Image processing method and system thereof

Abstract

The invention discloses an image processing method and a system thereof which are used for realizing the optimization of an image dynamic range and improving image contrast and permeability. The image processing method comprises the steps of dividing the current frame image into multiple overlapped image regions and determining the common overlapped part of four adjacent image regions as an image block, calculating the initial brightness of each pixel in each image region, calculating the gray expanding brightness of each pixel in each image region according to the initial brightness of each pixel in each image region, determining the output brightness of each pixel in the corresponding image block by using the gray expanding brightness of each pixel in the four image regions, determining the output image of each image block according to the initial brightness, the output brightness and the initial color channel value of each pixel in each image block and thus obtaining the output image of the current frame image.

Description

technical field [0001] The present invention relates to the field of video playback, in particular to an image processing method and system. Background technique [0002] Usually, some of the pictures we get directly through the video camera or the camera, due to underexposure or overexposure, etc., will lead to the distortion of the obtained picture and the real scene. The most obvious is that some information of the real scene will be lost in the picture. The dynamic range of the image is the key technology of image processing to obtain images with clear layers and rich information. [0003] Existing technologies generally improve the dynamic range of an image by increasing the gamma or adjusting the overall contrast of the image, but these global methods cannot make the dynamic range and transparency meet the requirements at the same time. [0004] In addition, in the field of video playback, the processing of each frame of image may cause a large difference in the brigh...

AI Technical Summary

Problems solved by technology

[0002] Usually, some of the pictures we get directly through the video camera or the camera, due to underexposure or overexposure, etc., will lead to the distortion of the obtained picture and the real scene. The most obvious is that some information of the real scene will be lost in the picture. The dynamic range of the image to obtain a layered and rich image is the key technology of image processing

[0003] Existing technologies generally improve the dynamic range of the image by increasing the gamma or adjusting the overall contrast of the image, but these global methods cannot make the dynamic range and transparency meet the requirements at the same time

[0004] In addition, in the field of video playback, the processing of each frame of image may cause a large difference in brightness between the two frames before and after video playback, resulting in discontinuity of video playback.

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