CN108900782A - Exposal control method, device and electronic equipment - Google Patents
Exposal control method, device and electronic equipment Download PDFInfo
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- CN108900782A CN108900782A CN201810963320.5A CN201810963320A CN108900782A CN 108900782 A CN108900782 A CN 108900782A CN 201810963320 A CN201810963320 A CN 201810963320A CN 108900782 A CN108900782 A CN 108900782A
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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
- H04N23/71—Circuitry for evaluating the brightness variation
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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
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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Abstract
The application proposes a kind of exposal control method, device, electronic equipment and computer readable storage medium, wherein method includes：By surveying light with the target light exposure amount of each frame of determination image to be collected；According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine the exposure time of each frame image to be collected, if the exposure time of at least frame image to be collected is less than duration lower limit, according to duration lower limit, update the exposure time of at least frame image to be collected, finally according to the exposure time and sensitivity of each frame image to be collected, it is exposed control.Dynamic range and overall brightness that night scene shoots image are not only improved as a result, it is suppressed that the noise in image, and inhibit ghost caused by hand-held shake and obscure, the quality of night scene shooting image is improved, user experience is improved.
Description
Technical field
This application involves technical field of imaging more particularly to a kind of exposal control methods, device and electronic equipment.
Background technique
With the development of intelligent terminal technology, the use of mobile terminal device (such as smart phone, tablet computer) is more next
It is more universal.Most mobile terminal devices are all built-in with camera, and with the enhancing of mobile terminal processing capacity and
The performance of the development of camera technology, built-in camera is stronger and stronger, and the quality for shooting image is also higher and higher.Nowadays, it moves
Dynamic terminal device is easy to operate and easy to carry, and more and more users use smart phone, plate electricity in daily life
The mobile terminal devices such as brain are taken pictures.
Intelligent mobile terminal to people it is daily take pictures bring convenient while, people want to the picture quality of shooting
Ask also higher and higher.However, people do not know that how suitable shooting is arranged according to photographed scene joins since professional standards limit
Number, therefore is difficult to take good image as mm professional camera special effect, especially in this special screne of night scene, picture quality compared with
It is low.
Summary of the invention
The application is intended to solve at least some of the technical problems in related technologies.
For this purpose, the application proposes a kind of exposal control method, device electronic equipment and computer readable storage medium, with
It solves in the related technology, in the partially bright night scene scene of shooting picture, leads to the dynamic range of images of shooting due to surveying light fault
And surrounding brightness is low, noise level is high, the technical issues of influencing user experience.
The application one side embodiment proposes a kind of exposal control method, including：
Light is surveyed with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine that each frame waits for
Acquire the exposure time of image；
If the exposure time of at least frame image to be collected is less than duration lower limit, according to the duration lower limit, described in update
The exposure time of at least frame image to be collected；
According to the exposure time and sensitivity of each frame image to be collected, it is exposed control.
The exposal control method of the embodiment of the present application, by surveying light with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, each frame image to be collected is determined
Exposure time according to duration lower limit, update at least one if the exposure time of at least frame image to be collected is less than duration lower limit
The exposure time of frame image to be collected is exposed control finally according to the exposure time and sensitivity of each frame image to be collected.
As a result, by according to the degree of jitter of imaging device and the environmental light brightness of present filming scene, it is determined that each frame figure to be collected
The exposure time of picture, so according to duration lower limit update at least frame image to be collected exposure time, finally according to update after
Each frame image to be collected exposure time and sensitivity, be exposed control, and then be imaged, not only improve night scene shooting mould
The dynamic range and overall brightness that image is shot under formula effectively inhibit the noise in shooting image, improve night scene shooting figure
The quality of picture, improves user experience.
The another aspect embodiment of the application proposes a kind of exposure-control device, including：
Optical module is surveyed, for surveying light with the target light exposure amount of each frame of determination image to be collected；
Determining module, for preset photosensitive according to the target light exposure amount and each frame image to be collected of each frame image to be collected
Degree, determines the exposure time of each frame image to be collected；
Update module, if the exposure time at least frame image to be collected is less than duration lower limit, according to the duration
Lower limit updates the exposure time of at least frame image to be collected；
Control module is exposed control for the exposure time and sensitivity according to each frame image to be collected.
The exposure-control device of the embodiment of the present application, by surveying light with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, each frame image to be collected is determined
Exposure time according to duration lower limit, update at least one if the exposure time of at least frame image to be collected is less than duration lower limit
The exposure time of frame image to be collected is exposed control finally according to the exposure time and sensitivity of each frame image to be collected.
As a result, by according to the degree of jitter of imaging device and the environmental light brightness of present filming scene, it is determined that each frame figure to be collected
The exposure time of picture, so according to duration lower limit update at least frame image to be collected exposure time, finally according to update after
Each frame image to be collected exposure time and sensitivity, be exposed control, and then be imaged, not only improve night scene shooting mould
The dynamic range and overall brightness that image is shot under formula effectively inhibit the noise in shooting image, improve night scene shooting figure
The quality of picture, improves user experience.
The another aspect embodiment of the application proposes one or more non-volatile meters comprising computer executable instructions
Calculation machine readable storage medium storing program for executing, is stored thereon with computer program, which is characterized in that realizes when the program is executed by processor as above
State exposal control method described in embodiment.
The another aspect embodiment of the application proposes a kind of electronic equipment, including memory and processor, the memory
In store computer-readable instruction, when the processor executes described program, realize the exposure control as described in above-described embodiment
Method processed.
The additional aspect of the application and advantage will be set forth in part in the description, and will partially become from the following description
It obtains obviously, or recognized by the practice of the application.
Detailed description of the invention
The application is above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is a kind of flow diagram of exposal control method provided by the embodiment of the present application；
Fig. 2 is a kind of process for determining the preset exposure bias value of each frame image to be collected provided by the embodiment of the present application
Schematic diagram；
Fig. 3 is the flow diagram of another kind exposal control method provided by the embodiment of the present application；
Fig. 4 is a kind of structural schematic diagram of exposure-control device provided by the embodiment of the present application；
Fig. 5 is the module diagram of the electronic equipment of the application certain embodiments；
Fig. 6 is the module diagram of the image processing circuit of the application certain embodiments.
Specific embodiment
Embodiments herein is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the application, and should not be understood as the limitation to the application.
The relevant technologies are in night scene photographed scene, since illumination condition is poor, in order to improve shooting quality, in shooting process
In, shooting main body is placed on picture middle position by people's habit, carries out long exposure, middle exposure and short exposure respectively, then will be different
Exposure under obtain image synthesis after export imaging, to improve the imaging effect of image.But this style of shooting is at night
Under scape photographed scene, the dynamic range of images shot is not wide enough, and the overall brightness of image is also relatively low, in shooting process
Noise may be introduced.
The embodiment of the present application is directed in the related technology, when shooting image in night scene scene, when photographed scene intermediate range
Cause to survey light fault when brighter, so that the dynamic range for the image that shooting obtains and the brightness of surrounding dark space are all lower, noise
The problem of level is high, influences user experience, proposes a kind of exposal control method.
Exposal control method provided by the embodiments of the present application, by surveying light with the target light exposure of each frame of determination image to be collected
Amount；According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine that each frame is to be collected
The exposure time of image, if the exposure time of at least frame image to be collected is less than duration lower limit and is updated to according to duration lower limit
The exposure time of few frame image to be collected is exposed finally according to the exposure time and sensitivity of each frame image to be collected
Control.
Below with reference to the accompanying drawings the exposal control method and device of the embodiment of the present application are described.
Fig. 1 is a kind of flow diagram of exposal control method provided by the embodiment of the present application.
The exposal control method of the embodiment of the present application, is applied to electronic equipment, which can be mobile phone, plate electricity
Brain, personal digital assistant, wearable device etc. have the hardware device of various operating systems, imaging device.
As shown in Figure 1, the exposal control method includes the following steps：
Step 101, light is surveyed with the target light exposure amount of each frame of determination image to be collected.
Wherein, light exposure refers to that the sensor devices in imaging device receive the number of light, light exposure in exposure time
It is related with aperture, exposure time and sensitivity.Wherein, aperture i.e. clear aperture, light passes through in the decision unit time
Quantity；Exposure time refers to time of the light by camera lens；Sensitivity, also known as ISO value are the spirits for measuring egative film for light
The index of quick degree, for indicating the film speed of photosensitive element, the more high photosensitive energy for just illustrating the sensitive component of ISO numerical value
Power is stronger.
It should be noted that needing to expose the longer time when the sensitivity of imaging device is lower to reach with photosensitive
Identical imaging effect when spending higher.The sensitivity of digital camera is a kind of a kind of index similar to film speed, digital
The ISO value of camera can by adjusting sensor devices sensitivity or merge sensitivity speck and adjust, that is to say, that can pass through
It promotes the light sensitivity of sensor devices or merges several adjacent sensitivity specks to achieve the purpose that promote ISO value.Certainly, it is
The reduction time for exposure, more noise would generally be introduced using relatively high sensitivity, to will lead to picture quality drop
It is low.Therefore, under night scene scene, preferable noise suppression effect in order to obtain, it is desirable to lower sensitivity is set, such as
100ISO or 200ISO etc., simultaneously as the aperture of the electronic equipments such as mobile phone generallys use fixed value, to need to correspondingly increase
Exposure time, i.e. shutter duration.
Specifically, the preview image of present filming scene is obtained by imaging device, it is further to be surveyed by sensor devices
The environmental light brightness in each region of preview image is measured, and then according to the luminance information of preview image, determines benchmark light exposure.Its
In, in the case where aperture is fixed, benchmark light exposure can specifically include benchmark exposure time and benchmark sensitivity.
In the embodiment of the present application, benchmark light exposure refers to by survey the current environment that light obtains to preview image
Luminance information, the light exposure adaptable with current environment luminance information that be determining, the value of benchmark light exposure can be benchmark
Product between sensitivity and benchmark exposure time.
Wherein, benchmark sensitivity, can be the degree of jitter current according to imaging device, determining with current shake journey
The adaptable sensitivity of degree can also be the sensitivity obtained by surveying light, be not construed as limiting in the present embodiment to this.It is understood that
, since light exposure and sensitivity influence whether whole shooting duration of video, shooting duration of video is too long, may result in hand-held shooting
When imaging device degree of jitter aggravation, to influence picture quality.Therefore, in the degree of jitter current according to imaging device,
When determining benchmark sensitivity, it should make shooting duration of video control in suitable range.
It specifically,, can when the size of aperture is fixed since light exposure is related with aperture, exposure time and sensitivity
According to benchmark light exposure and benchmark sensitivity, benchmark exposure time is determined.Using benchmark exposure time as EV0, according to each
The preset exposure bias value of frame image to be collected, it may be determined that the target light exposure amount of each frame image to be collected.
Wherein, preset exposure bias value refers to the preset exposure of environmental light brightness according to present filming scene
It is worth (Exposure Value, EV).In the initial definition of exposure value, exposure value does not imply that an accurate numerical value, but
Refer to " all camera apertures and the combination of exposure time that unified light exposure can be provided ".Sensitivity, aperture and exposure time
It has been determined that the light exposure of camera, different parameter combinations can produce equal light exposure, i.e. the EV value of these various combinations is
It is the same, for example, combine in the identical situation of sensitivity using the aperture of 1/125 second exposure time and f11, and use 1/
The combination of 250 second time for exposure and f8 shutter, the light exposure of acquisition be it is identical, i.e., EV value is identical.When EV value is 0, it is
Refer to the light exposure obtained when sensitivity is 100, aperture-coefficient f1, exposure time are 1 second；Light exposure increases by one grade, that is, exposes
Duration double perhaps sensitivity double or aperture increase by one grade, EV value increase by 1, that is to say, that EV1 is corresponding
Light exposure is twice of the corresponding light exposure of EV0.
As an example, if the luminance information for the preview image that imaging device is obtained according to measurement, determines that each frame waits for
The benchmark light exposure for acquiring image is 400, and benchmark sensitivity ISO value is 100 at this time, then benchmark exposure time is 4s.If each
The preset exposure bias value of frame image to be collected is EV+1, it may be determined that target light exposure amount at this time is 800.Wherein, EV+1
Exposure compensating refers to and increases by one grade of exposure relative to the corresponding light exposure of imaging device photometric data, i.e. actual exposure amount is to survey
Twice of the corresponding light exposure of light data.
It in the embodiment of the present application, can be pre- by the determining corresponding EV value of benchmark light exposure when presetting exposure bias value
It is set as 0, EV+1 and refers to one grade of exposure of increase, is i.e. light exposure is 2 times of benchmark light exposure, and EV+2 refers to two grades of exposures of increase, i.e.,
Light exposure is 4 times of benchmark light exposure, and EV-1 refers to one grade of exposure of reduction, i.e. light exposure is 0.5 times etc. of benchmark light exposure.
For example, if amount of images to be collected be 7 frames, corresponding default exposure bias value EV value can be [+1,
+1,+1,+1,0,-3,-6].Wherein, the frame that exposure bias value is EV+1 is preset, noise problem is can solve, is compared by brightness
High frame carries out time domain noise reduction, inhibits noise while promoting dark portion details；Default exposure bias value is the frame of EV-6, can be with
It solves the problems, such as bloom overexposure, retains the details of highlight area；The frame that default exposure bias value is EV0 and EV-3, then can use
In holding bloom to the transition between dark space, the effect of preferable light and shade transition is kept.
Step 102, according to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, really
The exposure time of fixed each frame image to be collected.
In the embodiment of the present application, as a kind of possible implementation, when the preset sensitivity phase of each frame image to be collected
Meanwhile the preset sensitivity of each frame image to be collected can be determined according to the environmental light brightness of photographed scene.In photographed scene light
Line is than improving sensitivity, the speed of shutter can be made to accelerate, to reduce float in the case where darker.
It can basis when the preset sensitivity of each frame image to be collected is identical as alternatively possible implementation
Degree of jitter determines the preset sensitivity of each frame image to be collected.
Specifically, in order to determine degree of jitter, displacement letter can be acquired according to the displacement sensor being arranged in imaging device
Breath, in turn, according to the displacement information of collected imaging device, determines the degree of jitter of imaging device.When trembling for imaging device
When traverse degree is greater than or equal to dithering threshold, determine that each preset sensitivity value of frame image to be collected is in present filming scene
First photosensitive value；When the degree of jitter of imaging device is less than dithering threshold, each frame figure to be collected in present filming scene is determined
As preset sensitivity value is the second photosensitive value.Wherein, dithering threshold is preset pre- for determining in imaging device
If the jitter value of sensitivity value.
Wherein, the first photosensitive value is greater than the second photosensitive value, and the first photosensitive value is the presupposition multiple of the second photosensitive value, presets again
Several values is more than or equal to 2.As a kind of possible implementation, in order to obtain lower noise, the second photosensitive value can be
The minimum sensitivity of imaging device, the i.e. value of the second photosensitive value are 100ISO, and correspondingly, the value range of the first photosensitive value can
Think 200,400,800 or higher.
Since light exposure is equal to sensitivity multiplied by exposure time, in the embodiment of the present application, according to each frame figure to be collected
The target light exposure amount and the preset sensitivity of each frame image to be collected of picture, can determine the exposure time of each frame image to be collected.
As an example, if the target light exposure amount for surveying the frame image to be collected that light determines is 800, the frame determined
The preset sensitivity of image to be collected is 400ISO, and the exposure time for acquiring the frame image at this time is then 2s.It, can by the method
Determine the exposure time of each frame image to be collected.
Step 103, it if the exposure time of at least frame image to be collected is less than duration lower limit, according to duration lower limit, updates
The exposure time of at least frame image to be collected.
Wherein, the duration lower limit of exposure time is greater than or equal to 10ms.Exposure time is measured within 10ms based on experiment
When, it may appear that the deterioration of noise, meanwhile, for some equipment there is also when settable minimum exposure the case where a length of 10ms,
Therefore, above situation setting duration lower limit is comprehensively considered here is greater than or equal to 10ms.
In the embodiment of the present application, when the exposure time of at least frame image to be collected is less than exposure time lower limit, at this point, will
The exposure time of at least frame image to be collected is set as duration lower limit.In turn, according to the mesh of at least frame image to be collected
The relationship for marking light exposure and duration lower limit and light exposure and sensitivity and exposure time, updates at least frame figure to be collected
The sensitivity of picture.And then according to exposure time lower limit, the exposure time of at least frame image to be collected is updated.
As an example, it is assumed that exposure time lower limit is 10ms, and the default sensitivity of each frame image to be collected is identical
For 100ISO, image to be collected is 4 frames, and preset exposure bias value EV value can be [- 6, -5, -4,0].If EV0 be 100ms,
100ISO, then when preset exposure bias value is EV-6, the exposure time of acquisition one frame image to be collected is 1.5ms, sensitivity
For 100ISO, the exposure time 1.5ms of the frame image is less than duration lower limit 10ms at this time, then by the exposure of frame image to be collected
Duration is set as duration lower limit 10ms, and then frame image sensitive degree value to be collected is 100ISO.As it can be seen that by waiting for the frame
The exposure time of acquisition image is updated, and has highlighted brightness of image, and the target light exposure amount of the frame is improved from 1.5ms × 100ISO
To 10ms × 100ISO, target light exposure amount is 20/3 times before updating.
Further, in order to enable each exposed frame transition is naturally, half-light region and light region can obtain preferably
Exposure, can also synchronize remaining each frame and highlight.Referring still to aforementioned exemplary, to EV-6 picture frame, target light exposure amount is more
20/3 times before new, remaining each frame target light exposure amount also synchronizes as 20/3 times before update.When can specifically be exposed by improving
It is long, or realized by improving ISO, this is not construed as limiting in the present embodiment.
Step 104, according to the exposure time and sensitivity of each frame image to be collected, it is exposed control.
In the embodiment of the present application, imaging device can be according to the exposure time of determining each frame image to be collected and photosensitive
Degree is exposed control, and then is imaged.
The exposal control method of the embodiment of the present application, by surveying light with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, each frame image to be collected is determined
Exposure time according to duration lower limit, update at least one if the exposure time of at least frame image to be collected is less than duration lower limit
The exposure time of frame image to be collected is exposed control finally according to the exposure time and sensitivity of each frame image to be collected.
As a result, by according to the degree of jitter of imaging device and the environmental light brightness of present filming scene, it is determined that each frame figure to be collected
The exposure time of picture, so according to duration lower limit update at least frame image to be collected exposure time, finally according to update after
Each frame image to be collected exposure time and sensitivity, be exposed control, and then be imaged, not only improve night scene shooting mould
The dynamic range and overall brightness of image are shot under formula, and effectively inhibits the noise in shooting image, improve night scene bat
The quality for taking the photograph image, improves user experience.
As a kind of possible implementation, in the embodiment of the present application, according to benchmark light exposure and each frame image to be collected
Preset exposure bias value before the target light exposure amount for determining each frame image to be collected, first has to determine each frame image to be collected
Preset exposure bias value can specifically include following steps referring to fig. 2：
Step 201, preview screen is obtained.
In the embodiment of the present application, the preview screen of present filming scene can be obtained by imaging device, is worked as determination
Whether preceding photographed scene belongs to night scene scene.
Step 202, according to the image content of preview screen, determine that present filming scene belongs to night scene scene.
Specifically, due to ambient brightness value difference under different scenes, preview screen content is not also identical, according to current shooting
The ambient brightness value in the image content of scene preview picture and each region, judges whether present filming scene belongs to night scene field
Scape.
For example, the image content of preview screen includes each area of night sky perhaps night scene lamp source etc. or preview screen
Ambient brightness value meets the Luminance Distribution characteristic of image under night scene environment in domain, that is, can determine that present filming scene belongs to night scene field
Scape.
Step 203, whether include face according to the degree of jitter of imaging device and/or preview screen, identify current shooting
The applicable night scene mode of scene.
In the embodiment of the present application, the displacement sensor that can be arranged by imaging device, collects imaging device and exists
Displacement information in shooting process, and then the current degree of jitter of imaging device is determined according to the displacement information of acquisition.As a result, may be used
Judge that user is that imaging device is fixed on foot prop to shoot or by hand-held by the degree of jitter of imaging device
Mode shooting.In turn, the degree of jitter current according to imaging device, the applicable night scene mode of identification present filming scene.
As an example, can by obtaining current gyroscope (Gyro-sensor) information of electronic equipment, determine at
As the current degree of jitter of equipment.
Wherein, gyroscope is called angular-rate sensor, can measure rotational angular velocity when physical quantity deflection, inclination.?
In imaging device, gyroscope can be very good the movement of measurement rotation, deflection, judge user's so as to Accurate Analysis
Actual act.The gyroscope information (gyro information) of electronic equipment may include imaging device three dimension sides in three dimensions
Upward motion information, three dimensions of three-dimensional space can be expressed as three X-axis, Y-axis, Z axis directions, wherein X-axis, Y
Axis, Z axis are vertical relation two-by-two.
As a result, in the embodiment of the present application, gyro information that can be current according to electronic equipment determines that imaging device is current
Degree of jitter.The absolute value of the gyro movement of electronic equipment in three directions is bigger, then the degree of jitter of imaging device is bigger.
Specifically, the absolute value threshold value of gyro movement in three directions can be preset, and current in three directions according to what is got
On gyro movement the sum of absolute value, the relationship with preset threshold value determines the current degree of jitter of imaging device.
As an example it is assumed that preset threshold value is first threshold A, second threshold B, third threshold value C, and A<B<C is currently obtained
The sum of absolute value for the movement of gyro in three directions got is S.If S<A, it is determined that the current degree of jitter of imaging device
For " non-jitter "；If A<S<B can then determine that the current degree of jitter of imaging device is " slight jitter "；If B<S<C then may be used
To determine the current degree of jitter of imaging device for " small shake "；If S>C can then determine the current degree of jitter of imaging device
For " big shake ".
It should be noted that the example above is exemplary only, the limitation to the application cannot be considered as.In actual use,
Can the quantity of preset threshold and each threshold value according to actual needs specific value, and the pass according to gyro information and each threshold value
System presets the mapping relations of gyro information and imaging device degree of jitter.
It enough can include face by determining the preview screen of imaging device to be as alternatively possible implementation, into
And identify the applicable night scene mode of present filming scene.
In the embodiment of the present application, whether preview screen includes that face can be determined by face recognition technology.Face is known
Other technology is to compare face visual signature information by analysis to carry out identity identification, it belongs to biometrics identification technology, is pair
The biological characteristic of organism (generally refering in particular to people) itself is individual to distinguish organism.Currently, face recognition technology has been supplied in crowd
In multi-field, for example, digital camera face auto-focusing and the fast gate technique of smiling face；Enterprise, house safety and management；Gate inhibition system
System；Shooting and monitoring system etc..Commonly face recognition algorithms include：Recognizer (Feature- based on human face characteristic point
Based recognition algorithms), the recognizer (Appearance-based based on whole picture facial image
Recognition algorithms), recognizer (the Template-based recognition based on template
Algorithms), algorithm (the Recognition algorithms using neural identified using neural network
Network) etc..
It should be noted that the survey optical module of imaging device can be automatically with people when detecting that preview screen includes face
Survey light is carried out based on face region, and benchmark light exposure is determined according to the photometry result of human face region.However, in night scene scene,
The illuminance of human face region is usually lower, so as to cause determining benchmark light exposure, exposes with the benchmark determined when not including face
Light quantity if still acquiring excessive overexposure frame when comprising face, is easy to cause human face region overexposure, to lead compared to higher
Cause the imaging effect of acquisition image poor.Therefore, for identical degree of jitter, in preview screen comprising face with do not include people
It is compared when face, the night scene mode of use is not identical.
Step 204, according to night scene mode, the preset exposure bias value of each frame image to be collected is determined.
As a kind of possible implementation, the degree of jitter of imaging device is different, is applicable in the night scene of present filming scene
Mode is not also identical, accordingly, it is determined that go out each frame it is to be collected the preset exposure bias value of image it is also not identical.In the application reality
It applies in example, the mapping relations between the degree of jitter of imaging device and exposure bias value can be preset, according to imaging device
Degree of jitter determines the preset exposure bias value of current each frame image to be collected.
For example, when can be " non-jitter " by the degree of jitter of imaging device, the corresponding exposure of each frame image to be collected
The EV value range of offset is preset as -6~2, and the difference between adjacent EV value is 0.5；By the degree of jitter of imaging device
EV value range for " slight jitter ", the corresponding exposure bias value of each frame image to be collected is preset as -5~1, and adjacent EV
Difference between value is 1, etc..
As alternatively possible way of realization, whether the preview screen for detecting imaging device includes face, preview screen
In comprising face with do not include face when, the night scene mode for being applicable in present filming scene is not identical, and each frame thereby determined that waits adopting
It is also not identical to collect the preset exposure bias value of image.
Whether identical degree of jitter can be wrapped according in preview screen as alternatively possible implementation
Containing face, determine each frame image to be collected using different exposure bias values.It therefore, can be right for identical degree of jitter
It should be in multiple exposure bias values.For example, the degree of jitter of imaging device is " slight jitter ", the preset exposure of each frame image to be collected
Light offset has comprising face and without two kinds of situations of face.
In night scene mode, when in image to be collected including face, the intensity of illumination of human face region is usually lower, thus
Lead to determining benchmark light exposure, it is higher compared with the benchmark light exposure determined when not including face, if when comprising face still
Excessive overexposure frame is so acquired, then is easy to cause human face region overexposure, the imaging effect so as to cause acquisition image is poor, right
The exposure compensation mode answered needs to have lower exposure compensating range.Therefore, for identical degree of jitter, in preview screen
Comprising face compared with when not including face, it is being determined whether the current degree of jitter of imaging device and preview screen wrap
After face, that is, it can determine that the preset exposure bias value being consistent with current actual conditions.
The exposal control method of the embodiment of the present application, by obtaining preview screen, according to the image content of preview screen, really
Determine present filming scene and belong to night scene scene, whether include face according to the degree of jitter of imaging device and/or preview screen, knows
The applicable night scene mode of other present filming scene according to night scene mode, determines that the preset exposure of each frame image to be collected is mended in turn
Repay value.Whether include as a result, face according to the degree of jitter of imaging device and/or preview screen, determines under the photographed scene
Night scene mode, and then determine the preset exposure bias value of each frame image to be collected, it is further for determining each frame figure to be collected
The exposure time of picture updates the exposure time of at least frame image to be collected according to duration lower limit, finally according to updated each
The exposure time and sensitivity of frame image to be collected are exposed control, and then are imaged, and not only improve under night scene screening-mode
The dynamic range and overall brightness of image are shot, and effectively inhibits the noise in shooting image, improves night scene shooting figure
The quality of picture, improves user experience.
For an embodiment in clear explanation, another exposal control method is present embodiments provided, Fig. 3 is that the application is real
Apply the flow diagram of another kind exposal control method provided by example.
As shown in figure 3, the exposal control method may comprise steps of：
Step 301, light is surveyed with the target light exposure amount of each frame of determination image to be collected.
Step 302, according to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, really
The exposure time of fixed each frame image to be collected.
Step 303, it if the exposure time of at least frame image to be collected is less than duration lower limit, according to duration lower limit, updates
The exposure time of at least frame image to be collected.
In the embodiment of the present application, the specific implementation process and principle of above-mentioned steps 301-303, such as the step in previous embodiment
Described in rapid 101-103, details are not described herein.
Step 304, the image to be collected of maximum time limit is greater than to exposure time, according to corresponding target light exposure amount and duration
The upper limit updates sensitivity；And according to maximum time limit, when updating the exposure for the image to be collected that exposure time is greater than maximum time limit
It is long.
Wherein, the exposure time upper limit is preset exposure time value.
Specifically, the image to be collected of maximum time limit is greater than for exposure time, the exposure time of image to be collected is set
Be set to maximum time limit, due to light exposure be sensitivity and exposure time product, according to corresponding target light exposure amount and when
The long upper limit updates ratio of the sensitivity of image to be collected between target light exposure amount and maximum time limit.
It should be noted that the exposure time of image to be collected be greater than maximum time limit when, if using the exposure time into
Row exposure, will lead to float since exposure time is too long, and exposure time is greater than to the image to be collected of maximum time limit
Exposure time be updated to maximum time limit.
Step 305, remaining each frame image to be collected of duration lower limit is greater than or equal to exposure time, according to ratio, more
The sensitivity of remaining new each frame image to be collected.
Specifically, remaining each frame image to be collected of duration lower limit is greater than or equal to for exposure time, it is first determined small
Ratio between exposure time after the image update to be collected of duration lower limit and the exposure time before update, then by the ratio
With the sensitivity or exposure time product before remaining each frame image update to be collected, after remaining each frame image update to be collected
Sensitivity or exposure time.
As an example, if the image to be collected that exposure time is greater than or equal to duration lower limit is 4 frames, according to imaging
The degree of jitter of equipment determines that the preset sensitivity value of each frame is 100ISO, and the exposure time of 4 frames image to be collected is distinguished
For 100ms, 200ms, 400ms and 800ms.In view of be less than duration lower limit image update to be collected after exposure time and update
Ratio between preceding exposure time is 10ms/1.5ms, i.e., 20/3, the exposure time of this 4 frame image to be collected is determined as a result,
20/3 times for expanding as original 100ms, 200ms, 400ms and 800ms.
It is similar to the update mode of sensitivity and the update mode of exposure time, it is only necessary to replace with exposure time photosensitive
Degree, but should be noted that only can according to after the aforementioned image update to be collected less than duration lower limit exposure time and
The ratio between exposure time before update updates one in exposure time and sensitivity, if desired to exposure time and sense
Luminosity updates simultaneously, then after needing to be allocated the ratio according to weight, is updated.Such as：To exposure time and sensitivity
Half weight is respectively accounted for, if the exposure time after the aforementioned image update to be collected less than duration lower limit and the exposure time before update
Between ratio be R, exposure time is expanded as into original R/2 times, sensitivity is expanded as into original R/2 times.
Step 306, according to the exposure time and sensitivity of each frame image to be collected, it is exposed control.
In the embodiment of the present application, imaging device can be according to the exposure time of determining each frame image to be collected and photosensitive
Degree is exposed control, and then is imaged.
The exposal control method of the embodiment of the present application, by surveying light with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, each frame image to be collected is determined
Exposure time according to duration lower limit, update at least one if the exposure time of at least frame image to be collected is less than duration lower limit
The exposure time of frame image to be collected；It is greater than the image to be collected of maximum time limit to exposure time, according to corresponding target light exposure
Amount and maximum time limit update sensitivity；And according to maximum time limit, update the image to be collected that exposure time is greater than maximum time limit
Exposure time be exposed control finally according to the exposure time and sensitivity of each frame image to be collected.Pass through root as a result,
According to the degree of jitter of imaging device and the environmental light brightness of present filming scene, it is determined that when the exposure of each frame image to be collected
It grows, and then updates the sensitivity of each frame image to be collected according to exposure time lower limit and maximum time limit, finally according to updated
The exposure time and sensitivity of each frame image to be collected are exposed control, and then are imaged, and not only improve night scene screening-mode
The dynamic range and overall brightness of lower shooting image, and the noise in shooting image is effectively inhibited, improve night scene shooting
The quality of image, improves user experience.
In order to realize above-described embodiment, the application also proposes a kind of exposure-control device.
Fig. 4 is a kind of structural schematic diagram of exposure-control device provided by the embodiments of the present application.
As shown in figure 4, the exposure-control device 100 includes：Survey optical module 110, determining module 120, update module 130 with
And control module 140.
Optical module 110 is surveyed, for surveying light with the target light exposure amount of each frame of determination image to be collected.
Determining module 120, for preset according to the target light exposure amount and each frame image to be collected of each frame image to be collected
Sensitivity determines the exposure time of each frame image to be collected.
Update module 130, if the exposure time at least frame image to be collected is less than duration lower limit, according under duration
Limit updates the exposure time of at least frame image to be collected.Wherein, duration lower limit is greater than or equal to 10ms.
Control module 140 is exposed control for the exposure time and sensitivity according to each frame image to be collected.
As alternatively possible implementation, which further includes：
First determining module, for determining preset sensitivity described in each frame image to be collected according to degree of jitter.
As alternatively possible implementation, the first determining module can also be specifically used for
The sensor being arranged from imaging device, obtains collected displacement information；
According to displacement information, the degree of jitter of imaging device is determined；
If degree of jitter is greater than or equal to dithering threshold, determine that preset sensitivity value is the first photosensitive value；
If degree of jitter is less than dithering threshold, determine that preset sensitivity value is the second photosensitive value；Wherein, first is photosensitive
Value is greater than the second photosensitive value.
Wherein, the first photosensitive value is the presupposition multiple of the second photosensitive value, and presupposition multiple value is more than or equal to 2；Second
Photosensitive value is the minimum sensitivity of imaging device.
As alternatively possible implementation, optical module 110 is surveyed, can also be specifically used for：
According to the luminance information of preview image, benchmark light exposure is determined；Benchmark light exposure includes benchmark exposure time and base
Quasi- sensitivity；
According to benchmark light exposure and the preset exposure bias value of each frame image to be collected, the mesh of each frame image to be collected is determined
Mark light exposure.
As alternatively possible implementation, optical module 110 is surveyed, further includes：
Acquiring unit, for obtaining preview screen.
First determination unit determines that present filming scene belongs to night scene scene for the image content according to preview screen.
Recognition unit, whether for including face according to the degree of jitter and/or preview screen of imaging device, identification is current
The applicable night scene mode of photographed scene.
Second determination unit determines the preset exposure bias value of each frame image to be collected according to night scene mode.
As alternatively possible implementation, which further includes：
Second determining module, for the exposure time after determining at least frame image update to be collected and the exposure before update
Ratio between duration.
First update module, for being greater than or equal to remaining each frame image to be collected of duration lower limit, root to exposure time
According to ratio, the sensitivity or exposure time of remaining each frame image to be collected are updated.
As alternatively possible implementation, the first update module is also used to：
By the sensitivity product before ratio and remaining each frame image update to be collected, more as remaining each frame image to be collected
Sensitivity after new.
Alternatively, the exposure time product before ratio and remaining each frame image update to be collected is waited adopting as remaining each frame
Exposure time after collecting image update.
As alternatively possible implementation, which further includes：
Second update module is exposed for being greater than the image to be collected of maximum time limit to exposure time according to corresponding target
Light quantity and maximum time limit update sensitivity；And
According to maximum time limit, the exposure time that exposure time is greater than the image to be collected of maximum time limit is updated.
The exposure-control device of the embodiment of the present application, by surveying light with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, each frame image to be collected is determined
Exposure time according to duration lower limit, update at least one if the exposure time of at least frame image to be collected is less than duration lower limit
The exposure time of frame image to be collected is exposed control finally according to the exposure time and sensitivity of each frame image to be collected.
As a result, by according to the degree of jitter of imaging device and the environmental light brightness of present filming scene, it is determined that each frame figure to be collected
The exposure time of picture, so according to duration lower limit update at least frame image to be collected exposure time, finally according to update after
Each frame image to be collected exposure time and sensitivity, be exposed control, and then be imaged, not only improve night scene shooting mould
The dynamic range and overall brightness of image are shot under formula, and effectively inhibits the noise in shooting image, improve night scene bat
The quality for taking the photograph image, improves user experience.
It should be noted that the aforementioned exposure for being also applied for the embodiment to the explanation of exposal control method embodiment
Control device, details are not described herein again.
In order to realize above-described embodiment, the embodiment of the present application also provides a kind of computer readable storage mediums.One or
Multiple non-volatile computer readable storage medium storing program for executing comprising computer executable instructions, when the computer executable instructions quilt
When one or more processors execute, so that the processor executes following steps：
Light is surveyed with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine that each frame waits for
Acquire the exposure time of image；
If the exposure time of at least frame image to be collected is less than duration lower limit, according at least frame image to be collected
Target light exposure amount and the duration lower limit, update the sensitivity of at least frame image to be collected, and according to it is described when
Long lower limit updates the exposure time of at least frame image to be collected；
According to the exposure time and sensitivity of each frame image to be collected, it is exposed control.
In order to realize above-described embodiment, the application also proposes a kind of electronic equipment, including：Memory, processor and storage
On a memory and the computer program that can run on a processor, it when the processor executes described program, realizes as above-mentioned
Exposal control method described in embodiment.
Referring to Fig. 5, the application also provides another electronic equipment 200.Electronic equipment 200 includes memory 50 and processing
Device 60.Computer-readable instruction is stored in memory 50.When computer-readable instruction is stored by 50 execution, so that processor
60 execute the exposal control method of any of the above-described embodiment.
Fig. 5 is the schematic diagram of internal structure of electronic equipment 200 in one embodiment.The electronic equipment 200 includes passing through to be
Processor 60, the memory 50 (for example, non-volatile memory medium), built-in storage 82,83 and of display screen of bus 81 of uniting connection
Input unit 84.Wherein, the memory 50 of electronic equipment 200 is stored with operating system and computer-readable instruction.The computer
Readable instruction can be executed by processor 60, to realize the exposal control method of the application embodiment.The processor 60 is for mentioning
For calculating and control ability, the operation of entire electronic equipment 200 is supported.The built-in storage 50 of electronic equipment 200 is memory 52
In computer-readable instruction operation provide environment.The display screen 83 of electronic equipment 200 can be liquid crystal display or electricity
Sub- ink display screen etc., input unit 84 can be the touch layer covered on display screen 83, be also possible to 200 shell of electronic equipment
Key, trace ball or the Trackpad of upper setting, are also possible to external keyboard, Trackpad or mouse etc..The electronic equipment 200 can
Be mobile phone, tablet computer, laptop, personal digital assistant or wearable device (such as Intelligent bracelet, smartwatch,
Intelligent helmet, intelligent glasses) etc..It will be understood by those skilled in the art that structure shown in Fig. 5, only with the application side
The schematic diagram of the relevant part-structure of case does not constitute the restriction for the electronic equipment 200 being applied thereon to application scheme,
Specific electronic equipment 200 may include perhaps combining certain components than more or fewer components as shown in the figure or having
Different component layouts.
Referring to Fig. 6, including image processing circuit 90, image processing circuit in the electronic equipment 200 of the embodiment of the present application
90 can be realized using hardware and or software component, including define ISP (Image Signal Processing, at picture signal
Reason) pipeline various processing units.Fig. 6 is the schematic diagram of image processing circuit 90 in one embodiment.As shown in fig. 6, for just
In explanation, the various aspects of image processing techniques relevant to the embodiment of the present application are only shown.
As shown in fig. 6, image processing circuit 90 includes ISP processor 91 (ISP processor 91 can be processor 60) and controls
Logic device 92 processed.The image data that camera 93 captures is handled by ISP processor 91 first, and ISP processor 91 is to image data
It is analyzed to capture the image statistics for the one or more control parameters that can be used for determining camera 93.Camera 93 can
Including one or more lens 932 and imaging sensor 934.Imaging sensor 934 may include colour filter array (such as Bayer
Filter), imaging sensor 934 can obtain the luminous intensity and wavelength information that each imaging pixel captures, and provide and can be handled by ISP
One group of raw image data of the processing of device 91.Sensor 94 (such as gyroscope) can be based on 94 interface type of sensor the figure of acquisition
As the parameter (such as stabilization parameter) of processing is supplied to ISP processor 91.94 interface of sensor can be SMIA (Standard
Mobile Imaging Architecture, Standard Mobile Imager framework) interface, other serial or parallel camera interfaces or
The combination of above-mentioned interface.
In addition, raw image data can also be sent to sensor 94 by imaging sensor 934, sensor 94 can be based on sensing
Raw image data is supplied to ISP processor 91 or sensor 94 and arrives raw image data storage by 94 interface type of device
In video memory 95.
ISP processor 91 handles raw image data pixel by pixel in various formats.For example, each image pixel can have
There is the bit depth of 8,10,12 or 14 bits, ISP processor 91 can carry out one or more image procossing behaviour to raw image data
Make, statistical information of the collection about image data.Wherein, image processing operations can by identical or different bit depth precision into
Row.
ISP processor 91 can also receive image data from video memory 95.For example, 94 interface of sensor is by original image
Data are sent to video memory 95, and the raw image data in video memory 95 is available to ISP processor 91 for place
Reason.Video memory 95 can be independent special in memory 50, a part of memory 50, storage equipment or electronic equipment
It with memory, and may include DMA (Direct Memory Access, direct direct memory access (DMA)) feature.
When receiving the original from 934 interface of imaging sensor or from 94 interface of sensor or from video memory 95
When beginning image data, ISP processor 91 can carry out one or more image processing operations, such as time-domain filtering.Treated image
Data can be transmitted to video memory 95, to carry out other processing before shown.ISP processor 91 is stored from image
Device 95 receives processing data, and carries out at the image data in original domain and in RGB and YCbCr color space to processing data
Reason.Treated that image data may be output to display 97 (display 97 may include display screen 83) for ISP processor 91, for
Family is watched and/or is further processed by graphics engine or GPU (Graphics Processing Unit, graphics processor).This
Outside, the output of ISP processor 91 also can be transmitted to video memory 95, and display 97 can read image from video memory 95
Data.In one embodiment, video memory 95 can be configured to realize one or more frame buffers.In addition, ISP is handled
The output of device 91 can be transmitted to encoder/decoder 96, so as to encoding/decoding image data.The image data of coding can be protected
It deposits, and is decompressed before being shown in 97 equipment of display.Encoder/decoder 96 can be real by CPU or GPU or coprocessor
It is existing.
The statistical data that ISP processor 91 determines, which can be transmitted, gives control logic device Unit 92.For example, statistical data may include
The imaging sensors such as automatic exposure, automatic white balance, automatic focusing, flicker detection, black level compensation, 932 shadow correction of lens
934 statistical informations.Control logic device 92 may include the processing element and/or microcontroller for executing one or more routines (such as firmware)
Device, one or more routines can statistical data based on the received, determine the control parameter of camera 93 and the control of ISP processor 91
Parameter processed.For example, the control parameter of camera 93 may include 94 control parameter of sensor (such as the integral of gain, spectrum assignment
Time, stabilization parameter etc.), camera flash control parameter, 932 control parameter of lens (such as focus or zoom focal length) or
The combination of these parameters.ISP control parameter may include for automatic white balance and color adjustment (for example, during RGB processing)
932 shadow correction parameter of gain level and color correction matrix and lens.
The following are realize exposal control method with image processing techniques in Fig. 6：
Light is surveyed with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine that each frame waits for
Acquire the exposure time of image；
If the exposure time of at least frame image to be collected is less than duration lower limit, according at least frame image to be collected
Target light exposure amount and the duration lower limit, update the sensitivity of at least frame image to be collected, and according to it is described when
Long lower limit updates the exposure time of at least frame image to be collected；
According to the exposure time and sensitivity of each frame image to be collected, it is exposed control.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a non-volatile computer and can be read
In storage medium, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage is situated between
Matter can be magnetic disk, CD, read-only memory (Read-Only Memory, ROM) etc..
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (13)
1. a kind of exposal control method, which is characterized in that the described method comprises the following steps：
Light is surveyed with the target light exposure amount of each frame of determination image to be collected；
According to the target light exposure amount of each frame image to be collected and the preset sensitivity of each frame image to be collected, determine that each frame is to be collected
The exposure time of image；
If the exposure time of at least frame image to be collected is less than duration lower limit, according to the duration lower limit, update is described at least
The exposure time of one frame image to be collected；
According to the exposure time and sensitivity of each frame image to be collected, it is exposed control.
2. exposal control method according to claim 1, which is characterized in that the target according to each frame image to be collected
Light exposure and the preset sensitivity of each frame image to be collected before the exposure time for determining each frame image to be collected, further include：
According to degree of jitter, preset sensitivity described in each frame image to be collected is determined.
3. exposal control method according to claim 2, which is characterized in that preset photosensitive described in each frame image to be collected
Spend it is identical, it is described that preset sensitivity described in each frame image to be collected is determined according to degree of jitter, including：
The sensor being arranged from imaging device, obtains collected displacement information；
According to institute's displacement information, the degree of jitter of the imaging device is determined；
If the degree of jitter is greater than or equal to dithering threshold, determine that the preset sensitivity value is the first photosensitive value；
If the degree of jitter is less than dithering threshold, determine that the preset sensitivity value is the second photosensitive value；Wherein, described
First photosensitive value is greater than second photosensitive value.
4. exposal control method according to claim 3, which is characterized in that
First photosensitive value is the presupposition multiple of second photosensitive value, and the presupposition multiple value is more than or equal to 2；
Second photosensitive value is the minimum sensitivity of the imaging device.
5. exposal control method according to claim 1, which is characterized in that
The duration lower limit is greater than or equal to 10ms.
6. exposal control method according to claim 1-5, which is characterized in that the survey light is waited for each frame of determination
The target light exposure amount of image is acquired, including：
According to the luminance information of preview image, benchmark light exposure is determined；The benchmark light exposure includes benchmark exposure time and base
Quasi- sensitivity；
According to the benchmark light exposure and the preset exposure bias value of each frame image to be collected, the mesh of each frame image to be collected is determined
Mark light exposure.
7. exposal control method according to claim 6, which is characterized in that described according to the benchmark light exposure and each frame
The preset exposure bias value of image to be collected before the target light exposure amount for determining each frame image to be collected, further includes：
Obtain preview screen；
According to the image content of the preview screen, determine that present filming scene belongs to night scene scene；
It whether include face according to the degree of jitter of imaging device and/or the preview screen, identification present filming scene is applicable in
Night scene mode；
According to the night scene mode, the preset exposure bias value of each frame image to be collected is determined.
8. exposal control method according to claim 1-5, which is characterized in that described according under the duration
It limits, after the exposure time for updating at least frame image to be collected, further includes：
Ratio between exposure time after determining at least frame image update to be collected and the exposure time before update；
It is greater than or equal to remaining each frame image to be collected of the duration lower limit to exposure time, according to the ratio, updates institute
State the sensitivity or exposure time of remaining each frame image to be collected.
9. exposal control method according to claim 8, which is characterized in that it is described according to the ratio, update it is described its
The sensitivity or exposure time of remaining each frame image to be collected, including：
By the sensitivity product before the ratio and remaining described each frame image update to be collected, wait adopting as remaining described each frame
Sensitivity after collecting image update；
Alternatively, by the exposure time product before the ratio and remaining described each frame image update to be collected, as it is described remaining
Exposure time after each frame image update to be collected.
10. exposal control method according to claim 8, which is characterized in that described to be greater than or equal to institute to exposure time
Remaining each frame image to be collected for stating duration lower limit updates the photosensitive of remaining each frame image to be collected according to the ratio
Before degree, further include：
It is greater than the image to be collected of maximum time limit to exposure time, according to corresponding target light exposure amount and the maximum time limit, more
New sensitivity；And
According to the maximum time limit, exposure time of the exposure time greater than the image to be collected of maximum time limit is updated.
11. a kind of exposure-control device, which is characterized in that described device includes：
Optical module is surveyed, for surveying light with the target light exposure amount of each frame of determination image to be collected；
Determining module, for the target light exposure amount and the preset sensitivity of each frame image to be collected according to each frame image to be collected,
Determine the exposure time of each frame image to be collected；
Update module, if the exposure time at least frame image to be collected is less than duration lower limit, according to an at least frame
The target light exposure amount of image to be collected and the duration lower limit update the sensitivity of at least frame image to be collected, and
According to the duration lower limit, the exposure time of at least frame image to be collected is updated；
Control module is exposed control for the exposure time and sensitivity according to each frame image to be collected.
12. one or more includes the non-volatile computer readable storage medium storing program for executing of computer executable instructions, when the calculating
When machine executable instruction is executed by one or more processors, so that the processor is executed such as any one of claim 1-10
The exposal control method.
13. a kind of electronic equipment, including memory and processor, computer-readable instruction is stored in the memory, it is described
When instruction is executed by the processor, so that the processor executes such as spectrum assignment of any of claims 1-10
Method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810963320.5A CN108900782B (en) | 2018-08-22 | 2018-08-22 | Exposure control method, exposure control device and electronic equipment |
| PCT/CN2019/090627 WO2020038074A1 (en) | 2018-08-22 | 2019-06-11 | Exposure control method and apparatus, and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963320.5A CN108900782B (en) | 2018-08-22 | 2018-08-22 | Exposure control method, exposure control device and electronic equipment |
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