Method and apparatus for realizing correction of white balance
A white balance and uniform technology, applied in the field of image processing, can solve problems such as poor image quality and image distortion, and achieve the effect of avoiding distortion, good image quality, and good user experience.
Active Publication Date: 2007-09-19
BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD
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[0004] The present invention provides a method and device for realizing white balance correction to solve the problems of image distortion and poor image quality in the prior art due to the lack of consideration of the influence of the light source
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[0071] In the present invention, it is first necessary to train the chromaticity value distribution area: collect the color image produced when each light source irradiates each color material, and determine the color value of the pixel point according to the chromaticity value of the pixel point in the color image. Chromaticity value distribution area; then determine the chromaticity value of the pixel in the image to be processed, and then determine the number of pixels in the image to be processed corresponding to the chromaticity value in the chromaticity value distribution area of the same light source; finally , determine the current light source according to the number, and perform white balance correction according to the parameters of the current light source.
[0072] Taking gray as an example, different colors will appear after passing through the image sensor under the illumination of different light sources, and the light source is generally expressed quantitativ...
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The present invention discloses a method for realizing white balance emendation, which comprises: sampling color images generated by each light source when irradiating on each color material, determining the chroma value distributing area of a pels point based on the chroma value of the pels in the color image; determining the chroma value of a pels in the image to be processed; determining the number of pels points of the image to be processed with accordance to the chroma value in the same chroma value distributing area, determining the light source according to the determined pels points; and performing the white balance emendation with basis of the parameters of the current light source. With this invention, the auto white balance error caused by ignoring the light source effect on emendation parameters can be avoided, and this invention has little image distortion, high quality and comfortable feeling for a user. The present invention also discloses a device for realizing white balance emendation.
Description
technical field [0001] The invention relates to image processing technology, in particular to a method and device for realizing white balance correction. Background technique [0002] Video camera equipment such as digital video cameras and digital cameras generally include optical lenses, image sensors, image processing chips, image transmission modules, and image display modules. In fact, a color will appear different under the illumination of different light sources, for example, gray will appear yellow under the illumination of incandescent lamp, and it will appear cyan under the illumination of cold light. The human eye has the function of automatic adjustment, and can distinguish between gray and colored objects even under different light sources. However, the output color of the gray object after passing through the optical lens and image sensor is not necessarily gray. Experiments show that in A light The original image output by the illuminated gray object through ...
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IPC IPC(8): H04N9/73H04N9/64
Inventor 黄英沈操王浩
Owner BEIJING VIMICRO ARTIFICIAL INTELLIGENCE CHIP TECH CO LTD