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Color shading correction method and device

A shadow correction and color technology, applied in image data processing, instruments, calculations, etc., can solve the problems that the compensation table cannot be accurately adapted, the color shadow correction effect is not ideal, etc., and achieve the effect of improving the correction effect.

Pending Publication Date: 2022-04-12
SPREADTRUM SEMICON (NANJING) CO LTD
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Problems solved by technology

[0004] However, the existing color shading correction technology has the problem that the compensation table cannot accurately adapt to the current light source, resulting in an unsatisfactory color shading correction effect

Method used

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  • Color shading correction method and device
  • Color shading correction method and device
  • Color shading correction method and device

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Embodiment Construction

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0051] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a" and "the" used in the embodiments of the present application are also intended to include plural forms, unless the context clearly indicates oth...

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Abstract

The invention provides a color shading correction method and device, and the method comprises the steps: firstly obtaining a plurality of compensation table combinations, each compensation table combination comprises compensation tables corresponding to two light sources with different color temperatures, and then calculating the error value of each compensation table combination for color shading correction through different interpolation coefficients, therefore, the optimal target compensation table suitable for the current light source is determined, color shadow correction is carried out through the target compensation table, the color shadow of the current light source can be accurately compensated, and the color shadow correction effect is effectively improved.

Description

technical field [0001] The present application relates to the technical field of image signal processing, in particular to a method and device for correcting color shading. Background technique [0002] Color shading (Color Shading) is a common lens shading, which is manifested in the inconsistency between the center of the image and the surrounding colors. Due to the different degrees of refraction of light of different spectra by the lens, light of different wavelengths falls on different positions of the image sensor (sensor) , Under different light source color temperatures, the attenuation trends of the R, G, and B channels are different, resulting in color deviations around and in the center of the image, poor color uniformity of the image, and seriously affecting image quality. [0003] In view of the above problems, a common solution is to perform image processing on the original graphics through an image signal processor (Image Signal Processor, ISP) after capturing...

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Application Information

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IPC IPC(8): G06T5/00G06T7/90G06T3/40
Inventor 赵如雪胡继瑶许志强邵子奇
Owner SPREADTRUM SEMICON (NANJING) CO LTD
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