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Upper sampling method used for depth picture of three-dimensional stereo video

A three-dimensional, depth-based technology applied in the field of image processing

Active Publication Date: 2012-10-31
TSINGHUA UNIV
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  • Claims
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Problems solved by technology

However, the existing upsampling methods that use color pictures as guidance are not learning-based algorithms, so there is room for further improvement in the quality of upsampling.

Method used

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  • Upper sampling method used for depth picture of three-dimensional stereo video
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  • Upper sampling method used for depth picture of three-dimensional stereo video

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Embodiment Construction

[0034] The up-sampling method for the depth picture of the three-dimensional stereoscopic video proposed by the present invention, its flow chart is as follows figure 1 shown, including the following steps:

[0035] (1) Define α as the upsampling rate of the 3D stereoscopic video depth picture, S L Divide the depth picture of the low-resolution 3D stereoscopic video into pixel blocks (the size of each low-resolution depth picture block is S L ×S L ), S H In order to divide the high-resolution depth picture obtained after upsampling the depth picture of the low-resolution 3D stereoscopic video into the size of the pixel block and divide the collected color picture into the size of the pixel block, S H = S L ×α; for example, the upsampling rate α=2 means that the length and width of the depth image will be doubled before, and the choice of S L =8, then S H =16, so that the low-resolution depth image is divided into 8×8 pixel blocks, and the high-resolution depth map and co...

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Abstract

The invention relates to an upper sampling method used for a depth picture of a three-dimensional stereo video, belonging to the technical field of image processing. The method comprises the following steps of firstly training three mutually associated databases, namely a low resolution depth picture block library, a color picture block library and a high resolution depth picture block library; cutting the three databases into picture blocks when a new low resolution depth picture and corresponding color picture library are input, and then solving the sparse linear representation thereof in the low resolution depth picture library and the color picture library in a combined way; and reconstructing a high resolution depth picture on the high resolution depth picture library through the linear representation. According to the method provided by the invention, higher depth picture recovery quality can be obtained compared with the conventional method; the high resolution depth picture with a higher quality can be obtained; and particularly, more ideal effect for the acquired depth picture which has a very low quality can be realized by the method as validated by experiment.

Description

technical field [0001] The invention relates to an upsampling method for a depth picture of a three-dimensional stereoscopic video, belonging to the technical field of image processing. Background technique [0002] Three-dimensional stereoscopic video has replaced traditional two-dimensional color TV in many applications, because it can bring users a brand-new viewing experience: users can obtain a more realistic three-dimensional scene experience and feeling, and can freely choose the viewing point of view and watch it at any time Switch between different viewpoints. Compared with traditional 2D video, 3D stereoscopic video has great advantages in visual effect and user interaction, making 3D stereoscopic video a research hotspot, and has been rapidly developed and popularized. [0003] At present, a commonly used 3D stereoscopic video display technology is "color video + depth video" technology: one channel of color video is used to express texture information, and one c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/00H04N13/02
Inventor 孙立峰李彥洁
Owner TSINGHUA UNIV
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