Multi-view stereoscopic video acquisition system and camera parameter calibrating method thereof

Abstract

The invention provides a multi-view stereoscopic video acquisition system and a camera parameter calibrating method thereof. The method comprises the following steps of obtaining inside and outside parameters of cameras in the system, acquiring multi-view images of common scenes by the cameras at the same time, detecting and matching characteristic points of the multi-view images to obtain matching points among the view images, utilizing the parameters of the cameras to reconstruct and obtain three-dimensional space point cloud coordinates of the matching points among the view images, conducting adjustment and optimization with a thin bundle set to obtain a reprojection error according to the three-dimensional space point cloud coordinates and the inside and outside parameters of the cameras, optimizing the reprojection error and the inside and outside parameters of the cameras, judging whether to conduct secondary optimization according to the optimized reprojection error, and judging whether to recalibrate the parameters according to a secondary optimization result. According to the camera parameter calibrating method, with the adoption of detecting and matching of the characteristic points and adjusting and optimizing of the thin bundle set, the complicated parameter calibration of the cameras is avoided; and the acquisition efficiency of a stereoscopic video is improved.

Description

technical field [0001] The invention relates to the field of computer image processing, in particular to a multi-eye stereo video acquisition system and a camera parameter calibration method thereof. Background technique [0002] With the advancement of technology, multi-view and high-quality video information can be provided, so multi-eye stereoscopic video acquisition has increasingly become the main method of generating high-quality stereoscopic video sources. [0003] The traditional camera parameter calibration and calibration process need to collect multiple frames of multi-viewpoint images of auxiliary calibration objects in different poses, and each frame of multi-viewpoint images must see auxiliary calibration objects in a large enough area. The calibration is limited and the process is cumbersome. Difficult to use. Contents of the invention [0004] The object of the present invention is to solve at least one of the above-mentioned technical drawbacks. [0005]...

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Problems solved by technology

[0003] The traditional camera parameter calibration and calibration process need to collect multiple frames of multi-viewpoint images of auxiliary calibration objects in different poses, and each frame of multi-viewpoint images must see auxiliary calibration objects in a large enough area. The calibration is limited and the process is cumbersome. Difficult to use

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