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Image white balance adjusting method and apparatus, image processing chip and storage apparatus

An adjustment method and technology of an adjustment device are applied in the field of image processing to achieve the effects of easy implementation, low resource consumption and fast adjustment

Inactive Publication Date: 2017-08-08
BUILDWIN SEMICON SHENZHEN CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide an image white balance adjustment method, device, image processing chip and storage device, aiming to solve existing problems

Method used

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  • Image white balance adjusting method and apparatus, image processing chip and storage apparatus
  • Image white balance adjusting method and apparatus, image processing chip and storage apparatus
  • Image white balance adjusting method and apparatus, image processing chip and storage apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] figure 1 The implementation flow of the method for adjusting the image white balance provided by Embodiment 1 of the present invention is shown. The method includes steps S1 to S4, which will be described in detail below.

[0058] Step S1, color space conversion step: converting the pixels of the image from the RGB domain to the YCbCr domain. After converting to the YCbCr domain, it is convenient to find the white point in the YCbCr domain in the subsequent steps.

[0059] Step S2, the step of calculating the brightness interval gain: find out the white point in each brightness interval according to the set brightness intervals and the white point color characteristic conditions of the plurality of brightness intervals, and calculate the white balance in each brightness interval Adjusted gain value;

[0060]In the above brightness interval gain calculation step, the white point color feature conditions include the ranges set for |Cb|, |Cr| and Y-|Cb|-|Cr| When the sp...

Embodiment 2

[0078] image 3 It shows the image white balance adjustment device provided by Embodiment 2 of the present invention, which includes a color gamut conversion unit 21 , a brightness interval gain calculation unit 22 , an image overall gain calculation unit 23 and an image color adjustment unit 24 . It will be described in detail below.

[0079] The color gamut conversion unit 21 is configured to convert the pixels of the image from the RGB domain to the YCbCr domain, so as to facilitate subsequent finding of white points in the YCbCr domain.

[0080] The brightness interval gain calculation unit 22 is used to find out the white point in each brightness interval according to the set brightness intervals and the white point color characteristic conditions of the plurality of brightness intervals, and calculate the white point in each brightness interval. Gain value for white balance adjustment.

[0081] In this embodiment, the white point color characteristic conditions of the ...

Embodiment 3

[0099] Such as image 3 As shown, the third embodiment of the present invention provides an image processing chip in the embodiment of the present invention, which includes at least one processor 310, memory 320 and interface 330, and the at least one processor 310, memory 320 and interface 330 are connected by bus;

[0100] The memory 320 stores computer-executable instructions;

[0101] The at least one processor 310 executes the computer-executed instructions stored in the memory 320, so that the image processing chip executes the method for adjusting the image white balance described in Embodiment 1.

[0102] An embodiment of the present invention also provides a storage device, on which instructions are stored, and when the instructions are executed by a processor, the steps of the above-mentioned method for adjusting the image white balance are realized.

[0103] In summary, the image white balance adjustment method, device, image processing chip, and storage device of...

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Abstract

The invention is applicable to the technical field of image processing, and provides an image white balance adjusting method and apparatus, an image processing chip and a storage apparatus. The method comprises a color gamut conversion step, a brightness interval gain calculation step and an overall image gain calculation step, and pixels of an image are converted from an RGB domain into a YCbCr domain in the color gamut conversion step; in the brightness interval gain calculation step, white points in brightness intervals are separately found out according to a plurality of set brightness intervals and white point color feature conditions of the plurality of set brightness intervals, and gain values of image white adjustment in the brightness intervals are calculated; and in the overall image gain calculation step, the gain value of overall image white adjustment is calculated according to the gains of the intervals and a set weight value. By adoption of the technical scheme of the invention, the compatibility of strong white balance is realized without causing white balance disorder.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image white balance adjustment method, device, image processing chip and storage device. Background technique [0002] White balance adjustment is an important part of color imaging, color display and other equipment. White balance adjustment refers to the use of digital signal processing methods to adaptively correct the color temperature deviation of the image acquired by the image sensor or the color temperature deviation of the liquid crystal display according to the image data, so that it is as consistent as possible with the actual scene color temperature. [0003] White balance adjustment includes white point selection and color component statistics, channel gain acquisition and color cast correction. The core of the white balance adjustment method is the selection of the white point, the statistics of the color components and the acquisition of th...

Claims

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Application Information

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IPC IPC(8): H04N9/73H04N9/04
CPCH04N23/10H04N23/88
Inventor 谭文胜
Owner BUILDWIN SEMICON SHENZHEN CO LTD
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