Camera white balance processing method

A processing method and white balance technology, applied in the direction of color signal processing circuit, etc., can solve the problems of color distortion, lack of image sensor, blue cast, etc., and achieve the effect of simple algorithm, easy hardware implementation, and strong color restoration ability

Inactive Publication Date: 2016-01-13
NANJING UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the image sensor does not have this adaptability. Due to the imbalance of the output of the image sensor under different lighting conditions, the color distortion of the sensor output will appear, resulting in the adverse consequences of the image being reddish or bluish.

Method used

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  • Camera white balance processing method
  • Camera white balance processing method

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Embodiment Construction

[0013] combine figure 1 , a processing method for camera white balance, comprising:

[0014] Step 1, count the sum of the pixel values ​​of the red, green and blue channels of each point in the current image;

[0015] Step 2, calculating the mean value of each color component pixel value;

[0016] Step 3, calculating the correction coefficient of the current frame image;

[0017] Step 4, perform white balance processing on the next frame image, that is, multiply the red pixel value by the red correction coefficient in the previous frame image, the green pixel value by the green correction coefficient in the previous frame image, and the blue pixel value by the above Correction coefficient for blue color in a frame of image;

[0018] Step 5, re-perform step 2 on the image after the white balance processing in step 4, and iterate repeatedly.

[0019] The image acquired by the camera is frame by frame. We need to correct the image output by the camera in real time when perfor...

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Abstract

The invention provides a camera white balance processing method. The method comprises steps: 1, a sum of pixel values of red, green and blue channels at each point of the current image is calculated; 2, a pixel average value of each color component is calculated; 3, a correction factor of the current-frame image is calculated; 4, white balance processing is carried out on the next-frame image, that is, the red pixel value is multiplied by the correction factor of the red in the former-frame image, the green pixel value is multiplied by the correction factor of the green in the former-frame image and the blue pixel value is multiplied by the correction factor of the blue in the former-frame image; and 5, operation in the second step is carried out on the image after white balance processing in the fourth step again, and repeated iteration is carried out.

Description

technical field [0001] The invention relates to video image processing technology, in particular to a processing method for camera white balance. Background technique [0002] White balance refers to the restoration of the color of a white object. In a physical sense, the reason why an object presents a certain color is because when the light hits the surface of the object, the light reflected by the surface of the object appears in the human visual system. of this particular color. That is to say, the color of an object observed by the human eye is not only related to the reflective properties of the object, but also related to the color of the light that hits the object. Under different lighting conditions, when we directly observe the world with the naked eye, the perception of the same color remains basically constant. For example, when we look at a white object in the morning when the sun rises, we feel that it is white. and at night, when we look at a white object un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/73
Inventor 韶阿俊钱惟贤顾国华
Owner NANJING UNIV OF SCI & TECH
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