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Image processing method and device

An image processing and image technology, applied in the field of image processing, can solve problems such as poor white balance processing effect of portraits, and achieve the effect of improving the effect, avoiding color cast, and avoiding the introduction of errors.

Active Publication Date: 2021-11-19
SPREADTRUM SEMICON (NANJING) CO LTD
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Problems solved by technology

[0005] The embodiment of the present application provides an image processing method and device to overcome the problem of poor white balance processing effect of portraits

Method used

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Embodiment Construction

[0079] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0080] In order to better understand the technical solutions of the present application, the background technology involved in the present application is further introduced in detail below.

[0081] First of all, the white balance is introduced. The English of white balance is White Balance. Its basic concept is "regardless of any...

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Abstract

The embodiment of the invention provides an image processing method and device, and the method comprises the steps: obtaining a to-be-processed image which comprises a face image; acquiring a color value and a conversion coefficient of the face image in the first coordinate system; converting the color value of the face image through the conversion coefficient to obtain a reference color value, wherein the reference color value is used for indicating the color value of ambient light corresponding to the face image in the first coordinate system. According to the image information of the to-be-processed image and the reference color value, a target color value is determined, white balance processing is carried out on the to-be-processed image through the target color value, and the target color value is used for indicating the color value of ambient light corresponding to the to-be-processed image in the first coordinate system. The reference color value is determined through the conversion coefficient of the linear relationship between the reference color value and the color value of the face image, and the linear relationship is a primary linear relationship, so the white balance processing effect of the portrait can be effectively improved.

Description

technical field [0001] The embodiments of the present application relate to image processing technologies, and in particular, to an image processing method and apparatus. Background technique [0002] The automatic white balance (AWB) algorithm can compensate for the color cast of the image when shooting under a specific light source by strengthening the corresponding complementary color to achieve white balance processing. [0003] Among them, based on the AWB algorithm, a portrait automatic white balance (FACE-AWB) algorithm is also proposed. The current FACE-AWB algorithm has errors in the process of mapping the reference skin color point to the neutral color point, resulting in In large-area color mixing scenes and large-area non-neutral solid color scenes, the face is prone to color cast. [0004] Therefore, in the current FACE-AWB algorithm, there is a problem that the white balance processing effect of the portrait is not good. SUMMARY OF THE INVENTION [0005] Em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/73
CPCH04N23/88
Inventor 刘新宇郭逸汀熊佳
Owner SPREADTRUM SEMICON (NANJING) CO LTD
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