CN107864341A - One kind drop frame per second photographic method, mobile terminal and storage medium - Google Patents
One kind drop frame per second photographic method, mobile terminal and storage medium Download PDFInfo
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- CN107864341A CN107864341A CN201711476901.8A CN201711476901A CN107864341A CN 107864341 A CN107864341 A CN 107864341A CN 201711476901 A CN201711476901 A CN 201711476901A CN 107864341 A CN107864341 A CN 107864341A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000035945 sensitivity Effects 0.000 claims description 13
- 230000004048 modification Effects 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Classifications
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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
- H04N23/80—Camera processing pipelines; Components thereof
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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
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image 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
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/951—Computational photography systems, e.g. light-field imaging systems by using two or more images to influence resolution, frame rate or aspect ratio
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Abstract
The invention discloses one kind drop frame per second photographic method, mobile terminal and storage medium, methods described to include：The preview frame per second of current environment, and the exposure information of each frame data of real-time collecting are obtained by camera preview；According to the exposure information and preview frame per second judge current photo environment whether be predetermined value low luminous environment；When determining the low luminous environment that current photo environment is predetermined value, exposure parameter, and the frame data according to corresponding to exposure parameter output are changed according to preset algorithm；The selection time for exposure meets the frame data of predetermined value, and passes through selected frame data output image.The present invention, with original camera outputting high quality photo, solves the problems, such as that image definition difference and noise are more under low luminous environment, improve the quality of photo by way of dynamic reduces frame per second from source, convenient for users.
Description
Technical field
The present invention relates to technical field of mobile terminals, and in particular to one kind drop frame per second photographic method, mobile terminal and storage
Medium.
Background technology
Android operation system is a kind of intelligent mobile terminal operating system that Google releases, in recent years, with movement
The development of the technology such as terminal hardware and software, the camera applications of mobile terminal become more and more extensive；But under the environment of low light,
Especially when night scene, due to the limitation of mobile terminal hardware limitation in itself and the illumination factor of environment, shooting
When, it may appear that the phenomenon more than image definition difference and noise.
Therefore, improve quality of being taken pictures under low light and seem especially important for a user；In the current technology, although can
To improve photographic quality by multiframe composite software technology, but due to the image quality of original camera output itself
Low, the mode that software algorithm is corrected can not obtain good effect, hardly result in the picture of high quality.
Therefore, prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided one kind drop frame per second is taken pictures
Method, mobile terminal and storage medium, it is intended to by way of dynamic reduces frame per second, shone with original camera outputting high quality
Piece, solve the problems, such as that image definition difference and noise are more under low luminous environment, improve the quality of photo, facilitate user from source
Use.
The technical proposal for solving the technical problem of the invention is as follows：
One kind drop frame per second photographic method, wherein, the drop frame per second photographic method includes：
The preview frame per second of current environment, and the exposure information of each frame data of real-time collecting are obtained by camera preview；
According to the exposure information and preview frame per second judge current photo environment whether be predetermined value low luminous environment；
When determining the low luminous environment that current photo environment is predetermined value, according to preset algorithm modification exposure parameter, and according to
Frame data corresponding to the exposure parameter output；
The selection time for exposure meets the frame data of predetermined value, and passes through selected frame data output image.
Further, described drop frame per second photographic method, wherein, the preview that current environment is obtained by camera preview
Frame per second, and the exposure information of each frame data of real-time collecting specifically includes following steps：
The preview frame per second of current environment is obtained by camera preview；
The exposure information of each frame data of real-time collecting, it is steady that the exposure information includes exposure time, sensitivity value and exposure
Qualitative mark.
Further, described drop frame per second photographic method, wherein, the predetermined value for judging the low luminous environment is：
Exposure time is more than 1/17 second；
Sensitivity value is more than 1200 degree；
Preset frame rate is less than 15 frames；
And if only if exposure time is more than 1/17 second, sensitivity value is more than 1200 degree, preset frame rate is when being less than 15 frame, then judgement ought
Preceding photo environment is low luminous environment.
Further, described drop frame per second photographic method, wherein, it is non-low luminous environment when determining current photo environment
When, then continue common exposal model.
Further, described drop frame per second photographic method, wherein, it is described to determine current photo environment as predetermined value
During low luminous environment, exposure parameter is changed according to preset algorithm, and the frame data according to corresponding to exposure parameter output specifically wrap
Include following steps：
When determine current photo environment be predetermined value low luminous environment when, obtain present frame exposure time, exposure line number and
Exposure gain；
The drop frame factor is calculated according to the exposure time of present frame；
According to the drop frame factor modification exposure line number and exposure gain, and line number and exposure gain are exposed by amended
It is applied to camera；
The camera shoots photo, and the frame number of photo captured by output according to amended exposure line number and exposure gain
According to.
Further, described drop frame per second photographic method, wherein, the drop frame factor, amended exposure parameter and
Amended exposure gain meets following relation：
The frame factor drops in amended exposure line number=current exposure line number *；
Exposure gain/drop frame factor of amended exposure gain=current；
The drop frame factor is default number 4；
When current frame rate divided by default number 4 are less than 4, then the drop frame factor is adjusted to current frame rate divided by 4 value, it is no
Then the drop frame factor is default number 4.
Further, described drop frame per second photographic method, wherein, the selection time for exposure meets the frame number of predetermined value
According to, and following steps are specifically included by selected frame data output image：
All frame data of shooting are obtained, and whether the time for exposure for detecting each frame data meets predetermined value；
When the time for exposure for detecting frame data meeting predetermined value, the frame data, and output image are selected.
Further, described drop frame per second photographic method, wherein, the predetermined value of the time for exposure is 1/4 second.
A kind of mobile terminal, wherein, including processor, and the memory being connected with the processor, the memory
It is stored with drop frame per second to take pictures program, drop frame per second program of taking pictures is used to realize that the drop frame per second to be clapped during the computing device
According to method.
A kind of storage medium, wherein, the storage medium is stored with drop frame per second and taken pictures program, and the drop frame per second is taken pictures program
It is used to realize the drop frame per second photographic method when being executed by processor.
The invention provides one kind drop frame per second photographic method, mobile terminal and storage medium, methods described to include：Pass through phase
Machine preview obtains the preview frame per second of current environment, and the exposure information of each frame data of real-time collecting；According to the exposure information
With preview frame per second judge current photo environment whether be predetermined value low luminous environment；It is predetermined value when determining current photo environment
Low luminous environment when, according to preset algorithm change exposure parameter, and according to the exposure parameter output corresponding to frame data；Selection
Time for exposure meets the frame data of predetermined value, and passes through selected frame data output image.The present invention is reduced by dynamic
The mode of frame per second, with original camera outputting high quality photo, solves the image definition under low luminous environment from source
The problem of difference and noise are more, improve the quality of photo, convenient for users.
Brief description of the drawings
Fig. 1 is a kind of flow chart for the first preferred embodiment for dropping frame per second photographic method of the present invention.
Fig. 2 is mobile terminal preferred embodiment functional schematic block diagram of the present invention.
Embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Embodiment one
Fig. 1 is referred to, Fig. 1 is the flow chart of the first preferred embodiment of present invention drop frame per second photographic method.As shown in figure 1, one
Kind drop frame per second photographic method, wherein, comprise the following steps：
Step S100, the preview frame per second of current environment, and the exposure letter of each frame data of real-time collecting are obtained by camera preview
Breath.
In the embodiment of the present invention, in the preview readjustment thread of mobile terminal, the data of each frame are all fed back by metadata,
The exposure information of needs is contained in feedback information；When the exposure information of feedback is stable, mobile terminal enters the exposure information
Row storage；The exposure information includes exposure time, sensitivity value and exposure stability mark；When exposure information is unstable,
Then empty exposure information；Meanwhile when obtaining exposure information, it is also necessary to collect frame per second information, and exposure information and frame per second are believed
Breath storage packet corresponding to.
Further, the exposure information includes：
1）Exposure time：The exposure time of this current frame data；
2）Sensitivity value：The sensitivity value of this current frame data；
3）Exposure stability marks：Represent that exposure comes into stable state, all data do not have deviation, and camera is correct
Detect current brightness value.
I.e. specifically, step S100 specifically comprises the following steps：
S101, the preview frame per second of current environment is obtained by camera preview；
S102, the exposure information of each frame data of real-time collecting, the exposure information include exposure time, sensitivity value and exposure
Photostability marks.
Step S200, according to the exposure information and preview frame per second judge current photo environment whether be predetermined value low light
Environment.
In the embodiment of the present invention, in the thread of taking pictures of mobile terminal, when receive user take pictures request when, it is necessary to from
Exposure time, sensitivity value, exposure stability mark and current frame rate are obtained in the exposure information of storage；Only exposed in system
When stable, the requirement for meeting low luminous environment can be just further determined whether.
Further, according to the exposure information and preview frame per second judge current photo environment whether be predetermined value low light
Environment, the predetermined value for judging the low luminous environment are：
Exposure time is more than 1/17 second；
Sensitivity value is more than 1200 degree；
Preset frame rate is less than 15 frames；
Further, and if only if, and exposure time is less than 15 frames more than 1/17 second, sensitivity value more than 1200 degree, preset frame rate
When, then current photo environment is judged for low luminous environment, and now, control camera enters drop frame exposal model.
Further, when above three Rule of judgment have one do not meet when, it is impossible to it is low luminous environment to judge current environment, i.e.,
Current environment is non-low luminous environment, and now, control camera continues common exposal model.
Step S300, when determining the low luminous environment that current photo environment is predetermined value, changed and exposed according to preset algorithm
Optical parameter, and the frame data according to corresponding to exposure parameter output.
In the embodiment of the present invention, the main task of the drop frame pattern under low luminous environment is to calculate suitable exposure parameter simultaneously
It is applied in camera, that is, the method for changing exposure information, time of camera prolonged exposure is allowed, at the same time, in order to ensure
The brightness value of exposure is constant, it is necessary to which the gain for adjusting exposure is balanced with reaching exposure.
Further, when carrying out reducing frame per second modification exposure information, it is necessary to follow the steps below：
1）Obtain current exposure information：
Exposure time of the exposure information for present frame, exposure line number and exposure gain, during by the exposure that obtains present frame
Long, exposure line number and exposure gain, exposure time, exposure line number and the exposure gain of present frame are changed, taken pictures with reaching drop frame
Purpose.
2）Calculate the drop frame factor：
The drop frame factor is the range value of drop frame, and it has a default value（Default value is 4）, but when actual photographed,
The situation according to current exposure is needed, recalculates the drop frame factor, it is therefore an objective to the amplitude for dropping frame is controlled in certain scope,
To reach a balance between shooting and picture quality.
Calculation is：Current exposure time is subjected to drop frame, to ensure exposure time within 1/4 second.Current
Exposure time when having exceeded 1/4 second, the adjustment drop frame factor, to ensure final exposure time as 1/4 second；In current exposure
When duration was not less than 1/4 second, the drop frame factor of acquiescence is used；An acquiescence drop frame factor value is first set to be equal to " 4 ", if
The drop frame factor of current frame rate divided by acquiescence, the numerical value drawn are less than 4, then will drop the frame factor and be adjusted to current frame rate divided by 4
Value；Otherwise just using the drop frame factor of acquiescence.
3）Modification exposure line number and exposure gain：
Result of calculation by dropping the frame factor recalculates exposure line number and exposure gain, the exposure line number and exposure gain
Calculation is：
The frame factor drops in amended exposure line number=current exposure line number *；
Exposure gain/drop frame factor of amended exposure gain=current；
The drop frame factor is default number 4；
When current frame rate divided by default number 4 are less than 4, then the drop frame factor is adjusted to current frame rate divided by 4 value, it is no
Then the drop frame factor is default number 4.
The exposure line number and exposure gain that finally will newly calculate, are applied in camera by way of parameter setting
（Typically in register corresponding to write-in）.
I.e. specifically, step S300 comprises the following steps：
S301, when determining the low luminous environment that current photo environment is predetermined value, obtain exposure time, the exposure row of present frame
Number and exposure gain；
S302, the drop frame factor is calculated according to the exposure time of present frame；
S303, according to the drop frame factor modification exposure line number and exposure gain, and line number and exposure are exposed by amended
The gain of light is applied to camera；
S304, the camera shoot photo, and photo captured by output according to amended exposure line number and exposure gain
Frame data.
Step S400, select the time for exposure to meet the frame data of predetermined value, and figure is exported by selected frame data
Picture.
In the embodiment of the present invention, the purpose that selection is carried out to captured data frame is exactly to choose caused by drop frame pattern
Frame data, with reference to the actual conditions of android system, the view data come out from camera can be buffered to the team of regular length
In in, when shooting, can directly from this queue getting frame data output, here it is the image of a secondary shooting；Low
When photo-beat is taken the photograph, it is applied to after changing exposure parameter in camera, then camera applies these amended exposure parameters
Exposure is performed, finally image data buffer into queue；This entire work flow once needs the regular hour, and in this phase
Between, the frame data after new and old exposure parameter application are had in queue and are existed, it is therefore desirable to differentiates these frame data, and chooses effectively
Frame data.
Further, when camera enters low smooth exposal model, while also data frame queue has been done and once emptied,
To ensure that the data frame got from queue is identical；When selecting frame data, corresponding option program
Frame data are obtained from the head of frame data queue, then the exposure time of this frame data are detected, if exposure time is expired
Numerical value expected from foot, it has been the data after frame rate reduction processing to illustrate this frame data, that is, is considered as effective frame, then
It is taken as the image output of shooting；Otherwise with regard to the data of acquisition next frame in frame queue, this operation is repeated, until having got
Untill imitating frame.
I.e. specifically, step S400 comprises the following steps：
S401, obtains all frame data of shooting, and whether the time for exposure for detecting each frame data meets predetermined value；
S402, when the time for exposure for detecting frame data meeting predetermined value, select the frame data, and output image.
Certainly, one of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method,
It is that can instruct related hardware by dropping program that frame per second takes pictures（Such as processor, controller etc.）To complete, described program
It can be stored in a computer-readable storage medium, the program may include such as the stream of above-mentioned each method embodiment upon execution
Journey.Wherein described storage medium can be memory, magnetic disc, CD etc..
Embodiment two
The embodiment of the present invention additionally provides a kind of mobile terminal, as shown in Fig. 2 the mobile terminal of the embodiment of the present invention can be hand
Machine（Or tablet personal computer）, wherein, the mobile terminal of the present embodiment includes processor 10, and be connected with the processor 10
Memory 20；
The memory 20 is stored with drop frame per second and taken pictures program, and the drop frame per second, which is taken pictures when program is performed by the processor 10, to be used for
Realize the drop frame per second photographic method；As detailed above.
Embodiment three
A kind of storage medium, wherein, the storage medium is stored with drop frame per second and taken pictures program, and drop frame per second program of taking pictures is processed
It is used to realize the drop frame per second photographic method when device 10 performs；As detailed above.
In summary, the invention discloses one kind drop frame per second photographic method, mobile terminal and storage medium, methods described bag
Include：The preview frame per second of current environment, and the exposure information of each frame data of real-time collecting are obtained by camera preview；According to described
Exposure information and preview frame per second judge current photo environment whether be predetermined value low luminous environment；When determining current photo environment
For predetermined value low luminous environment when, according to preset algorithm change exposure parameter, and according to the exposure parameter output corresponding to frame
Data；The selection time for exposure meets the frame data of predetermined value, and passes through selected frame data output image.The present invention passes through
Dynamic reduces the mode of frame per second, with original camera outputting high quality photo, solves from source and is shone under low luminous environment
The problem of piece poor definition and more noise, the quality of photo is improved, it is convenient for users.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (10)
1. one kind drop frame per second photographic method, it is characterised in that the drop frame per second photographic method includes：
The preview frame per second of current environment, and the exposure information of each frame data of real-time collecting are obtained by camera preview；
According to the exposure information and preview frame per second judge current photo environment whether be predetermined value low luminous environment；
When determining the low luminous environment that current photo environment is predetermined value, according to preset algorithm modification exposure parameter, and according to
Frame data corresponding to the exposure parameter output；
The selection time for exposure meets the frame data of predetermined value, and passes through selected frame data output image.
2. drop frame per second photographic method according to claim 1, it is characterised in that described obtained by camera preview works as front ring
The preview frame per second in border, and the exposure information of each frame data of real-time collecting specifically includes following steps：
The preview frame per second of current environment is obtained by camera preview；
The exposure information of each frame data of real-time collecting, it is steady that the exposure information includes exposure time, sensitivity value and exposure
Qualitative mark.
3. drop frame per second photographic method according to claim 1, it is characterised in that judge the predetermined value of the low luminous environment
For：
Exposure time is more than 1/17 second；
Sensitivity value is more than 1200 degree；
Preset frame rate is less than 15 frames；
And if only if exposure time is more than 1/17 second, sensitivity value is more than 1200 degree, preset frame rate is when being less than 15 frame, then judgement ought
Preceding photo environment is low luminous environment.
4. drop frame per second photographic method according to claim 3, it is characterised in that when determining current photo environment to be non-low
During luminous environment, then continue common exposal model.
5. drop frame per second photographic method according to claim 1, it is characterised in that described to be when determining current photo environment
During the low luminous environment of predetermined value, exposure parameter, and the frame number according to corresponding to exposure parameter output are changed according to preset algorithm
According to specifically including following steps：
When determine current photo environment be predetermined value low luminous environment when, obtain present frame exposure time, exposure line number and
Exposure gain；
The drop frame factor is calculated according to the exposure time of present frame；
According to the drop frame factor modification exposure line number and exposure gain, and line number and exposure gain are exposed by amended
It is applied to camera；
The camera shoots photo, and the frame number of photo captured by output according to amended exposure line number and exposure gain
According to.
6. drop frame per second photographic method according to claim 5, it is characterised in that the drop frame factor, amended exposure
Parameter and amended exposure gain meet following relation：
The frame factor drops in amended exposure line number=current exposure line number *；
Exposure gain/drop frame factor of amended exposure gain=current；
The drop frame factor is default number 4；
When current frame rate divided by default number 4 are less than 4, then the drop frame factor is adjusted to current frame rate divided by 4 value, it is no
Then the drop frame factor is default number 4.
7. drop frame per second photographic method according to claim 1, it is characterised in that the selection time for exposure meets predetermined number
The frame data of value, and following steps are specifically included by selected frame data output image：
All frame data of shooting are obtained, and whether the time for exposure for detecting each frame data meets predetermined value；
When the time for exposure for detecting frame data meeting predetermined value, the frame data, and output image are selected.
8. drop frame per second photographic method according to claim 7, it is characterised in that the predetermined value of the time for exposure is 1/
4 seconds.
A kind of 9. mobile terminal, it is characterised in that including processor, and the memory being connected with the processor, it is described to deposit
Reservoir is stored with drop frame per second and taken pictures program, and drop frame per second program of taking pictures is used to realize claim during the computing device
Any one of 1-8 drop frame per second photographic methods.
10. a kind of storage medium, it is characterised in that the storage medium is stored with drop frame per second and taken pictures program, and the drop frame per second is clapped
It is used to realize any one of the claim 1-8 drop frame per second photographic methods when being executed by processor according to program.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476901.8A CN107864341A (en) | 2017-12-29 | 2017-12-29 | One kind drop frame per second photographic method, mobile terminal and storage medium |
| PCT/CN2018/123996 WO2019129092A1 (en) | 2017-12-29 | 2018-12-26 | Frame rate-lowered photographing method, mobile terminal and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711476901.8A CN107864341A (en) | 2017-12-29 | 2017-12-29 | One kind drop frame per second photographic method, mobile terminal and storage medium |
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| WO (1) | WO2019129092A1 (en) |
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| WO2019129092A1 (en) * | 2017-12-29 | 2019-07-04 | 捷开通讯(深圳)有限公司 | Frame rate-lowered photographing method, mobile terminal and storage medium |
| CN109005369A (en) * | 2018-10-22 | 2018-12-14 | Oppo广东移动通信有限公司 | Exposal control method, device, electronic equipment and computer readable storage medium |
| CN109005369B (en) * | 2018-10-22 | 2020-07-10 | Oppo广东移动通信有限公司 | Exposure control method, exposure control device, electronic apparatus, and computer-readable storage medium |
| CN111385484A (en) * | 2018-12-28 | 2020-07-07 | 北京字节跳动网络技术有限公司 | Information processing method and device |
| CN110072052A (en) * | 2019-04-09 | 2019-07-30 | Oppo广东移动通信有限公司 | Image processing method, device, electronic equipment based on multiple image |
| CN110753189A (en) * | 2019-12-25 | 2020-02-04 | 武汉精立电子技术有限公司 | Camera image capturing method and system |
| WO2024021057A1 (en) * | 2022-07-29 | 2024-02-01 | Qualcomm Incorporated | Dynamic image sensor configuration for improved image stabilization in an image capture device |
| CN118075617A (en) * | 2024-04-22 | 2024-05-24 | 杭州涂鸦信息技术有限公司 | Image exposure method, device, electronic equipment and storage medium |
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