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Method for drawing virtual view image

A virtual viewpoint and image rendering technology, applied in the field of virtual viewpoint image rendering, can solve the problem of high computational complexity

Inactive Publication Date: 2009-10-14
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to ensure the accuracy of rendering, the existing virtual viewpoint image rendering algorithm based on depth image generally adopts the mapping method of 3D image warping pixel by pixel, so the calculation complexity is too high, and there are still some problems in meeting the real-time viewing requirements. difficulty

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  • Method for drawing virtual view image

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] The virtual viewpoint image drawing method of the present invention comprises the following specific steps:

[0041] ① Acquire K color images of size P×Q at K reference viewpoints at time t and K depth images corresponding to K color images, and record the color image of the kth reference viewpoint at time t as I R，t k , denote the depth image of the kth reference viewpoint at time t as D R，t k , in this specific embodiment directly adopt existing such as Figure 1a with Figure 1b The color images of the two reference viewpoints are shown in , and the corresponding two depth images are as follows Figure 2a with Figure 2b As shown, the sizes of the two color images and the two depth images are both 1024×768, that is, K=2, P=1024, and Q=768.

[0042] The color image I of the kth reference viewpoint at time t R，t k divided into ...

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Abstract

The invention discloses a method for drawing a virtual view image, which has the advantages of dividing the color image of a reference view into a plurality of blocks with same sizes and judging the flatness of each block; for flat blocks, 3D image conversion is only needed to be executed to one pixel point in the block so as to confirm the coordinate mapping relation of projecting the pixel point from the color image of the reference view to the color image of a visual view; and then the whole block is projected into the color image of the visual view by adopting the coordinate mapping relation. As the 3D image conversion is only executed to one pixel point; the drawing speed of the flat blocks can be effectively improved; while for non-flat blocks, the 3D image conversion of per pixel mapping is still adopted to map each pixel point in the non-flat blocks to the color image of the virtual view needing to be drawn, thus being capable of effectively ensuring the drawing precision; the combination of the two greatly improves the drawing speed simultaneously when ensuring the drawing precision of the color image of the virtual view.

Description

technical field [0001] The invention relates to a free viewpoint television technology, in particular to a virtual viewpoint image drawing method in a free viewpoint television. Background technique [0002] Free viewpoint TV (Free viewpoint TV, FTV) is an advanced visual mode, which has interactivity and a sense of presence, and can meet people's needs for watching three-dimensional scenes from different angles. A free-viewpoint TV system usually consists of several parts such as multi-viewpoint video signal acquisition, correction, encoding, network transmission, decoding, drawing and display. [0003] Rendering based on color images is one of the key technologies of the free-viewpoint television system. It is a method of drawing and generating virtual viewpoint images from a series of known reference viewpoint color images. Compared with the traditional rendering technology, it has the advantages of not needing complex 3D scene modeling, fast rendering speed, suitable fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/20G06T7/00H04N13/00G06T15/00
Inventor 蒋刚毅郁梅朱波
Owner NINGBO UNIV
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