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Method for correcting multi-viewpoint video color

A multi-viewpoint video and color correction technology, applied in the field of multi-viewpoint video image processing, can solve problems such as complex calculation, low mapping accuracy, and slow color correction speed

Inactive Publication Date: 2009-09-16
上海贵知知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for the mapping curve from gray level 0 to gray level N, simple histogram matching cannot make the global histogram of the corrected image and the reference image the mapping with the smallest gap, and its mapping accuracy is not high, and the color correction Slow speed, complicated calculations, etc.

Method used

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  • Method for correcting multi-viewpoint video color
  • Method for correcting multi-viewpoint video color
  • Method for correcting multi-viewpoint video color

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0048] The concept of the minimum cost path defined by the present invention and the problem of finding the minimum cost path based on the dynamic programming technique are firstly described below.

[0049] The minimum cost path is described as image 3 Shown: Suppose the 1D histograms of the two images are h 1 ={h 1 [0], h 1 [1],...,h 1 [M]} and h 2 ={h 2 [0], h 2 [1],...,h 2 [N]}, define the cross-correlation matrix C as:

[0050] C M × N = h 1 ⊗ h 2 = c 11 c 12 ...

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Abstract

The invention discloses a method for color correction of multi-viewpoint video, comprising: calculating the histogram of the target image and the source image, using a dynamic programming algorithm to obtain the minimum cost path, thereby establishing the color mapping relationship between the source image and the target image, and The smoothness of the path is ensured by adding compensation factors in the horizontal and vertical directions, and finally the color correction of multi-viewpoint video is realized through video tracking technology. The present invention greatly improves the accuracy of color mapping on the premise of ensuring the accuracy of multi-viewpoint video color correction. , which reduces the computational complexity of multi-viewpoint video color correction, avoids color discontinuity at the region border during the color mapping process, eliminates edge distortion, and improves the speed and accuracy of multi-viewpoint video color correction.

Description

technical field [0001] The invention relates to a method for processing multi-viewpoint video images, in particular to a multi-viewpoint video color correction method. Background technique [0002] In the real world, the visual content seen by the observer depends on the position of the observer relative to the observed object, and the observer can freely choose various angles to observe and analyze things. In traditional video systems, the real scene relative to a viewpoint is determined by the cameraman or director. Users can only passively watch the video image sequence captured by the camera at a single viewpoint, but cannot freely choose other viewpoints. To observe the real scene. These unidirectional video sequences can only reflect one side of the real-world scene. The free-viewpoint video system allows users to freely choose a viewpoint to watch any side within a certain range in real-world scenes, and is called the development direction of the next-generation vid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64H04N9/68H04N17/02
Inventor 邵枫郁梅蒋刚毅
Owner 上海贵知知识产权服务有限公司