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Brightness compensation method based on low-rank structure extraction in multi-view video coding

A technology of brightness compensation and video coding, which is applied to color TV parts, TV system parts, digital video signal modification, etc., can solve the problems of low stability and low correction degree, and achieve improved correlation, high robustness, Effect of Large Coding Gain

Active Publication Date: 2016-11-09
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a brightness compensation scheme based on low-rank structure extraction. This invention transforms the brightness compensation problem into a complete noise removal problem through a low-rank matrix. The method is stable to outliers and have a lower degree of correction

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  • Brightness compensation method based on low-rank structure extraction in multi-view video coding
  • Brightness compensation method based on low-rank structure extraction in multi-view video coding
  • Brightness compensation method based on low-rank structure extraction in multi-view video coding

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[0015] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that those skilled in the art can make some modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0016] like figure 1 Shown is the system framework of the present invention. The multi-view video sequence compensates each view through a mapping function. The compensation does not select a reference view to compensate other views to the reference view, but compensates each view to their common low Rank structure, so as to avoid the large correction when compensating the viewing angle far away from the reference viewing angle in the case of selecting the reference viewing angle. The compensa...

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Abstract

The present invention proposes a brightness compensation method based on low-rank structure extraction in multi-view video coding. This method regards the brightness difference between each view as mixed noise superimposed on the original view, and uses the correspondence between views to establish a low-rank structure. Rank structure matrix, due to the existence of occlusion, the matrix is ​​incomplete, only reliable points are selected for matrix completeness to restore the entire matrix, and thus the mapping function for brightness compensation is obtained. The method belongs to the preprocessing scheme of brightness compensation in multi-view video coding, that is, brightness compensation is performed before coding to obtain a compensated viewing angle. This method can significantly improve the correlation between perspectives in multi-view video, improve the prediction efficiency between perspectives, and thus improve the coding efficiency. Compared with the existing brightness compensation schemes, the compensated perspective obtained by this method has a larger value than the original perspective. similarity.

Description

technical field [0001] The invention relates to a brightness compensation scheme in multi-view video coding, in particular to a brightness compensation method based on low-rank structure extraction. Background technique [0002] With the development of 3D stereoscopic video technology, multi-view video coding has attracted more and more attention. In multi-view video coding, an inter-view prediction scheme is added to improve coding efficiency. Due to the different lighting conditions between the various views and the inaccuracy of the camera correction, the same scene shows brightness differences between the various views. This will worsen the correlation between views and reduce the coding efficiency, which will affect the quality of synthesized views at the decoding end. Brightness compensation is a very important aspect in multi-view video coding. [0003] After searching the literature of the prior art, it was found that "Histogram-based prefiltering for luminance an...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/186H04N19/50H04N5/57
Inventor 熊红凯张晓鹏
Owner SHANGHAI JIAOTONG UNIV
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