CN106851126B - A kind of intelligent dimming method - Google Patents
A kind of intelligent dimming method Download PDFInfo
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- CN106851126B CN106851126B CN201710232262.4A CN201710232262A CN106851126B CN 106851126 B CN106851126 B CN 106851126B CN 201710232262 A CN201710232262 A CN 201710232262A CN 106851126 B CN106851126 B CN 106851126B
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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
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/50—Control of the SSIS exposure
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Abstract
The present invention relates to field of image processing more particularly to a kind of intelligent dimming methods.The present invention passes through the frequency for configuring and generating pulse-width signal, so that fast after the brightness change of LED light supplement lamp is first slow, it is close with the change procedure that cmos sensor automatic exposure is adjusted, in the case where solving and adjusting image frame brightness using the automatic exposure function of LED light supplement lamp and cmos sensor at the same time, the problem of picture brightness light and shade as caused by interacting LED light supplement lamp and cmos sensor flashes.
Description
Technical field
The present invention relates to field of image processing more particularly to a kind of intelligent dimming methods.
Background technique
Cmos sensor automatically adjusts the brightness of image frame by automatic exposure algorithm.In the darker situation of background environment
Under, cmos sensor meets the brightness demand of entire scene by longer exposure times and increase exposure gain, causes image
Noise increases, frame per second decline, or even needs stabilized image acquisition equipment to prevent from shaking, and otherwise picture can fog.To understand
The certainly above problem, most application product improves the brightness of subject environment by LED light supplement lamp, to reach diminution
The cmos sensor time for exposure, the purpose for reducing noise, improving frame per second, and then realize video smoothness and high image quality.
But the variation of LED light supplement lamp brightness value will affect cmos sensor and carry out automatic exposure adjusting, while CMOS is passed
Sensor carries out automatic exposure and adjusts and can act on the variation of LED light supplement lamp brightness value, so that the continuous light and shade of image frame be caused to dodge
It is bright.
Summary of the invention
The technical problems to be solved by the present invention are: using the automatic exposure of LED light supplement lamp and cmos sensor at the same time
In the case where function point analysis image frame brightness, the picture as caused by LED light supplement lamp and cmos sensor interaction is eliminated
The problem of brightness light and shade flashes.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
The present invention provides a kind of intelligent dimming method, comprising:
S1, the configuration frequency for generating pulse-width signal corresponding with preset quantity, form frequency unordered set；
Element in S2, the frequency unordered set that sorted from small to large according to the value of the frequency, it is orderly to obtain frequency
Set；Wherein, the frequency difference of serial number is less than default serial number in the frequency ordered set element and previous element is less than pre-
If difference on the frequency threshold value, the frequency difference of remaining element and previous element is greater than the predeterminated frequency difference threshold value；
S3, current ambient brightness mean value is obtained, obtains first environment brightness value；
If the difference of S4, the first environment brightness value and preset target brightness value is less than predetermined luminance difference threshold value, root
The brightness value of LED light supplement lamp is adjusted step by step according to the frequency ordered set, until the ambient brightness mean value got in real time is pre-
If in first object range of luminance values；
If the difference of S5, the first environment brightness value and preset target brightness value is greater than predetermined luminance difference threshold value:
S51, the brightness value that LED light supplement lamp is adjusted according to the frequency ordered set；
S52, current ambient brightness mean value is obtained, obtains second environment brightness value；
If S53, the second environment brightness value be not within the scope of default second target brightness value, according to default automatic exposure
Light algorithm adjusts time for exposure and exposure gain, until the ambient brightness mean value got in real time is in default third target brightness value
In range.
The beneficial effects of the present invention are: if in the range of the luminance mean value of current environment belongs to normal environment brightness,
In the range of the luminance mean value of current environment is intelligently adjusted to target brightness value step by step by starting LED light supplement lamp, without opening
The automatic exposure function of dynamic cmos sensor, without interaction between LED light supplement lamp and cmos sensor；If current environment it is too bright or
It is too dark, then the brightness value of LED light supplement lamp is first adjusted according to frequency ordered set, so that after the brightness change of LED light supplement lamp is first slow
Fastly, close with the change procedure that cmos sensor automatic exposure is adjusted, restart the automatic exposure function of cmos sensor, according to
Preset automatic exposure algorithm automatic adjustment time for exposure and exposure gain, so that the brightness of current environment is in target brightness value model
In enclosing, the quality of image frame is improved, during adjusting ambient brightness mean value, between LED light supplement lamp and cmos sensor
The phenomenon that influencing each other very small, effectively eliminating the flashing of picture brightness light and shade.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the specific embodiment of intelligent dimming method provided by the invention.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
The most critical design of the present invention is: the frequency of pulse-width signal is generated by configuring, so that LED light supplement lamp
It is fast after brightness change is first slow, it is close with the change procedure that cmos sensor automatic exposure is adjusted, to effectively eliminate picture brightness
The phenomenon that light and shade flashes.
Explanation of nouns:
| Ambient brightness mean value | The average brightness of subject peripheral region |
As shown in Figure 1, the present invention provides a kind of intelligent dimming method, comprising:
S1, the configuration frequency for generating pulse-width signal corresponding with preset quantity, form frequency unordered set；
Element in S2, the frequency unordered set that sorted from small to large according to the value of the frequency, it is orderly to obtain frequency
Set；Wherein, the frequency difference of serial number is less than default serial number in the frequency ordered set element and previous element is less than pre-
If difference on the frequency threshold value, the frequency difference of remaining element and previous element is greater than the predeterminated frequency difference threshold value；
S3, current ambient brightness mean value is obtained, obtains first environment brightness value；
If the difference of S4, the first environment brightness value and preset target brightness value is less than predetermined luminance difference threshold value, root
The brightness value of LED light supplement lamp is adjusted step by step according to the frequency ordered set, until the ambient brightness mean value got in real time is pre-
If in first object range of luminance values；
If the difference of S5, the first environment brightness value and preset target brightness value is greater than predetermined luminance difference threshold value:
S51, the brightness value that LED light supplement lamp is adjusted according to the frequency ordered set；
S52, current ambient brightness mean value is obtained, obtains second environment brightness value；
If S53, the second environment brightness value be not within the scope of default second target brightness value, according to default automatic exposure
Light algorithm adjusts time for exposure and exposure gain, until the ambient brightness mean value got in real time is in default third target brightness value
In range.
Further, further includes:
It is 11 that the preset quantity, which is arranged,；
The default serial number 5 is set；
The predeterminated frequency difference threshold value is set are as follows: 13.
Seen from the above description, LED light supplement lamp brightness value changes the influence to ambient brightness mean value, in cmos sensor
The process that automatic exposure algorithm adjusts ambient brightness mean value is close, slows down LED light supplement lamp and automatic exposure algorithm interacts
The phenomenon that bring film flicker.
Further, further includes:
It is that the preset target brightness value and default LED are mended that the corresponding maximum value of the second target brightness value range, which is arranged,
The sum of light lamp fault tolerance；The corresponding minimum value of the second target brightness value range is set for the preset target brightness value and institute
State the difference of default LED light supplement lamp fault tolerance；The value range of the default LED light supplement lamp fault tolerance is 16 to 32；
The corresponding maximum value of the third target brightness value range is arranged to be the preset target brightness value and preset automatic
The sum of exposure algorithm fault tolerance；It is the preset target brightness value that the corresponding minimum value of the third target brightness value range, which is arranged,
With the difference of the default automatic exposure algorithm fault tolerance；The value range of the default automatic exposure algorithm fault tolerance is 2 to 8.
Seen from the above description, if LED light supplement lamp fault tolerance or automatic exposure algorithm fault tolerance are too big, it is difficult to accurately by ring
Border luminance mean value is adjusted within the scope of normal brightness, such as under dark-state environment, since fault tolerance is too big, so that current environment brightness is also
Just stop having adjusted in partially dark state；If fault tolerance is too small, easily there is the bright phenomenon of bright back light, influence image quality；It uses
It is bright both can accurately to have adjusted environment for the value range of LED light supplement lamp fault tolerance provided by the invention and automatic exposure algorithm fault tolerance
It spends within the scope of mean value to normal brightness, and can effectively avoid and the bright phenomenon of bright back light occur.
Further, the S51 specifically:
Configure pulsewidth ordered set corresponding with the frequency ordered set；The pulsewidth ordered set includes pulsewidth ascending order
Set and pulsewidth descending set；
If the first environment brightness value is less than the preset target brightness value, successively according to the frequency ordered set
The brightness value of the LED light supplement lamp is adjusted with the element in the pulsewidth ascending order set, until the brightness value of the LED light supplement lamp
Have reached maximum value；
If the first environment brightness value is greater than the preset target brightness value, successively according to the frequency ordered set
The brightness value of the LED light supplement lamp is adjusted with the element in the pulsewidth descending set, until the brightness value of the LED light supplement lamp
Have reached minimum value.
Seen from the above description, when the brightness value of LED light supplement lamp reaches extreme value, automatic exposure algorithm can be just enabled, most
Big degree reduces the amplitude of variation of time for exposure and exposure gain, advantageously reduces image noise, improves frame per second, prevents from shaking.
Further, current ambient brightness mean value is obtained, specifically:
A frame image is obtained in real time；
Division described image is detection zone corresponding with predeterminable area number；
Calculate the brightness value of each detection zone；
According to the brightness value of each detection zone, the average brightness value of described image is obtained；
Calculate the absolute difference of the brightness value of each detection zone and the average brightness value of described image；
It is object region that label, which has the corresponding detection zone of the maximum absolute difference,；
Statistics is in addition to the object region, and the average brightness in remaining region, obtains ambient brightness in described image
Mean value.
Seen from the above description, it may recognize that object region, the ambient brightness being accurately obtained around subject
Mean value.
Further, further includes:
It is 25 that the predeterminable area number, which is arranged,.
Further, time for exposure and exposure gain are adjusted according to default automatic exposure algorithm, specifically:
If the second environment brightness value be less than the corresponding minimum value of the third target brightness value range, increase described in
Time for exposure and the exposure gain；
If the second environment brightness value be greater than the corresponding maximum value of the third target brightness value range, reduce described in
Time for exposure and the exposure gain.
Further, the brightness value of LED light supplement lamp is adjusted step by step, specifically:
Configure pulsewidth corresponding from the brightness value of different series；
Pulsewidth corresponding with the series is exported by the ascending or descending order drive control device of the series.
Further, successively according to the element adjusting in the frequency ordered set and the pulsewidth ascending order set
The brightness value of LED light supplement lamp, specifically:
The arteries and veins is successively exported according to the frequency drive control for generating pulse-width signal in the frequency ordered set
Corresponding pulsewidth in wide ascending order set.
Further, successively according to the element adjusting in the frequency ordered set and the pulsewidth descending set
The brightness value of LED light supplement lamp, specifically:
The arteries and veins is successively exported according to the frequency drive control for generating pulse-width signal in the frequency ordered set
Corresponding pulsewidth in wide descending set.
Seen from the above description, the brightness value of LED light supplement lamp is changed stepwise.
The embodiment of the present invention are as follows:
S1, the configuration frequency for generating pulse-width signal corresponding with preset quantity, form frequency unordered set；
Wherein, the preset quantity is 11.
Element in S2, the frequency unordered set that sorted from small to large according to the value of the frequency, it is orderly to obtain frequency
Set；Wherein, the frequency difference of serial number is less than default serial number in the frequency ordered set element and previous element is less than pre-
If difference on the frequency threshold value, the frequency difference of remaining element and previous element is greater than the predeterminated frequency difference threshold value；
It wherein, include 11 frequency values in frequency unordered set, the frequency difference two-by-two between preceding 5 elements is smaller, generally
It is 13, the frequency difference between being gradually increased two-by-two since the 6th element, so that LED light supplement lamp initial stage brightness change is small,
Gradually brightness change is obvious.S3, current ambient brightness mean value is obtained, obtains first environment brightness value；
Wherein, the method for current ambient brightness mean value is obtained specifically:
S31, a frame image is obtained in real time；
S32, division described image are 25 detection zones；
S33, the brightness value for calculating each detection zone；
S34, according to the brightness value of each detection zone, obtain the average brightness value of described image；
The absolute difference of the average brightness value of S35, the brightness value for calculating each detection zone and described image；
It is object region that S36, label, which have the corresponding detection zone of the maximum absolute difference,；
S37, statistics are in addition to the object region, and the average brightness in remaining region, obtains environment in described image
Luminance mean value；
If the difference of S4, the first environment brightness value and preset target brightness value is less than predetermined luminance difference threshold value, root
The brightness value of LED light supplement lamp is adjusted step by step according to the frequency ordered set, until the ambient brightness mean value got in real time is pre-
If in first object range of luminance values；
Wherein, the brightness value of LED light supplement lamp is adjusted step by step, specifically:
Configure pulsewidth corresponding from the brightness value of different series；
Pulsewidth corresponding with the series is exported by the ascending or descending order drive control device of the series.
Wherein, ambient brightness value can be changed by adjusting the brightness value of LED light supplement lamp, still, if the brightness of LED light supplement lamp
The excessive amplitude of variation that will lead to ambient brightness value of value amplitude of variation is big, when ambient brightness value varies widely, and can touch
It sends out LED light supplement lamp and carries out brightness regulation, so that LED light supplement lamp be caused to flash repeatedly, ambient brightness value adjusts failure.And it uses
LED light supplement lamp initial stage brightness change is small, and the mode of brightness change amplitude is gradually increased in the middle and later periods again, and smooth change environment is bright
The interaction of the brightness value of ambient brightness value and LED light supplement lamp is reduced to minimum, so that human eye is subtle, eliminated by angle value
Scintillation.
If the difference of S5, the first environment brightness value and preset target brightness value is greater than predetermined luminance difference threshold value:
S51, the brightness value that LED light supplement lamp is adjusted according to the frequency ordered set；Specifically:
Configure pulsewidth ordered set corresponding with the frequency ordered set；The pulsewidth ordered set includes pulsewidth ascending order
Set and pulsewidth descending set；
If the first environment brightness value is less than the preset target brightness value, successively according to the frequency ordered set
The middle frequency drive control for generating pulse-width signal exports corresponding pulsewidth in the pulsewidth ascending order set, until described
The brightness value of LED light supplement lamp has reached maximum value；
If the first environment brightness value is greater than the preset target brightness value, successively according to the frequency ordered set
The middle frequency drive control for generating pulse-width signal exports corresponding pulsewidth in the pulsewidth descending set, until described
The brightness value of LED light supplement lamp has reached minimum value；
S52, current ambient brightness mean value is obtained, obtains second environment brightness value；
If S53, the second environment brightness value be not within the scope of default second target brightness value, according to default automatic exposure
Light algorithm adjusts time for exposure and exposure gain, until the ambient brightness mean value got in real time is in default third target brightness value
In range.
Wherein, time for exposure and exposure gain are adjusted according to default automatic exposure algorithm, specifically:
If the second environment brightness value be less than the corresponding minimum value of the third target brightness value range, increase described in
Time for exposure and the exposure gain；
If the second environment brightness value be greater than the corresponding maximum value of the third target brightness value range, reduce described in
Time for exposure and the exposure gain；
Wherein, the corresponding maximum value of the second target brightness value range is the preset target brightness value and default LED
The sum of light compensating lamp fault tolerance；The corresponding minimum value of the second target brightness value range be the preset target brightness value with it is described
The difference of default LED light supplement lamp fault tolerance；The value range of the default LED light supplement lamp fault tolerance is 16 to 32；The third mesh
Mark the corresponding maximum value of range of luminance values be the preset target brightness value and default automatic exposure algorithm fault tolerance and；It is described
The corresponding minimum value of third target brightness value range is that the preset target brightness value and the default automatic exposure algorithm are fault-tolerant
The difference of value；The value range of the default automatic exposure algorithm fault tolerance is 2 to 8.
Wherein, so-called fault tolerance represents the difference of current environment brightness value and target brightness value within the scope of what, just recognizes
For the preferable picture of effect can be captured according to current ambient brightness value, passed whether through LED light supplement lamp or CMOS
Sensor carries out brightness regulation, adds deduct corresponding appearance when the current environment brightness value read in real time enters preset target brightness
In the range of mistake value, program is considered as brightness or exposure is adjusted and completed.
Since the fault tolerance of LED light supplement lamp is greater than the fault tolerance of automatic exposure algorithm, it ensure that LED light supplement lamp is adjusted excellent
First grade is higher than automatic exposure algorithm；Specifically, during program actual operation, since LED light supplement lamp has biggish error tolerance,
LED light supplement lamp can be adjusted at first makes ambient brightness value tentatively close to target value, i.e. coarse adjustment ambient brightness value；And then CMOS is sensed
Device starts automatic exposure by program, continues to be adjusted in itself error tolerance, i.e. fine tuning ambient brightness value.
For example, the fault tolerance of program setting LED light supplement lamp is 16, automatic exposure algorithm fault tolerance is 4, preset target brightness
Value is 80, the process adjusted according to LED light supplement lamp fault tolerance defined above and automatic exposure algorithm fault tolerance, LED light supplement lamp
In, the ambient brightness value got in real time is fallen between 64 to 96, is considered as adjusting in place.Subsequent cmos sensor continues to start
Automatic exposure is adjusted, and when the ambient brightness value got in real time is fallen between 76 to 84, completes exposure.
If LED light supplement lamp fault tolerance or automatic exposure algorithm fault tolerance are too big, LED light supplement lamp and cmos sensor will cause
It is insensitive to ambient brightness, it is adjusted without brightness and exposure.If LED light supplement lamp fault tolerance or automatic exposure algorithm fault tolerance are too
It is small, generally LED light supplement lamp cannot will occur and cmos sensor is difficult accurately to adjust ambient brightness value to mesh less than 2
It marks near brightness, the left and right in object brightness of meeting repeatedly jumps, and leads to LED light supplement lamp flashing constantly, cmos sensor exposure
Bright dark variation repeatedly.
Seen from the above description, the present embodiment provides a kind of intelligent dimming method, under normal brightness environment, program passes through
The brightness value for adjusting LED light supplement lamp achievees the purpose that make in current environment brightness to subject brightness range, does not need to restart
The automatic exposure algorithm of cmos sensor is exposed compensation；Under dark-state environment, program can be according to the frequency ordered set of configuration
It closes adjusting LED luminance value and continues to start cmos sensor if ambient brightness is not increased to subject brightness range yet to maximum value
Automatic exposure algorithm be exposed compensation.Under illuminated state environment, it is bright that program can adjust LED according to the frequency ordered set of configuration
Angle value continues the automatic exposure for starting cmos sensor if ambient brightness is not reduced in subject brightness range yet to minimum value
Light algorithm is to reduce ambient brightness.During adjusting ambient brightness, preferentially adjusted using LED light supplement lamp, effectively reduce by
In longer exposure times and increase the phenomenon that exposure gain bring image noise increases, while LED light supplement lamp and CMOS sensing
Influencing each other between device is little, effectively eliminates the bright phenomenon of the bright back light of picture.
In conclusion a kind of intelligent dimming method provided by the invention, if the luminance mean value of current environment belongs to normal ring
In the range of the brightness of border, then starts LED light supplement lamp and the luminance mean value of current environment is intelligently adjusted to target brightness value step by step
In range, without starting the automatic exposure function of cmos sensor, without phase interaction between LED light supplement lamp and cmos sensor
With；If current environment is too light or too dark, the brightness value of LED light supplement lamp is first adjusted according to frequency ordered set, so that LED light filling
It is fast after the brightness change of lamp is first slow, it is close with the change procedure that cmos sensor automatic exposure is adjusted, restart cmos sensor
Automatic exposure function, time for exposure and exposure gain are automatically adjusted according to preset automatic exposure algorithm, so that current environment
Brightness within the scope of target brightness value, improve the quality of image frame, during adjusting ambient brightness mean value, LED mend
The phenomenon that influencing each other between light lamp and cmos sensor is very small, effectively eliminates the flashing of picture brightness light and shade.Further, by upper
Description is stated it is found that LED light supplement lamp brightness value changes the influence to ambient brightness mean value, with automatic exposure algorithm in cmos sensor
The process for adjusting ambient brightness mean value is close, slows down LED light supplement lamp and automatic exposure algorithm interaction bring picture dodges
Bright phenomenon.Further, so that being higher than automatic exposure algorithm using the priority that LED light supplement lamp dims.Cmos sensor
Exposure gain can introduce image noise while increase, picture miscellaneous point occurs, influences image quality.First adjust the brightness of LED light supplement lamp
It is worth calculating position, then enables exposure gain adjusting, since LED light supplement lamp has done more luminance compensations, exposure gain is not required to
It draws high too much, corresponding picture noise is effectively controlled, and improves image quality.Further, when the brightness value of LED light supplement lamp reaches
When to extreme value, automatic exposure algorithm can be just enabled, utmostly reduces the amplitude of variation of time for exposure and exposure gain, is conducive to
Image noise is reduced, frame per second is improved, prevents from shaking.Further, it may recognize that object region, be accurately obtained subject
Ambient brightness mean value around body.Further, the brightness value of LED light supplement lamp is changed stepwise.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (8)
1. a kind of intelligent dimming method characterized by comprising
S1, the configuration frequency for generating pulse-width signal corresponding with preset quantity, form frequency unordered set；
Element in S2, the frequency unordered set that sorted from small to large according to the value of the frequency, obtains frequency ordered set；
Wherein, the frequency difference of serial number is less than default serial number in the frequency ordered set element and previous element is less than predeterminated frequency
The frequency difference of poor threshold value, remaining element and previous element is greater than the predeterminated frequency difference threshold value；
S3, current ambient brightness mean value is obtained, obtains first environment brightness value；
If the difference of S4, the first environment brightness value and preset target brightness value is less than predetermined luminance difference threshold value, according to institute
The brightness value that frequency ordered set adjusts LED light supplement lamp step by step is stated, until the ambient brightness mean value that gets in real time is default the
Within the scope of one target brightness value；
If the difference of S5, the first environment brightness value and preset target brightness value is greater than predetermined luminance difference threshold value:
S51, the brightness value that LED light supplement lamp is adjusted according to the frequency ordered set；
S52, current ambient brightness mean value is obtained, obtains second environment brightness value；
If S53, the second environment brightness value are calculated not within the scope of default second target brightness value according to automatic exposure is preset
Method adjusts time for exposure and exposure gain, until the ambient brightness mean value got in real time is in default third target brightness value range
It is interior；
Wherein, further includes:
It is 11 that the preset quantity, which is arranged,；
The default serial number 5 is set；
The predeterminated frequency difference threshold value is set are as follows: 13；
Wherein, further includes:
It is the preset target brightness value and default LED light supplement lamp that the corresponding maximum value of the second target brightness value range, which is arranged,
The sum of fault tolerance；Be arranged the corresponding minimum value of the second target brightness value range be the preset target brightness value with it is described pre-
If the difference of LED light supplement lamp fault tolerance；The value range of the default LED light supplement lamp fault tolerance is 16 to 32；
It is the preset target brightness value and default automatic exposure that the corresponding maximum value of the third target brightness value range, which is arranged,
The sum of algorithm fault tolerance；The corresponding minimum value of the third target brightness value range is set for the preset target brightness value and institute
State the difference of default automatic exposure algorithm fault tolerance；The value range of the default automatic exposure algorithm fault tolerance is 2 to 8.
2. intelligent dimming method according to claim 1, which is characterized in that the S51 specifically:
Configure pulsewidth ordered set corresponding with the frequency ordered set；The pulsewidth ordered set includes pulsewidth ascending order set
With pulsewidth descending set；
If the first environment brightness value is less than the preset target brightness value, successively according to the frequency ordered set and institute
The brightness value that the element in pulsewidth ascending order set adjusts the LED light supplement lamp is stated, until the brightness value of the LED light supplement lamp has reached
To maximum value；
If the first environment brightness value is greater than the preset target brightness value, successively according to the frequency ordered set and institute
The brightness value that the element in pulsewidth descending set adjusts the LED light supplement lamp is stated, until the brightness value of the LED light supplement lamp has reached
To minimum value.
3. intelligent dimming method according to claim 2, which is characterized in that obtain current ambient brightness mean value, specifically
Are as follows:
A frame image is obtained in real time；
Division described image is detection zone corresponding with predeterminable area number；
Calculate the brightness value of each detection zone；
According to the brightness value of each detection zone, the average brightness value of described image is obtained；
Calculate the absolute difference of the brightness value of each detection zone and the average brightness value of described image；
It is object region that label, which has the corresponding detection zone of the maximum absolute difference,；
For statistics in addition to the object region, the average brightness in remaining region in described image obtains ambient brightness mean value.
4. intelligent dimming method according to claim 3, which is characterized in that further include:
It is 25 that the predeterminable area number, which is arranged,.
5. intelligent dimming method according to claim 4, which is characterized in that adjusted and exposed according to default automatic exposure algorithm
Time and exposure gain, specifically:
If the second environment brightness value is less than the corresponding minimum value of the third target brightness value range, increase the exposure
Time and the exposure gain；
If the second environment brightness value is greater than the corresponding maximum value of the third target brightness value range, reduce the exposure
Time and the exposure gain.
6. intelligent dimming method according to claim 5, which is characterized in that adjust the brightness value of LED light supplement lamp, tool step by step
Body are as follows:
Configure pulsewidth corresponding from the brightness value of different series；
Pulsewidth corresponding with the series is exported by the ascending or descending order drive control device of the series.
7. intelligent dimming method according to claim 6, which is characterized in that successively according to the frequency ordered set and institute
The brightness value that the element in pulsewidth ascending order set adjusts the LED light supplement lamp is stated, specifically:
The pulsewidth liter is successively exported according to the frequency drive control for generating pulse-width signal in the frequency ordered set
Corresponding pulsewidth in ordered sets.
8. intelligent dimming method according to claim 6, which is characterized in that successively according to the frequency ordered set and institute
The brightness value that the element in pulsewidth descending set adjusts the LED light supplement lamp is stated, specifically:
Successively the pulsewidth is exported according to the frequency drive control for generating pulse-width signal in the frequency ordered set to drop
Corresponding pulsewidth in ordered sets.
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| CN108111767B (en) * | 2018-01-24 | 2020-07-28 | 努比亚技术有限公司 | Shooting method, terminal and computer readable storage medium |
| CN108513080A (en) * | 2018-04-19 | 2018-09-07 | 深圳臻迪信息技术有限公司 | A kind of control method and device of light filling |
| CN111343389B (en) * | 2019-05-16 | 2021-09-10 | 杭州海康慧影科技有限公司 | Automatic exposure control method and device |
| CN113395457B (en) * | 2020-03-11 | 2023-03-24 | 浙江宇视科技有限公司 | Parameter adjusting method, device and equipment of image collector and storage medium |
| CN111818712A (en) * | 2020-07-06 | 2020-10-23 | 浙江华诺康科技有限公司 | Brightness adjusting method and device, computer equipment and storage medium |
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| CN110677593A (en) | 2020-01-10 |
| CN106851126A (en) | 2017-06-13 |
| CN110677593B (en) | 2021-03-23 |
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