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Scene global depth estimation method for multi-vision angle video image

A technology of video image and depth estimation, which is applied in image communication, image analysis, image data processing, etc., and can solve problems such as unsolved problems

Inactive Publication Date: 2008-07-16
SICHUAN PANOVASIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the estimation of the global depth information of the scene has also become an important problem in the multi-view video coding based on the MVD framework, but there is no related solution yet

Method used

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  • Scene global depth estimation method for multi-vision angle video image
  • Scene global depth estimation method for multi-vision angle video image
  • Scene global depth estimation method for multi-vision angle video image

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Experimental program
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Embodiment

[0114] In this embodiment, for convenience of description, a converging camera system composed of two cameras is taken as an example. Using the internal parameters A of the two cameras i (i∈1, 2) external parameter R i , t i (i ∈ 1, 2) and the view I formed under each camera system 1 with I 2 Do global depth estimation. Take view I 1 as the target view, view I 2 As the reference view, find the view I 1 The steps of the global depth value are as follows Figure 5 Shown:

[0115] Step 1: Compute the two cameras c 1 with c 2 The converging point of the optical axes of , the initial depth value of the scene under the camera coordinates is obtained.

[0116] According to formula (5), the depth value z of the convergence point in the two-camera coordinate system is obtained 1 0 and z 2 0 The linear equation for :

[0117] R 1 [ 0,0 , z 1 0 ] ...

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Abstract

The invention relates to the video signal processing technique. The invention provides a scene global depth estimation method of a multi-angle video image in the convergent camera system. The method comprises the following steps that: a. a depth value of a convergent point is taken as the depth initial estimate; b. the depth initial estimate is referred to determine the depth search range and the search step length of the global depth estimation; c. a pixel point of a target view corresponding to the pixel point in a reference view by the back projection and the double projection is calculated and a composite view in the reference camera system of the target view is obtained; d. within the depth search range, the searching is done in the search step length and the depth value with minimal error of the composite view and the reference view is taken as the scene global depth value of the target view. The invention has the advantages of estimating the global depth information of the multi-angle video image in the convergent camera system effectively and obtaining the depth information rapidly and effectively as well as directly.

Description

technical field [0001] The invention relates to video signal processing technology, in particular to a global depth estimation method for multi-view video images under a converged camera system. Background technique [0002] Multi-view video (Multi-view video) refers to the video signal obtained by shooting the same scene with multiple cameras in different directions. Base. Using multi-view video and image synthesis technology can generate video information of any viewing angle within the coverage of the camera, and observers can freely switch viewing angles according to their own preferences, thus obtaining a high-quality video viewing experience with interactive functions. Since multi-view video data doubles with the increase of the number of cameras, efficient compression coding of massive data in multi-view video has become a research hotspot in the field of video processing. MPEG, an international standard organization, began research on 3D audio and video (3DAV) as e...

Claims

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Application Information

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IPC IPC(8): H04N13/00G06T7/00
Inventor 张小云乔治L.杨
Owner SICHUAN PANOVASIC TECH