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Stereo Matching Based on a Speckle-projected Stereovision System

Author: LiMeiJu
Tutor: SuXianYu
School: Sichuan University
Course: Optics
Keywords: Three-dimensional sensing Binocular vision Stereo matching Digital speckle
CLC: TP391.41
Type: Master's thesis
Year: 2005
Downloads: 323
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Abstract


The three-dimensional scene information has important applications in many fields . Optical three-dimensional sensing different ways according to the lighting can be divided into active sensing and passive sensing . Binocular vision is the most widely used passive sensing sensing , flexible measuring the three-dimensional information of the scene in a variety of conditions . Stereo matching stereo vision , one of the most important and the most difficult problem , the special structure of the scene , such as the lack of texture detail , prone to false match limits binocular vision applications . Structured light in active optical system can increase the surface characteristics , taking into account the active optics system , decided to resort to a combination of active and passive sensing projection digital speckle binocular stereo vision system . Papers around the projector digital speckle binocular vision system , a detailed exposition of the concept of the position random digital speckle , binocular vision theory and gray stereo matching algorithm , a fast algorithm improves the traditional computing speed used a multi- window algorithm to enhance this system to hypermutation object matching capabilities . Finally, the system is applied to the measurement of various typical face are dense and accurate disparity map . Content and research results of this paper are as follows: the analysis of active sensing and passive sensing in two ways advantage based on a random digital speckle projection position binocular visual system , this system is particularly suitable for weak texture and no the three-dimensional reconstruction of the surface texture . 2 , related to the match in the most central part of the paper a detailed analysis of regional gray correlation matching algorithm . According to the characteristics of the system , a fast correlation algorithm is introduced in order to improve the calculation speed , using a multi-window algorithm effective solution to the high mutation region matching problems and improve the matching accuracy .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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