CN104113743A - Colour camera automatic white balance processing method and device under low illumination - Google Patents
Colour camera automatic white balance processing method and device under low illumination Download PDFInfo
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Abstract
The invention discloses a colour camera automatic white balance processing method and device under low illumination. The method comprises the following steps: the mapping relationship table of exposure parameters of images, the environment infrared light intensity and infrared light image intensity estimated values is obtained through training; an image to be processed is acquired and the exposure parameters corresponding to the image are acquired, the current environment infrared light intensity information is detected on a real-time basis, and the current infrared light image intensity estimated value is acquired according to the exposure parameters, the environment infrared light intensity information and the mapping relationship table; the infrared influence removing process is performed on the image to be processed according to the current infrared light image intensity estimated value; and white balance correction is performed on the processed image obtained through the infrared influence removing process. By adopting the method and device of the invention, the chromatic aberration problem caused by the reason that correction cannot be performed effectively due to the influences of infrared light in the automatic white balance process under the low illumination condition can be avoided to make a color image having the advantage of high quality still can be obtained under low illumination.
Description
Technical field
The present invention relates to technical field of image processing, in particular to colour TV camera Automatic white balance processing method and device under a kind of low-light (level).
Background technology
Conventionally, the video camera apparatus such as Digital Video and digital camera generally comprises: optical lens, imageing sensor, picture processing chip, image transmission module and image display.
As everyone knows, the object of color of the same race can present different colors under the irradiation of Different Light, and for example, the object of grey can present yellow under incandescent lamp irradiates, and under cold light source irradiates, can present cyan etc.Because human eye has based on the automatic regulation function for color under this type of environment, therefore under different light sources, human eye can reduce the essential color of object.But, under this type of environment, after optical lens and imageing sensor processing, the color of output and the result of eye-observation are variant, for example show by a specific experiment, under fluorescent lamp irradiates, the image of grey object output after optical lens and imageing sensor processing presents obvious green.Therefore, must process the color of this output image, it be presented and the coming to the same thing or close grey of eye-observation under different light sources, the main implementation method that adopts white balance correction at present.
Under low-light (level) environment, than infrared light intensity, visual intensity is faint, when colour TV camera imaging, if imageing sensor receives infrared band and visible light wave range simultaneously, in the image obtaining, red light wave band can be larger than normal value, makes output image entirety partially red; If filter out infrared band, can reduce light-inletting quantity, reduce image brightness, thereby cause exposure parameter in picture processing chip to improve, and then increased noise.The previous case, common solution is the colouring information that abandons image, output black and white image; And latter event, because of image quality too poor and infeasible.
Summary of the invention
The object of the embodiment of the present invention is to provide under low light conditions, receive visible ray and infrared band, to output image carry out white balance correction effectively, to obtain colour TV camera Automatic white balance processing method and device under a kind of low-light (level) of the coloured image that color is gorgeous, noise intensity is less.
In order to reach the object of the embodiment of the present invention, the present invention realizes by the following technical solutions:
Colour TV camera Automatic white balance processing method under a kind of low-light (level), comprising:
Obtain the mapping relations table between exposure parameter, ambient infrared light intensity and the infrared light image intensity estimated value of image by training;
Obtain pending image, and obtain the exposure parameter corresponding with this image, detect in real time current environment infrared light strength information, obtain current infrared light image intensity estimated value according to described exposure parameter, ambient infrared light strength information and mapping relations table;
According to current infrared light image intensity estimated value, pending image is gone to the infrared processing that affects;
On infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
Preferably, comprise by the step of training the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value to obtain image:
Utilize Infrared irradiation material obtaining image, obtain the exposure parameter information of near the ambient infrared light strength information of optical lens, image simultaneously and obtain the equal value information of red channel of image;
Set up accordingly the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value of image and preserve.
Preferably, go the infrared step that affects processing to comprise according to present image infrared light intensity estimated value on pending image:
The red channel data of pending image are deducted to current infrared light image intensity estimated value, to reject the impact of infrared light.
Preferably, on infraredly affecting the step that processing image that processing obtains carries out white balance correction and comprise through going:
Carry out piecemeal to processing image;
Select and be not subject to the specific color piece of infrared impact or the larger grey piece of brightness value as candidate's ash piece;
Calculate the color-values of the grey piece of pending image according to candidate blocks;
The color-values of the grey piece of the pending image of foundation obtains correction parameter of white balance;
According to the correction parameter of white balance that obtains on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
Colour TV camera Automatic white balance processing unit under a kind of low-light (level), comprising:
The first data acquisition unit, for gathering and only have the image of infrared band; Obtain the infrared light strength information of current environment and the exposure parameter information of picture processing chip in the time taking this image;
Training unit, for obtain the equal value information of image red channel and corresponding ambient infrared light strength information and the exposure parameter information of picture processing chip with it from the first data acquisition unit, and training obtains the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value three of image accordingly;
The second data acquisition unit, for the pending image of Real-time Obtaining guarded region, and obtains the current environment infrared light strength information of this pending image, also obtains current exposure parameter information from picture processing chip simultaneously; Go to the infrared unit that affects, for obtain the exposure parameter corresponding with current pending image and current environment infrared light strength information from the second data acquisition unit, and inquire about accordingly described mapping relations table and obtain current infrared light image intensity estimated value; And further according to current infrared light image intensity estimated value, pending image is gone to the infrared processing that affects;
White balance correction unit, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
Preferably, described training unit comprises:
Processing unit, for there being and only having infrared band to irradiate under the environment of different materials, training obtains the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of exposure parameter, environment of image;
Storage unit, for the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of the exposure parameter of memory image, environment.
Preferably, described in, go to the infrared unit that affects to comprise:
Receiving element, for obtaining the exposure parameter corresponding with current pending image and for obtaining current infrared light strength information from the second data acquisition unit; And be further used for obtaining the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of exposure parameter, environment of image from training unit;
Reject the infrared processing unit that affects, be used for inquiring about described mapping relations table according to the exposure parameter corresponding with described pending image and current infrared light strength information and obtain current infrared light image intensity estimated value, and according to infrared light image intensity estimated value, pending image is gone to the infrared processing that affects.
Preferably, the infrared processing unit that affects of described rejecting goes the infrared step that affects processing to comprise according to current infrared light image intensity estimated value on pending image:
The red channel data of pending image are deducted to current infrared light image intensity estimated value, to reject the impact of infrared light.
Preferably, described white balance correction unit comprises:
Image block unit, for carrying out piecemeal to processing image;
Extract candidate ash module unit, be not subject to the specific color piece of infrared impact or the larger grey piece of brightness value as candidate's ash piece for picking out;
Ash piece determining unit, for calculating the color-values of the grey piece of pending image according to candidate's ash piece;
Correction parameter of white balance determining unit, obtains correction parameter of white balance for the color-values of the grey piece according to pending image;
White balance correction unit, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
The technique scheme that adopts the embodiment of the present invention to provide, can avoid in Automatic white balance process, cannot effectively proofreading and correct owing to being subject to the impact of infrared light the color distortion problem causing under low light conditions, make still can obtain the good coloured image of quality under low-light (level).
Brief description of the drawings
Fig. 1 is colour TV camera Automatic white balance process flow schematic diagram under a kind of low-light (level) provided by the invention;
Colour TV camera Automatic white balance process flow schematic diagram under a kind of low-light (level) that Fig. 2 provides for the present invention's one specific embodiment;
Colour TV camera Automatic white balance processing unit structural representation under a kind of low-light (level) that Fig. 3 provides for the embodiment of the present invention.
Realization, functional characteristics and the excellent effect of the object of the invention, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can be implemented so that those skilled in the art can better understand the present invention also, but illustrated embodiment is not as a limitation of the invention.
The main thought of the embodiment of the present invention is:
First obtain the mapping relations between exposure parameter, ambient infrared light intensity and the infrared light image intensity estimated value of image by training;
Then obtain pending image, exposure parameter and infrared light intensity, calculate infrared light image intensity estimated value according to the mapping relations between exposure parameter, ambient infrared light intensity and infrared light image intensity estimated value three;
According to infrared light image intensity estimated value, pending image is rejected to infrared light impact again, generate the image without infrared light impact;
Finally the image without infrared impact is carried out to white balance correction.
More specifically, as shown in Figure 1, under a kind of low-light (level) that the embodiment of the present invention provides, colour TV camera Automatic white balance processing method, comprises the steps:
S10, obtain the mapping relations table between exposure parameter, ambient infrared light intensity and the infrared light image intensity estimated value of image by training;
S20, obtain pending image, and obtain the exposure parameter of this current pending image, obtain current infrared light image intensity estimated value information according to described exposure parameter, ambient infrared light intensity and mapping relations table;
S30, the current infrared light image intensity estimated value information of foundation are gone the infrared processing that affects to pending image;
S40, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
Particularly, in described step S10, comprise by the step of training the mapping relations table between exposure parameter, ambient infrared light intensity and the infrared light image intensity estimated value to obtain image:
S101, there are and only have the different material obtaining images of Infrared irradiation, obtain the exposure parameter information of near ambient infrared light strength information optical lens, image simultaneously and obtain the equal value information of red channel of image;
Mapping relations table between S102, the exposure parameter of setting up accordingly image, ambient infrared light intensity and infrared light image intensity estimated value is also preserved.
Particularly, according to the embodiment of the present invention aspect, in described step S30, go the infrared step that affects processing to comprise according to current infrared light image intensity estimated value information on pending image:
The red channel data of pending image are deducted to current infrared light image intensity estimated value, to reject the impact of infrared light.
Particularly, according to the embodiment of the present invention aspect, in described step S40, on infraredly affecting the step that processing image that processing obtains carries out white balance correction and comprise through going:
S401, to process image carry out piecemeal;
S402, select and be not subject to the specific color piece of infrared impact or the larger grey piece of brightness value as candidate's ash piece;
S403, calculate the color-values of the grey piece of pending image according to candidate ash piece;
The color-values of the grey piece of S404, the pending image of foundation obtains correction parameter of white balance;
S405, according to the correction parameter of white balance that obtains on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
The performing step of the present invention's one specific embodiment comprises:
Step 1: gather the color image that has and only have the different materials of Infrared irradiation to produce, obtain optical lens neighbouring ambient infrared light strength information and exposure parameter, obtain the mapping relations between exposure parameter, ambient infrared light intensity and infrared light image intensity estimated value three.
In embodiments of the present invention, light source is infrared light, and the intensity of light source can be continuously adjustable, and General Requirements illumination is from 0.001lux to 50000lux, and concrete implementation step as shown in Figure 2.
The infrared light intensity L of environment
iRmeasured value is provided by infrared intensity detector, such as adopting Pbs photo resistance value to characterize the infrared light intensity of environment.
When training, infrared light image intensity estimated value I
iRmeasured value is characterized by the average of image red channel.
Exposure parameter mainly comprises the gain of time for exposure, aperture size and image processor.
Suppose that exposure parameter comprises the gain G ain of time for exposure T, aperture size F, image processor, and when ambient infrared light intensity be L
iRtime, T, F, Gain, L are set up in training
iRwith I
iRbetween mapping relations, and this mapping relations are preserved into mapping relations table so that in the middle of follow-up application, can be fast by T, F, Gain and L from this mapping relations table
iRand find corresponding I
iR.
Step 2: obtain the image without infrared light impact.
First obtain the color image (R with infrared impact
1, G
1, B
1), also obtain current exposure parameter T simultaneously
1, F
1, Gain
1, obtain infrared light intensity L
iR1.According in environment, it is larger that coloured image is affected by infrared light low, therefore, color image that noise low beautiful in order to obtain, the impact that needs to remove infrared light.Method according to the computed image brightness described in step 1 is calculated; According to T
1, F
1, Gain
1, L
iR1inquiry T, F, Gain, L
iRwith I
iRbetween mapping relations table obtain current infrared light image intensity estimated value I
iR1; Then red channel data are rejected the impact of infrared light.According to a preferred embodiment of the present invention, the method for rejecting infrared light impact is:
Infrared light intensity and real red wave band have formed the red wave band of pending image, that is:
Really belonged to the pixel value of red wave band: R ＇
1=R
1-L
iR1;
Step 3: determine the candidate's ash piece that affects image without infrared.
First be not subject to the specific color piece of infrared impact or the larger grey piece of brightness value as candidate's ash piece by being divided into limited the rectangular block that size shape is equal without the infrared image that affects, then picking out in all rectangular blocks.In the middle of practical application, the specific color lump that is not subject to infrared impact includes but not limited to following several realization:
1) Blue Sky type color blocks, the rgb value of this color blocks is at (97 ± ε
r, 119 ± ε
g, 117 ± ε
b) in represented scope;
2) Orange Yellow type color blocks, the rgb value of this color blocks is at (255-ε
r, 142 ± ε
g, 0+ ε
b) in represented scope;
3) Cyan type color blocks, the rgb value of this color blocks is at (0 ± ε
r, 148 ± ε
g, 189 ± ε
b) in represented scope;
4) Yellow type color blocks, the rgb value of this color blocks is at (255-ε
r, 217 ± ε
g, 0+ ε
b) in represented scope.
Wherein ε
r, ε
g, ε
bspan be and be greater than 0 and be less than T, while specifically enforcement, T can be chosen for 2.
The image brightness of image can be calculated acquisition according to the color image obtaining, and the method for calculating is varied, for example, can adopt following computing formula, supposes that the band strength of pending image three channel is respectively R, G, and B, the brightness of image is:
The grey piece that brightness value is larger, meets the following conditions:
Wherein, Y
thfor luminance threshold, T
1, T
2, T
3for being greater than 1 threshold value.
Step 4: the color character of determining pending image ash piece according to candidate's ash piece.
Suppose that the candidate's ash piece extracting has N, the RGB average value of i grey piece is R
i, G
i, B
i, the rgb value of last required grey piece is respectively R, G, B.In the middle of practical application, calculate R, G, the method for B includes but not limited to following several method:
Method one: adopt average weighted mode to calculate:
,
,
.
Method two: to R
1..., R
narrange and obtain according to order from small to large
, in the time that N is even number
, in the time that N is odd number
; Process G with identical method
1..., G
n, B
1..., B
nobtain G and B.
Method three: adopt following computing formula to calculate:
,
,
.
Step 205: determine correction parameter of white balance and wrap balance correction.
After determining R, G, the B of pending image ash piece, what in fact (R, G, B) characterized is the characteristic of light source, can change the correction parameter of white balance that light source is corresponding according to its calculating, be respectively: RGain, GGain and BGain, and utilize RGain, GGain and BGain to carry out white balance correction to pending image.RGain, GGain and BGain determine according to following formula;
Wherein, MinRGB represents the minimum value in (R, G, B).RGain, GGain and BGain can regulate the color-values of each pixel in image, concrete control method is to regulate R component according to RGain parameter, regulate G component according to GGain parameter, regulate B component according to BGain parameter, obtain distortionless correcting image, certain pixel of establishing before correction is (r1, g1, b1) proofread and correct after this pixel be r2=r1*RGain, g2=g1*GGain, b2=b1*BGain.
So far, white balance correction processing finishes.
As shown in Figure 3, the embodiment of the present invention also provides a kind of low-luminance color video camera Automatic white balance processing unit, comprising:
The first data acquisition unit, for gathering and only have the image of infrared band; Obtain the infrared light strength information of current environment and the exposure parameter information of picture processing chip in the time taking this image;
Training unit, for obtain the equal value information of image red channel and corresponding ambient infrared light strength information and the exposure parameter information of picture processing chip with it from the first data acquisition unit, and training obtains the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value three of image accordingly;
The second data acquisition unit, for the pending image of Real-time Obtaining guarded region, and obtains the current environment infrared light strength information of this pending image, also obtains current exposure parameter information from picture processing chip simultaneously; Go to the infrared unit that affects, for obtain the exposure parameter corresponding with current pending image and current environment infrared light strength information from the second data acquisition unit, and inquire about accordingly described mapping relations table and obtain current infrared light image intensity estimated value; And further according to current infrared light image intensity estimated value, pending image is gone to the infrared processing that affects;
White balance correction unit, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
Preferably, described training unit comprises:
Processing unit, for there being and only having infrared band to irradiate under the environment of different materials, training obtains the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of exposure parameter, environment of image;
Storage unit, for the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of the exposure parameter of memory image, environment.
Preferably, described in, go to the infrared unit that affects to comprise:
Receiving element, for obtaining the exposure parameter corresponding with current pending image and for obtaining current infrared light strength information from the second data acquisition unit; And be further used for obtaining the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of exposure parameter, environment of image from training unit;
Reject the infrared processing unit that affects, be used for inquiring about described mapping relations table according to the exposure parameter corresponding with described pending image and current infrared light strength information and obtain current infrared light image intensity estimated value, and according to infrared light image intensity estimated value, pending image is gone to the infrared processing that affects.
Preferably, the infrared processing unit that affects of described rejecting goes the infrared step that affects processing to comprise according to current infrared light image intensity estimated value on pending image:
The red channel data of pending image are deducted to current infrared light image intensity estimated value, to reject the impact of infrared light.
Preferably, described white balance correction unit comprises:
Image block unit, for carrying out piecemeal to processing image;
Extract candidate ash module unit, for picking out grey piece that specific color piece or brightness value are larger as candidate's ash piece;
Ash piece determining unit, for calculating the color-values of the grey piece of pending image according to candidate's ash piece;
Correction parameter of white balance determining unit, obtains correction parameter of white balance for the color-values of the grey piece according to pending image;
White balance correction unit, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
Correspondingly, continue with reference to figure 3, the embodiment of the present invention also provides colour TV camera under a kind of low-light (level), comprise optical lens, imageing sensor, picture processing chip, image transmission module and image display, it also comprises colour TV camera Automatic white balance processing unit under low-light (level) as above, and described device comprises:
For gathering and only have the image of infrared band; Obtain the infrared light strength information of current environment and the exposure parameter information of picture processing chip in the time taking this image;
Training unit, for obtain the equal value information of image red channel and corresponding ambient infrared light strength information and the exposure parameter information of picture processing chip with it from the first data acquisition unit, and training obtains the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value three of image accordingly;
The second data acquisition unit, for the pending image of Real-time Obtaining guarded region, and obtains the current environment infrared light strength information of this pending image, also obtains current exposure parameter information from picture processing chip simultaneously; Go to the infrared unit that affects, for obtain the exposure parameter corresponding with current pending image and current environment infrared light strength information from the second data acquisition unit, and inquire about accordingly described mapping relations table and obtain current infrared light image intensity estimated value; And further according to current infrared light image intensity estimated value, pending image is gone to the infrared processing that affects;
White balance correction unit, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
Detailed description for colour TV camera Automatic white balance processing unit under above-mentioned low-light (level) can be with reference to mentioned above, this do not done repetition here and carefully state.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a colour TV camera Automatic white balance processing method under low-light (level), is characterized in that, comprising:
Obtain the mapping relations table between exposure parameter, ambient infrared light intensity and the infrared light image intensity estimated value of image by training;
Obtain pending image, and obtain the exposure parameter corresponding with this image, detect in real time current environment infrared light strength information, obtain current infrared light image intensity estimated value according to described exposure parameter, ambient infrared light strength information and mapping relations table;
According to current infrared light image intensity estimated value, pending image is gone to the infrared processing that affects;
On infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
2. colour TV camera Automatic white balance processing method under low-light (level) as claimed in claim 1, it is characterized in that, comprise by the step of training the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value to obtain image:
Utilize Infrared irradiation material obtaining image, obtain the exposure parameter information of near the ambient infrared light strength information of optical lens, image simultaneously and obtain the equal value information of red channel of image;
Set up accordingly the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value of image and preserve.
3. colour TV camera Automatic white balance processing method under low-light (level) as claimed in claim 1, is characterized in that, goes the infrared step that affects processing to comprise according to present image infrared light intensity estimated value on pending image:
The red channel data of pending image are deducted to current infrared light image intensity estimated value, to reject the impact of infrared light.
4. colour TV camera Automatic white balance processing method under low-light (level) as claimed in claim 1, is characterized in that, on infraredly affecting the step that processing image that processing obtains carries out white balance correction and comprise through going:
Carry out piecemeal to processing image;
Select and be not subject to the specific color piece of infrared impact or the larger grey piece of brightness value as candidate's ash piece;
Calculate the color-values of the grey piece of pending image according to candidate blocks;
The color-values of the grey piece of the pending image of foundation obtains correction parameter of white balance;
According to the correction parameter of white balance that obtains on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
5. a colour TV camera Automatic white balance processing unit under low-light (level), is characterized in that, comprising:
The first data acquisition unit, for gathering and only have the image of infrared band; Obtain the infrared light strength information of current environment and the exposure parameter information of picture processing chip in the time taking this image;
Training unit, for obtain the equal value information of image red channel and corresponding ambient infrared light strength information and the exposure parameter information of picture processing chip with it from the first data acquisition unit, and training obtains the mapping relations table between exposure parameter, ambient infrared light strength information and the infrared light image intensity estimated value three of image accordingly;
The second data acquisition unit, for the pending image of Real-time Obtaining guarded region, and obtains the current environment infrared light strength information of this pending image, also obtains current exposure parameter information from picture processing chip simultaneously; Go to the infrared unit that affects, for obtain the exposure parameter corresponding with current pending image and current environment infrared light strength information from the second data acquisition unit, and inquire about accordingly described mapping relations table and obtain current infrared light image intensity estimated value; And further according to current infrared light image intensity estimated value, pending image is gone to the infrared processing that affects;
White balance correction unit, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
6. colour TV camera Automatic white balance processing unit under low-light (level) as claimed in claim 5, is characterized in that, described training unit comprises:
Processing unit, for there being and only having infrared band to irradiate under the environment of different materials, training obtains the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of exposure parameter, environment of image;
Storage unit, for the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of the exposure parameter of memory image, environment.
7. colour TV camera Automatic white balance processing unit under low-light (level) as claimed in claim 5, is characterized in that, described in go to the infrared unit that affects to comprise:
Receiving element, for obtaining the exposure parameter corresponding with current pending image and for obtaining current infrared light strength information from the second data acquisition unit; And be further used for obtaining the mapping relations table between infrared light strength information and the infrared light image intensity estimated value three of exposure parameter, environment of image from training unit;
Reject the infrared processing unit that affects, be used for inquiring about described mapping relations table according to the exposure parameter corresponding with described pending image and current infrared light strength information and obtain current infrared light image intensity estimated value, and according to infrared light image intensity estimated value, pending image is gone to the infrared processing that affects.
8. colour TV camera Automatic white balance processing unit under low-light (level) as claimed in claim 5, it is characterized in that, the infrared processing unit that affects of described rejecting goes the infrared method that affects processing to comprise according to current infrared light image intensity estimated value on pending image:
The red channel data of pending image are deducted to current infrared light image intensity estimated value, to reject the impact of infrared light.
9. colour TV camera Automatic white balance processing unit under low-light (level) as claimed in claim 5, is characterized in that, described white balance correction unit comprises:
Image block unit, for carrying out piecemeal to processing image;
Extract candidate ash module unit, be not subject to the specific color piece of infrared impact or the larger grey piece of brightness value as candidate's ash piece for picking out;
Ash piece determining unit, for calculating the color-values of the grey piece of pending image according to candidate's ash piece;
Correction parameter of white balance determining unit, obtains correction parameter of white balance for the color-values of the grey piece according to pending image;
White balance correction unit, on infraredly affecting the processing image that processing obtains and carry out white balance correction through going.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104639923A (en) * | 2015-02-04 | 2015-05-20 | 华为技术有限公司 | Method and device for processing image data, and terminal |
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| CN105872510A (en) * | 2016-04-25 | 2016-08-17 | 浙江大华技术股份有限公司 | Image white balance processing method and device |
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