DIBR method based on block projection

Abstract

The invention discloses a DIBR method based on block projection. The method comprises the steps of firstly acquiring a color image of and a depth image of a reference viewpoint and vidicon geometrical parameters of two viewpoints, dividing a reference image into a plurality of block areas, carrying out projection change on each block area, finally integrating all block areas in a target viewpoint image, and repairing cavities to achieve a final target viewpoint image. The DIBR method doesn't directly use a point-by-point mode to carry out viewpoint change to generate new viewpoints, so that the target viewpoint image is prevented from being affected by the continuity of the depth image. Simulation experiments and actual data are utilized to compare the performance of a traditional method and the performance of the DIBR method based on the block projection to verify the effectiveness of the DIBR method. Furthermore, the target viewpoint drawing quality is improved, and the transmission bandwidth is reduced.

Description

technical field [0001] The present invention relates to the fields of 3D video technology, free-viewpoint video technology and depth map-based rendering technology, in particular to a DIBR method based on block projection. Background technique [0002] Depth-based rendering (DIBR) technology (see the literature "Yu Li. Research on key technologies of free-viewpoint video based on depth image rendering [D]. [Ph.D. Thesis]. University of Science and Technology of China, 2010"), taking the camera projection theory as the viewpoint The theoretical basis of rendering is to transform the pixels in the reference viewpoint into the image plane under the target viewpoint under the condition of knowing the internal and external parameters of the camera and the depth information of the reference image. Theoretically, viewpoint rendering at any position can be realized, and it has the advantages of fast rendering speed and small bandwidth requirement. It is one of the key technologies f...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies and shortcomings of the prior art, in order to effectively solve the problem that the current method has high computational complexity and the viewpoint quality is easily restricted by the accuracy of the depth map, and provides an optimized DIBR method based on block projection, It is aimed at the characteristics that the hole area of ​​the target viewpoint mainly appears in the depth discontinuous area, and the depth change of the background image is relatively gentle, and the local area can be divided into blocks to approximate the plane area, so that the method of homography transformation can be used for drawing, which is better It avoids the disadvantage that all pixels in the traditional method rely on depth information, reduces the holes and artifacts of the target viewpoint image, and improves the subjective and objective quality

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