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White balance processing method and device under multiple light sources

A processing method and white balance technology, applied in the field of white balance processing methods and devices, can solve problems that cannot be solved, and achieve the effect of accurate white balance adjustment

Active Publication Date: 2015-05-06
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the existing white balance implementations and techniques can solve this kind of problem

Method used

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  • White balance processing method and device under multiple light sources
  • White balance processing method and device under multiple light sources
  • White balance processing method and device under multiple light sources

Examples

Experimental program
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Embodiment Construction

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] Aiming at the problem of color deviation caused by using a fixed white balance gain value for the entire image during white balance processing in the prior art, the embodiment of the present invention proposes a white balance processing method and device under multiple light sources, which can In multi-color temperature scenarios, implement accurate white balance adjustments for different color temperature areas in the image.

[0052] refer to image 3 , the white balance processing method under multiple light sources in the embodiment of the present invention may include the following steps:

[0053] Step 301, dividing the image to be processed into multiple sub-blocks;

[0054] After waiting for the camera to complete the exposure process of one frame of image, take out a frame of RGB format image (image data in Bayer (BAYER) format) obtained after exposur...

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Abstract

The invention provides a white balance processing method and a white balance processing device under multiple light sources, and belongs to the field of picture processing. The white balance processing method comprises the following steps of: dividing an image to be processed into a plurality of sub-blocks; acquiring values of color temperatures corresponding to the sub-blocks; determining a plurality of light source central sub-blocks according to the values of the color temperatures corresponding to the sub-blocks; acquiring global white balance yield values of the image to be processed and white balance yield values of the light source central sub-blocks; determining a white balance yield value of each pixel according to the global white balance yield values of the image to be processed and the white balance yield values of the light source central sub-blocks; and carrying out the white balance adjustment on the image to be processed according to the white balance yield values of the pixels. The method and the device can realize the accurate white balance adjustment on different color temperature areas.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a white balance processing method and device under multiple light sources. Background technique [0002] White light can become bluish or reddish under different light sources. When the color temperature of the light source is high, it is bluish, and when the color temperature of the light source is low, it is reddish, so the color of the object itself cannot be correctly reflected. Color temperature is a quantitative description of the color of the light source, and the unit is K (Kelvin). The human eye has the function of color constancy, that is, under different lighting conditions, the human visual system can restore the color of the object itself, which is not affected by the color temperature, which is called color constancy. However, the imaging sensor unit of the camera, such as charge-coupled device (CCD) and metal-oxide semiconductor device (CMOS), does not have such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/73
Inventor 朱旭东
Owner ZHEJIANG UNIVIEW TECH CO LTD
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