Method and system for color shading correction for panoramic camera

Abstract

The present invention provides a method and system for color shading correction for a panoramic camera. The method comprises: acquiring a raw image of a YUV422 format of each lens in a panoramic camera, and converting each raw image into raw images with a Bayer format; performing statistics of R and B channel gain values of each camera in different rings according to the raw images with a Bayer format; calculating a polynomial fitting function of R and B channel gain values of each camera and integrated R and B gain values of each camera according to the R and B channel gain values, and calculating integrated average R and B gain values of all the cameras; and respectively calculating a color shading correction coefficient of each camera according to the integrated average R and B gain values and intensive R and B gain values. The method and system for color shading correction for a panoramic camera can allow the colors of a single camera in a panoramic image to be uniform and make colors of all the lenses consistent.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a color shadow correction method and system for a panoramic camera. Background technique [0002] Lens shading is the phenomenon of image brightness and color unevenness caused by the optical characteristics of the lens. Lens shading correction (lens shading correction) is to remove the shadows produced by the optical characteristics of the lens during the imaging process through a certain correction algorithm. [0003] Lens shading is divided into two parts: luma shading and color shading. Brightness shading means that the amount of light passing through the lens decreases from the center to the corners, causing the brightness response of the sensor to decrease from the center to the corners. The center of the image is bright, and the surroundings gradually become darker. Color shading means that due to the different refractive indices of light of differen...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, due to differences in optical characteristics between different lens modules in panoramic cameras and the problem of color shading of lenses, the problem of color cast in panoramic cameras is caused. In order to solve this problem, the present invention provides a panoramic The color shading correction method and system of a camera, the specific scheme is as follows:

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