CN106791475B - Exposure adjustment method and the vehicle mounted imaging apparatus being applicable in - Google Patents
Exposure adjustment method and the vehicle mounted imaging apparatus being applicable in Download PDFInfo
- Publication number
- CN106791475B CN106791475B CN201710049731.9A CN201710049731A CN106791475B CN 106791475 B CN106791475 B CN 106791475B CN 201710049731 A CN201710049731 A CN 201710049731A CN 106791475 B CN106791475 B CN 106791475B
- Authority
- CN
- China
- Prior art keywords
- exposure
- brightness
- luminance information
- region
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- H04N23/72—Combination of two or more compensation controls
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
-
- 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
-
- 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
- H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
Abstract
The invention discloses a kind of exposure adjustment method and the vehicle mounted imaging apparatus being applicable in.Wherein, which comprises obtain the second luminance information of the first luminance information and non-interesting region that region-of-interest is preset in absorbed image；The exposure Adjusted Option of the photographic device is determined based on first luminance information and the second luminance information；After being exposed adjustment according to identified exposure Adjusted Option, reacquire first luminance information and with the second luminance information.The present invention effectively solves the problems, such as the high dynamic camera device such as vehicle mounted imaging apparatus poor in image definition in the case where light changes complex environment.
Description
Technical field
The present embodiments relate to image processing techniques more particularly to a kind of exposure adjustment method and what is be applicable in vehicle-mounted take the photograph
As device.
Background technique
Vehicle mounted imaging apparatus is recorded mainly for the data in driving conditions, vehicle-mounted with gradually popularizing for automobile
Photographic device is increasingly becoming car accessories, and vehicle mounted imaging apparatus records each of driving conditions details, unexpected in judgement
Occur to be capable of providing effective evidence when traffic accident, facilitates the claim of judgement and the insurance of accident.On this basis, vehicle
Auxiliary drive and automatic Pilot need vehicle mounted imaging apparatus to provide clearly image information for CPU.
Since vehicle can be influenced in photographic device by different factors in use: 1) existing for driving process it is a variety of not
Determine scene, for example, day and night, illumination, the influence of misty rain, the factors such as season；2) it shoots, acquires in the scene of high dynamic range
To data be limited to the dynamic range of photographic device itself and there is image section region brightness is over-exposed or brightness of image
It is under-exposed；3) scene changes in row driving process, the brightness such as traveling especially in the car light at night, tunnel disengaging, the woods
Change violent scene, it is desirable that brightness control variation can be quickly and accurate.
Traditional vehicle mounted imaging apparatus is usually a stationary value always as mesh using image overall brightness in automatic exposure
Mark such as uses this mode to carry out adjust automatically exposure the image of high dynamic scene, easily there is the excessively high drawn game of a large amount of local luminances
The case where portion's luminance shortage, so leads to not collect effective image information.
Summary of the invention
The vehicle mounted imaging apparatus that the present invention provides a kind of exposure adjustment method and is applicable in, to realize that vehicle mounted imaging apparatus exists
Adjust automatically exposes under high dynamic scene, with the purpose for the information that gets a distinct image.
In a first aspect, being used for photographic device the embodiment of the invention provides a kind of exposure adjustment method, comprising: obtain institute
Absorb the second luminance information of the first luminance information and non-interesting region that region-of-interest is preset in image；It is bright based on described first
Degree information and the second luminance information determine the exposure Adjusted Option of the photographic device；According to identified exposure Adjusted Option
After being exposed adjustment, reacquire first luminance information and with the second luminance information.
Second aspect, the embodiment of the invention also provides a kind of vehicle mounted imaging apparatus, comprising: optical unit is used for institute
The light of intake carries out imaging, to obtain image；And exposure adjusting unit, the optical unit is connected, for passing through
Method as described above is executed, at least described exposure control module of control executes corresponding exposure Adjusted Option.
The present invention in the image that vehicle mounted imaging apparatus is absorbed by dividing region-of-interest, and based on region-of-interest
The luminance evaluation of one luminance information and second luminance information in non-interesting region carries out tending to enable region-of-interest image clear
The exposure Adjusted Option of acquisition effectively solves the high dynamic camera devices such as vehicle mounted imaging apparatus in the case where light changes complex environment
The problem of poor in image definition.
Detailed description of the invention
Fig. 1 is the flow chart of exposure adjustment method in one embodiment in the embodiment of the present invention one；
Fig. 2 is the flow chart of exposure adjustment method in another embodiment in the embodiment of the present invention one；
Fig. 3 is the flow chart of exposure adjustment method in yet another embodiment in the embodiment of the present invention one；
Fig. 4 is a kind of structural schematic diagram of embodiment of the vehicle mounted imaging apparatus in the embodiment of the present invention two；
Fig. 5 is the structural schematic diagram of the another embodiment of the vehicle mounted imaging apparatus in the embodiment of the present invention two.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is the flow chart for the exposure adjustment method that the embodiment of the present invention one provides, and the present embodiment is applicable to vehicle and is taking the photograph
As device be based on brightness of image change and execute exposure Adjusted Option the case where, its object is to ensure vehicle mounted imaging apparatus or its
The image information that his high dynamic photographic device intake is handled convenient for subsequent image.This method can be by being mounted on vehicle mounted imaging apparatus
In picture processing chip execute, specifically comprise the following steps:
Step S110, the second of the first luminance information and non-interesting region that region-of-interest is preset in absorbed image is obtained
Luminance information.
Wherein, the region-of-interest can be preset image-region, and quantity can be one or more, described
Region-of-interest handles most frequent region part when being normally based on image procossing.In some embodiments, it can will be absorbed
Image carry out image-region division, and the image-region that will be covered with most frequent region part is determined as region-of-interest, institute
It states image-region of the image in addition to region-of-interest and is set as non-interesting region, for example, the image absorbed to be divided into the area of n*n
Domain, and wherein at least one region is set as region-of-interest, other regions are non-interesting region.In certain embodiments, institute
Preset region-of-interest concentrates road surface part in the picture in the image of intake.The region-of-interest can also be preparatory identification
, for example, identify the road surface characteristic being divided into several image-regions in advance, and by the image district comprising the road surface characteristic
Domain is determined as the region-of-interest.
In order to protrude the exposure sensitivity of region-of-interest, each region divided in some embodiments to image is carried out
The calibration of weight coefficient.Here, the weight coefficient can be it is preset, for example, the weight coefficient phase of each region-of-interest
Weight coefficient that is same and being greater than non-interesting region.For another example, the power of each region-of-interest is set according to default distribution (such as Gaussian Profile)
Weight coefficient and the weight coefficient in each non-interesting region.
First luminance information and the second luminance information can be the average brightness of corresponding region.In certain embodiment party
In formula, based on the weight coefficient of preset region-of-interest, will be corresponded in the image absorbed each pixel of the region-of-interest into
Weighted average processing of the row based on brightness, to obtain the first luminance information；And the weight system based on preset non-interesting region
Number, is weighted and averaged processing for each pixel in non-interesting region in the image absorbed, to obtain the second luminance information.Such as
Preset region-of-interest be it is multiple, the weight coefficient of each region-of-interest is different, and the weight coefficient in non-interesting region is identical, then will be every
Pixel intensity carries out brightness statistics in a concern area, and the brightness value of each region-of-interest is weighted and averaged to obtain first brightness
Information equally carries out brightness statistics to pixel intensity in each non-interesting region, and the brightness value in each non-interesting region is weighted and is put down
Obtain second luminance information.
Step S120, determine that the exposure of the photographic device adjusts based on first luminance information and the second luminance information
Scheme.
Specifically, for the brightness of the region-of-interest of monitoring image and entire image, selection can be captured clearly
The image of region-of-interest, this step can be by first luminance informations and the second luminance information and preset exposure regularization condition
It is matched, and according to matching result determines whether to expose and corresponding exposure Adjusted Option.Wherein, the exposure adjustment
Scheme includes: at least one of adjustment time for exposure, aperture and gain.
In order to stress adjustable strategies of the region-of-interest in entire image, in some embodiments, step S120 includes:
Step S121, S122 and S123 (not in diagram).
Step S121, the average brightness value of entire image is calculated based on first luminance information and the second luminance information.
Step S122, by the average brightness value and first luminance information respectively with preset exposure regularization condition into
Row matching.
Step S123, the exposure Adjusted Option of the photographic device is determined based on matching result.
Here, the exposure regularization condition includes object brightness section [TARGET_L, TARGET_H], the exposure adjustment
Scheme be it is a variety of, can be corresponding with every kind of matching result.Wherein, when first luminance information and average brightness value are respectively positioned on institute
It states in object brightness section, is then not exposed adjustment.At least one in first luminance information and average brightness value
It is a when not falling in the object brightness section, according to the first luminance information not fallen in the object brightness section and average
The combination of brightness value determines the exposure Adjusted Option of the photographic device.
For example, working as matching result are as follows: first luminance information (ATT_AVG) is higher than object brightness high threshold (TARGET_
H) and the average brightness value (AVG) is higher than object brightness high threshold (TARGET_H), alternatively, ATT_AVG falls into object brightness
In section and AVG is higher than TARGET_H, then corresponding exposure Adjusted Option are as follows: still exists in guarantee the first luminance information adjusted
In the case where in object brightness section, time for exposure or gain are reduced, it in some embodiments, can be according to gain, exposure
The priority of time and aperture adjusts step by step.
For another example, work as matching result are as follows: first luminance information (ATT_AVG) is lower than object brightness Low threshold (TARGET_
L) and the average brightness value (AVG) is lower than object brightness Low threshold (TARGET_L) or ATT_AVG falls into object brightness area
Interior and AVG is lower than TARGET_L, then corresponding exposure Adjusted Option are as follows: is guaranteeing the first luminance information adjusted still in mesh
In the case where marking in brightness section, time for exposure or gain are improved, in some embodiments, when can be according to aperture, exposure
Between and the priority of gain adjust step by step.
When matching result is different from above-mentioned various situations, corresponding exposure Adjusted Option is also corresponding complicated.Certain
In embodiment, the exposure Adjusted Option includes the following steps S124, S125 and S126, as shown in Figure 2.
Step S124, statistics entire image compares the brightness gap value of region-of-interest.
Step S125, fallen into inside or outside preset luminance difference threshold interval based on the brightness gap value, determine to
The reference brightness of adjustment region before adjustment.
Step S126, by adjusting at least one of time for exposure, aperture and gain, the reference brightness is adjusted to
Preset object brightness.
Specifically, calculating separately the brightness value in each region divided and the luminance mean value (ATT_ of each region-of-interest
AVG difference (Block_Diff)i), then all differences are taken absolute value and summed, obtain the sum of difference
When difference and (Sum_Diff) are less than the luminance difference threshold value low threshold (T of setting1), the average bright of general image is set
Influence coefficient (the K of degree1=1), and setting region-of-interest average brightness influence coefficient (K2=0)；Automatic exposure is in general
Logical scene carries out brightness control with whole image array data, only with the average brightness (AVG) of image array data as ginseng
Brightness is examined, the adjustment of automatic exposure is carried out.
When difference and (Sum_Diff) are greater than the luminance difference threshold value high threshold (T of setting2), the average bright of general image is set
Influence coefficient (the K of degree1=0), and be arranged region-of-interest average brightness influence coefficient (K2=1), automatic exposure can not be simultaneously
Take into account the brightness control of whole image array data and region-of-interest image array data.Only with the pattern matrix of region-of-interest
The average brightness (ATT_AVG) of data is used as reference brightness, carries out the adjustment of automatic exposure.
When difference and (Sum_Diff) are less than the luminance difference threshold value high threshold (T of setting2), greater than setting luminance difference threshold value
Low threshold (T1), the influence coefficient of the average brightness of region-of-interest is set Wherein, n
For image divide region quantity, and be arranged general image average brightness influence coefficient (K1=1-K2), automatic exposure takes into account
The brightness of whole image array data and region-of-interest image array data controls.By known (T1, AVG) and (T2,ATT_
AVG) two reference points do linear interpolation, and the brightness value that can be acquired between (AVG) and (ATT_AVG) is used as with reference to bright
Degree, carries out the adjustment of automatic exposure.
Wherein, the adaptive adjustment mode of object brightness, main imitation human eye can be adaptive under different brightness cases
Adjustment brightness, receive in the very big environment of bright dark difference to allow to be adjusted to different luminance states.
Scene illumination is higher, and the time for exposure is smaller, and gain is also smaller, and the object brightness of current scene is closer to the mesh set
Mark the maximum set value of brightness.
Scene illumination is lower, and the time for exposure is longer, and gain is also bigger, and the object brightness of current scene is closer to the mesh set
Mark the minimum setting value of brightness.
In the adaptive Regulation mechanism of the object brightness, it is desirable that under the high illuminations scene such as outdoor, target brightness value is being matched
It is a higher value in the effective range set.
In the adaptive Regulation mechanism of the object brightness, it is desirable that indoors or in cloudy day etc. under isolux scene, mesh
Marking brightness value is a value placed in the middle in the effective range of configuration.
In the adaptive Regulation mechanism of the object brightness, it is desirable that under the scene of the low-light (level)s such as night or darkness, target
Brightness value is a value less than normal in the effective range of configuration.
In some embodiments, its that the mode of image illumination grade scene can be fallen into according to average brightness is determined
In a certain scene illumination section and determine, and then the preset object brightness is based on light environment where the image that is absorbed
And determine.When the error between reference brightness value adjusted and target brightness value is within the scope of default allowable error, really
Determine image and enters stable state.
Then, after being exposed adjustment according to identified exposure Adjusted Option, the application can reacquire described
One luminance information and with the second luminance information, so as to monitor whether to continue exposure adjustment.
In some embodiments, the non-interesting region such as under night environment, in the absorbed image of vehicle mounted imaging apparatus
Vulnerable to the influence of street lamp, opposite vehicle temporarily irradiated, if reacquired in the way of step S110 average brightness into
And the matched mode for being exposed regularization condition is exposed adjustment, may cause the case where frequently adjusting, to influence
The clarity of region-of-interest in image captured by vehicle mounted imaging apparatus.Therefore, in order to reduce the exposure adjustment frequency, the application also exists
When determining without adjusting exposure, step S130 is provided.
Step S130, judge whether to reacquire first luminance information and the second luminance information.
Specifically, judge whether that reacquiring first luminance information and the mode of the second luminance information includes: step
S131 and S132 (not in diagram).
Step S131, the first brightness change value in absorbed multiple image in preset same region-of-interest is monitored,
And；Monitor the second brightness change value in absorbed multiple image in preset same non-interesting region.
Step S132, the first brightness change value and the second brightness change value are counted, and is based on statistical result
Determine whether to reacquire first luminance information and the second luminance information.
Specifically, record enters when stablize for the first time, in the picture the respective average brightness value of all areas.And
In the graph data of each frame later, when being respectively compared the average brightness value of all areas in present image and entering stable
Wait the changing value of the average brightness value of image.
In all areas, the brightness change value in single region is greater than the thresholding of setting, and the region is region-of-interest,
It is judged as effective variation detection zone, and records the weight coefficient (W in the regioni)。
It is judged as weight coefficient value and the accumulation calculating institute of effective variation detection zone in accumulation calculating all areas
There is the weight coefficient value of region-of-interest, and calculates the weight coefficient for being judged as effectively changing detection zone and account for all concern areas
The percentage (P) of the weight coefficient in domain judges whether to brightness adjustment according to percentage (P):
When the brightness in monolithic region or muti-piece region in non-interesting region changes and the changing value of brightness is greater than
When the brightness change thresholding of setting, automatic exposure is not turned on exposure adjustment.
When the brightness in region-of-interest monolithic region or less region change and the changing value of brightness be greater than set
When fixed brightness change thresholding, automatic exposure is not turned on exposure adjustment.
When the muti-piece regional luminance of region-of-interest change and the changing value of brightness be greater than setting brightness change door
Limit, automatic exposure judge the image data of successive frame, and the image data of continuous multiple frames, which exists, meets muti-piece region in region-of-interest
Brightness change is greater than the brightness change thresholding of setting, and there is also be unsatisfactory for muti-piece region brightness change in region-of-interest to be greater than setting
Brightness change thresholding when, automatic exposure is not turned on adjustment.
When the muti-piece regional luminance of region-of-interest change and the changing value of brightness be greater than setting brightness change door
Limit, automatic exposure judge the image data of successive frame, and it is bright that the image data of continuous multiple frames all meets muti-piece region in region-of-interest
When degree variation is greater than the brightness change thresholding of setting, it re-execute the steps S110.
When most of regional luminance of region-of-interest change and the changing value of brightness be greater than setting brightness change
When thresholding, it re-execute the steps S110.Here, described Fig. 3 shows a kind of detailed process for judging whether to readjust exposure.
The technical solution of the present embodiment, by dividing region-of-interest, and base in the image that vehicle mounted imaging apparatus is absorbed
In the luminance evaluation of the second luminance information of the first luminance information and non-interesting region of region-of-interest, carry out tending to make to pay close attention to
The exposure Adjusted Option that area image can be obtained clearly effectively solves the high dynamic camera devices such as vehicle mounted imaging apparatus and becomes in light
The problem of changing poor in image definition under complex environment.
Embodiment two
Fig. 4,5 be vehicle mounted imaging apparatus provided by Embodiment 2 of the present invention structural schematic diagram.The vehicle mounted imaging apparatus
It include: optical unit and exposure adjusting unit.
The optical unit is used to the light absorbed carrying out imaging, to obtain image.Comprising: lens group 31
With CMOS 32.Wherein, the lens group 31 absorbs light, and is allowed to be imaged on CMOS 32.
The vehicle mounted imaging apparatus further includes camera control unit 21, is connected with the exposure adjusting unit, is used for
Based on the control instruction that the exposure adjusting unit is exported, adjustment influences at least one ring that the optical unit 20 is imaged
Section.
Specifically, the camera control unit 21 include: aperture control module and exposure time control module (not in
Diagram).
The aperture control module is used to adjust aperture size based on the received aperture control instruction of institute.For example, according to institute
Received aperture control instruction gradually reduces/increase aperture scale.
The exposure time control module, which is used to adjust the lens group based on the received spectrum assignment instruction of institute, takes in light
The duration of line.For example, according to the instruction of received spectrum assignment be stepped up/reduce the duration of the lens group intake light.
The exposure adjusting unit is used to control at least described exposure control module by executing above-mentioned exposure adjustment method
Execute corresponding exposure Adjusted Option.
Here, the exposure adjusting unit can be the software and hardware being built in ISP chip 33 comprising: brightness
Statistical module 10 surveys light correction module 12, adjustment trigger module 11, automatic exposure strategic control module 13.
The brightness statistic 10 is used to obtain in absorbed image the first luminance information of default region-of-interest and non-
Second luminance information of region-of-interest.
The light correction module 12 of surveying is used to count the brightness gap value that entire image compares region-of-interest, and is based on institute
It states brightness gap value to fall into inside or outside preset luminance difference threshold interval, determines that the reference of region to be adjusted before adjustment is bright
Degree, and at least one of time for exposure, aperture and gain are adjusted by starting automatic exposure strategic control module 13, it will be described
Reference brightness is adjusted to preset object brightness.
The adjustment trigger module 11 is for judging whether to reacquire first luminance information and the second luminance information.
The automatic exposure strategic control module 13 is for implementing exposure Adjusted Option, wherein the automatic exposure strategy
Control module 13 will issue corresponding aperture control instruction and exposure to the aperture control module and/or exposure time control module
Photocontrol instruction.
Each module corresponds to the correspondence step in the various embodiments described above in the exposure adjusting unit, and executes corresponding steps institute
Bring function, this will not be detailed here.
For example, being transmitted in ISP 33 (image signal process), ISP 33 by 32 acquired image array of CMOS
In include a variety of image processing functions.It is described according to the application, the brightness needed letter is obtained by brightness statistic 10 first
Breath.Image input array is equally divided into n statistical regions by brightness statistic 10, and each statistical regions carry out brightness value tired
Adduction is averaged.The weight coefficient and region-of-interest of each statistical regions are set in brightness statistic 10, and calculate institute
There are the average brightness of statistical regions and the average brightness of region-of-interest.Light correction module 12 is surveyed by getting brightness statistic
The average brightness of the average brightness of the 10 all statistical regions being calculated and region-of-interest determines final automatic exposure institute
The reference brightness value needed.It adjusts trigger module 11 and is become by detecting the brightness of each statistical regions in the n statistical regions
Change situation, decide whether the adjustment control for carrying out automatic exposure strategy, detailed process is as shown in Figure 2.Automatic exposure policy control
The 13 reference brightness values calculated by reference to preset target brightness value and survey light correction module 12, by the reference brightness value tune
It is whole near target brightness value.When minimum value of the reference brightness value less than target brightness value, time for exposure and gain are promoted, ginseng is worked as
When examining maximum value of the brightness value greater than target brightness value, time for exposure and gain are reduced.Survey the main mesh of light correction module 12
Be the assessed value for obtaining more suitable present intensity, by the average brightness value of the n block got, the present image asked is suitable
Survey light reference brightness, and be used for automatic exposure adjustment.Firstly the need of in the n region got by brightness statistic
Each region average brightness value, calculates the average brightness value of all statistical regions and the average brightness value of region-of-interest.By every
The difference of a statistical regions and region-of-interest average brightness, it can be estimated that go out the complexity of current scene.Difference and it is smaller just
Illustrate that the brightness of current scene entirety is average, the influence value of the average brightness of all statistical regions is bigger, and region-of-interest is average
The influence value of brightness is smaller, can guarantee that the brightness of general image is suitable using the average brightness value of all statistical regions.Difference and
The bigger Luminance Distribution for illustrating current scene is more complicated, and the influence value of the average brightness of all statistical regions is smaller, region-of-interest
The influence value of average brightness is bigger, preferentially guarantees the brightness of region-of-interest using the average brightness value of region-of-interest, surveys light correction
What module 12 preserved when entering and stablize by the statistics brightness and automatic exposure last time for obtaining n region of present frame
The difference of the statistics brightness in n region, to judge the brightness change in each region.The brightness that non-interesting region occurs becomes
Change, surveys light correction module 12 and automatic exposure is adjusted not as references object.For the brightness change of region-of-interest, light correction is surveyed
The variation degree of each statistical regions of automatic exposure is adjusted judgement by module 12.There are small part region-of-interests, and brightness occurs
Change and be more than threshold value, and most of region-of-interest brightness change and be no more than threshold value, survey light correction module 12 may determine that for
The brightness demand of main body scene is constant, and local scene occurs movement and causes to change, and automatic exposure can remain unchanged.There are one
Fixed region-of-interest occurs brightness change and is more than threshold value, and automatic exposure considers whether to generate because of the instantaneous movement of object
Changing condition surveys light correction module 12 and determines whether automatic exposure needs to adjust with reference to the changing value of continuous multiple frames.There are a large amount of
Region-of-interest occur brightness change and be more than threshold value, overall scenario can be determined as and changed, survey light correction module 12
Determine that automatic exposure needs are exposed adjustment.It is and current according to surveying the reference average brightness value that gets of light correction module 12
The object brightness of scene adaptive is compared.If being less than the low door of the object brightness threshold value of setting with reference to average brightness value
Limit, adjustment rate are greater than 1, and the method by increasing time for exposure or gain is needed to supplement brightness, if with reference to flat
Equal brightness is greater than the high threshold of the object brightness threshold value of setting, adjustment rate less than 1, then need by reduce the time for exposure or
The method of gain reduces with reference to average brightness.The time for exposure of automatic exposure and gain have reached maximum value, can pass through drop
Low frame per second improves overall exposing time of every frame image, to improve brightness.The time for exposure of automatic exposure and gain reach
Minimum value is arrived, the reference brightness of acquisition is still higher than current object brightness, and current automatic exposure is forced to stablize.It is automatic to expose
It is preferential to adjust the time for exposure in the control process of light, next adjust gain.Detailed process sees Fig. 2.
Here, the exposure and gain output interface 14 in Fig. 5 will consider the different types of camera of docking, exposure and increasing
The adaptable interface that the precision or mapping relations of benefit are different and are added, while considering the delay that comes into force of exposure and gain.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (9)
1. a kind of exposure adjustment method is used for photographic device characterized by comprising
Obtain the second luminance information of the first luminance information and non-interesting region that region-of-interest is preset in absorbed image；
The exposure Adjusted Option of the photographic device is determined based on first luminance information and the second luminance information；
After being exposed adjustment according to identified exposure Adjusted Option, first luminance information is reacquired and with second
Luminance information；
When determining without adjusting exposure, further includes: judge whether to reacquire first luminance information and the second brightness letter
The step of breath；
It is described to judge whether to reacquire first luminance information and the second luminance information, comprising:
The first brightness change value in absorbed multiple image in preset same region-of-interest is monitored, and；Monitoring is taken the photograph
In the second brightness change value in preset same non-interesting region in the multiple image taken；
The first brightness change value and the second brightness change value are counted, and determine whether to obtain again based on statistical result
Take first luminance information and the second luminance information.
2. exposure adjustment method according to claim 1, which is characterized in that the first luminance information of the acquisition and second bright
Spend information, comprising:
Based on the weight coefficient of preset region-of-interest, each pixel that the region-of-interest is corresponded in the image absorbed is carried out
Weighted average processing based on brightness, to obtain the first luminance information；
Based on the weight coefficient in preset non-interesting region, each pixel in the non-interesting region will be corresponded in the image absorbed
It is weighted and averaged processing, to obtain the second luminance information.
3. exposure adjustment method according to claim 2, which is characterized in that first luminance information and second bright of being based on
Degree information determines the exposure Adjusted Option of the photographic device, comprising:
The average brightness value of entire image is calculated based on first luminance information and the second luminance information；
The average brightness value and first luminance information are matched with preset exposure regularization condition respectively；
The exposure Adjusted Option of the photographic device is determined based on matching result.
4. exposure adjustment method according to claim 3, which is characterized in that the exposure regularization condition includes: that target is bright
Section is spent, and when at least one of first luminance information and average brightness value are not fallen in the object brightness section
When, according to the matching result of the average brightness value and first luminance information and the object brightness section, determine described in
The exposure Adjusted Option of photographic device.
5. exposure adjustment method according to claim 4, which is characterized in that the exposure Adjusted Option includes: that adjustment exposes
Between light time, at least one of aperture and gain.
6. exposure adjustment method according to claim 1 or 5, which is characterized in that the exposure Adjusted Option includes:
Count the brightness gap value that entire image compares region-of-interest；
It is fallen into inside or outside preset luminance difference threshold interval based on the brightness gap value, determines that region to be adjusted is adjusting
Preceding reference brightness, and by adjusting at least one of time for exposure, aperture and gain, the reference brightness is adjusted to pre-
If object brightness.
7. exposure adjustment method according to claim 6, which is characterized in that the preset object brightness is to be based on being taken the photograph
Light environment where the image that takes and determination.
8. a kind of vehicle mounted imaging apparatus characterized by comprising
Optical unit, for the light absorbed to be carried out imaging, to obtain image；
Exposure adjusting unit connects the optical unit, for passing through the method executed as described in any in claim 1-7,
At least described optical unit of control executes corresponding exposure Adjusted Option.
9. vehicle mounted imaging apparatus according to claim 8, which is characterized in that further include:
Camera control unit, comprising:
Aperture control module, for adjusting aperture size based on the received aperture control instruction of institute；
Exposure time control module, for based on received spectrum assignment instruction adjustment lens group intake light duration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049731.9A CN106791475B (en) | 2017-01-23 | 2017-01-23 | Exposure adjustment method and the vehicle mounted imaging apparatus being applicable in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049731.9A CN106791475B (en) | 2017-01-23 | 2017-01-23 | Exposure adjustment method and the vehicle mounted imaging apparatus being applicable in |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106791475A CN106791475A (en) | 2017-05-31 |
| CN106791475B true CN106791475B (en) | 2019-08-27 |
Family
ID=58942307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710049731.9A Active CN106791475B (en) | 2017-01-23 | 2017-01-23 | Exposure adjustment method and the vehicle mounted imaging apparatus being applicable in |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106791475B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021076359A1 (en) * | 2019-10-14 | 2021-04-22 | Qualcomm Incorporated | Systems and methods region-of-interest automatic gain or exposure control |
Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018235384A1 (en) | 2017-06-21 | 2018-12-27 | 富士フイルム株式会社 | Imaging device, control method for imaging device, and control program for imaging device |
| CN109309792B (en) * | 2017-07-26 | 2020-12-25 | 比亚迪股份有限公司 | Image processing method and device for vehicle-mounted camera and vehicle |
| CN109510946B (en) * | 2017-09-15 | 2020-07-17 | 展讯通信（上海）有限公司 | HDR scene detection method and system |
| CN108307123B (en) * | 2018-01-22 | 2021-10-26 | 维沃移动通信有限公司 | Exposure adjusting method and mobile terminal |
| CN111418201B (en) * | 2018-03-27 | 2021-10-15 | 华为技术有限公司 | Shooting method and equipment |
| JP7047549B2 (en) * | 2018-04-03 | 2022-04-05 | 株式会社アイシン | Image processing equipment |
| WO2020019266A1 (en) * | 2018-07-26 | 2020-01-30 | 华为技术有限公司 | Image processing method and device |
| CN111050143B (en) * | 2018-10-11 | 2021-09-21 | 华为技术有限公司 | Image shooting method and terminal equipment |
| CN111447405B (en) * | 2019-01-17 | 2021-10-29 | 杭州海康威视数字技术股份有限公司 | Exposure method and device for video monitoring |
| CN111343388B (en) * | 2019-04-11 | 2021-09-24 | 杭州海康慧影科技有限公司 | Method and device for determining exposure time |
| CN110189312B (en) * | 2019-05-24 | 2021-06-29 | 北京康夫子健康技术有限公司 | Method and device for evaluating brightness of fundus image, electronic device and storage medium |
| CN110248108B (en) * | 2019-06-14 | 2020-11-06 | 浙江大华技术股份有限公司 | Exposure adjustment and dynamic range determination method under wide dynamic state and related device |
| CN110276322B (en) * | 2019-06-26 | 2022-01-07 | 湖北亿咖通科技有限公司 | Image processing method and device combined with vehicle machine idle resources |
| CN110177222B (en) * | 2019-06-26 | 2021-02-05 | 湖北亿咖通科技有限公司 | Camera exposure parameter adjusting method and device combining idle resources of vehicle machine |
| TWI720830B (en) * | 2019-06-27 | 2021-03-01 | 多方科技股份有限公司 | Image processing device and method thereof |
| CN117176937A (en) * | 2019-09-27 | 2023-12-05 | 苹果公司 | gaze-based exposure |
| US11792531B2 (en) | 2019-09-27 | 2023-10-17 | Apple Inc. | Gaze-based exposure |
| CN113452925B (en) * | 2019-11-13 | 2023-09-19 | 深圳市道通智能航空技术股份有限公司 | Automatic exposure method for high dynamic range image and unmanned aerial vehicle |
| WO2021159279A1 (en) * | 2020-02-11 | 2021-08-19 | 深圳元戎启行科技有限公司 | Exposure control method and apparatus, and readable storage medium and computer device |
| CN111314623A (en) * | 2020-02-26 | 2020-06-19 | 开易（北京）科技有限公司 | Image acquisition method and device based on driver monitoring system |
| CN111556245A (en) * | 2020-04-26 | 2020-08-18 | 深圳深知未来智能有限公司 | Intelligent vehicle-mounted imaging system and method based on self-adaptive adjustment of surrounding scenes |
| WO2021223113A1 (en) * | 2020-05-06 | 2021-11-11 | 深圳市大疆创新科技有限公司 | Metering method, camera, electronic device, and computer-readable storage medium |
| CN113689505B (en) * | 2020-05-18 | 2024-04-02 | 魔门塔(苏州)科技有限公司 | Method and device for adjusting exposure parameters of vehicle-mounted camera based on positioning information |
| CN111626958B (en) * | 2020-05-27 | 2021-01-26 | 重庆紫光华山智安科技有限公司 | Exposure adjusting method, exposure adjusting device, computer-readable storage medium and electronic equipment |
| CN111770285B (en) * | 2020-07-13 | 2022-02-18 | 浙江大华技术股份有限公司 | Exposure brightness control method and device, electronic equipment and storage medium |
| US11265484B1 (en) | 2020-12-16 | 2022-03-01 | Waymo Llc | Systems and methods for automatic exposure of images |
| CN115022552B (en) * | 2021-02-18 | 2024-04-16 | 北京石头创新科技有限公司 | Image pick-up exposure method of self-walking equipment and self-walking equipment |
| CN112793587B (en) * | 2021-02-26 | 2022-04-01 | 深圳安途智行科技有限公司 | Sensing method and system |
| CN112911165B (en) * | 2021-03-02 | 2023-06-16 | 杭州海康慧影科技有限公司 | Endoscope exposure method, device and computer readable storage medium |
| CN113364991A (en) * | 2021-06-04 | 2021-09-07 | 巽腾(广东)科技有限公司 | Image generation control device and method based on LCD liquid crystal device |
| CN114025102A (en) * | 2021-09-29 | 2022-02-08 | 浙江亚太机电股份有限公司 | Method for improving identification accuracy and environmental adaptability of ADAS (advanced data acquisition System) |
| CN114449176A (en) * | 2022-01-10 | 2022-05-06 | 瑞芯微电子股份有限公司 | Automatic exposure method, dynamic range identification method, device, medium, and apparatus |
| CN115118887A (en) * | 2022-02-22 | 2022-09-27 | 北京时代民芯科技有限公司 | Automatic exposure method applied to domestic anti-radiation camera |
| CN114979504A (en) * | 2022-05-25 | 2022-08-30 | 深圳市汇顶科技股份有限公司 | Camera shooting parameter determining method and device and storage medium |
| CN117061878B (en) * | 2023-10-11 | 2024-01-23 | 北方夜视技术股份有限公司 | Automatic exposure control method based on EBAPS sensor camera and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102209200A (en) * | 2010-03-31 | 2011-10-05 | 比亚迪股份有限公司 | Automatic exposure control method |
| CN104881644A (en) * | 2015-05-25 | 2015-09-02 | 华南理工大学 | Face image acquisition method under uneven lighting condition |
| CN105827995A (en) * | 2016-03-30 | 2016-08-03 | 金三立视频科技（深圳）有限公司 | Automatic exposure method and system based on histogram |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9413976B2 (en) * | 2012-08-08 | 2016-08-09 | Intuitive Surgical Operations, Inc. | Auto exposure of a camera in a surgical robot |
-
2017
- 2017-01-23 CN CN201710049731.9A patent/CN106791475B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102209200A (en) * | 2010-03-31 | 2011-10-05 | 比亚迪股份有限公司 | Automatic exposure control method |
| CN104881644A (en) * | 2015-05-25 | 2015-09-02 | 华南理工大学 | Face image acquisition method under uneven lighting condition |
| CN105827995A (en) * | 2016-03-30 | 2016-08-03 | 金三立视频科技（深圳）有限公司 | Automatic exposure method and system based on histogram |
Non-Patent Citations (1)
| Title |
|---|
| 一种基于图像多区域的变步长自动曝光算法;匡艳 等;《电视技术》;20151002;第39卷(第19期);全文 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021076359A1 (en) * | 2019-10-14 | 2021-04-22 | Qualcomm Incorporated | Systems and methods region-of-interest automatic gain or exposure control |
| US11847808B2 (en) * | 2019-10-14 | 2023-12-19 | Qualcomm Incorporated | Systems and methods region-of-interest automatic gain or exposure control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106791475A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106791475B (en) | Exposure adjustment method and the vehicle mounted imaging apparatus being applicable in | |
| US7940955B2 (en) | Vision-based method of determining cargo status by boundary detection | |
| US7423674B2 (en) | Electronic camera having color adjustment function and program therefor | |
| CN101834996B (en) | Luminous flux control method of high definition vehicle snapshot system | |
| KR100733096B1 (en) | Camera device and photographing method | |
| JP5435307B2 (en) | In-vehicle camera device | |
| CN104184958A (en) | Automatic exposure control method and device based on FPGA and suitable for space exploration imaging | |
| CN113840096A (en) | WDR imaging with LED flicker suppression | |
| JP2013005234A5 (en) | ||
| JP2009017474A (en) | Image processing unit and image processing method | |
| US11240439B2 (en) | Electronic apparatus and image capture apparatus capable of detecting halation, method of controlling electronic apparatus, method of controlling image capture apparatus, and storage medium | |
| US20050122409A1 (en) | Electronic camera having color adjustment function and program therefor | |
| JP2003234950A (en) | Image processing device, image processing program, and image processing method | |
| CN108259775B (en) | Imaging method, imaging device and rearview mirror | |
| JPWO2010082277A1 (en) | Imaging apparatus and imaging method | |
| CN116017170A (en) | Imaging automatic exposure method and system for weak light scene with local strong light | |
| CN107786815B (en) | Active night vision self-adaptive exposure method and system and vehicle | |
| CN112291481B (en) | Exposure automatic adjusting method and device, electronic equipment and storage medium | |
| JP7278764B2 (en) | IMAGING DEVICE, ELECTRONIC DEVICE, IMAGING DEVICE CONTROL METHOD AND PROGRAM | |
| JP4304610B2 (en) | Method and apparatus for adjusting screen brightness in camera-type vehicle detector | |
| US20100322614A1 (en) | Exposure control unit and imaging apparatus | |
| JP4231599B2 (en) | Imaging device | |
| JP7297441B2 (en) | ELECTRONIC DEVICE, CONTROL METHOD AND PROGRAM FOR ELECTRONIC DEVICE | |
| CN113824892A (en) | Image acquisition method, device, equipment and storage medium | |
| CN110958394A (en) | Camera shooting method, device, storage medium and camera |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210430 Address after: Room 403-406, 4th floor, building C6, Changsha Science and technology new town, No.77, South Dongliu Road, Changsha Economic and Technological Development Zone, Changsha, Hunan 410000 Patentee after: Hunan Xingxin Microelectronics Technology Co.,Ltd. Address before: Room 4403-k, no.1325 Mudanjiang Road, Baoshan District, Shanghai 201900 Patentee before: X CHIP MICROELECTRONICS TECHNOLOGY Co.,Ltd. |