height of the height of the photo of the subject of described current display and described former, pantagraph calculating module, determines that ratio is put in described contracting.
10. shooting preview system according to any one of claim 6 to 8, it is characterised in that, also comprise reminding module, for when the substantial proportion information of described photo and subject is preset ratio information, generating information.
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| CN201510998993.0A CN105635570B (en) | 2015-12-24 | 2015-12-24 | Shooting preview method and system |
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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 |
| CN109769091A (en) * | 2019-02-22 | 2019-05-17 | 维沃移动通信有限公司 | A kind of image capturing 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 |
| CN111770275A (en) * | 2020-07-02 | 2020-10-13 | 维沃移动通信有限公司 | Shooting method and device, electronic equipment and readable storage medium |
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| CN111770275A (en) * | 2020-07-02 | 2020-10-13 | 维沃移动通信有限公司 | Shooting method and device, electronic equipment and readable storage medium |
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