Binocular Stereo Vision Calibration Technology In The Reverse Engineering Of The Applied Research

Reverse engineering is an intergrated use of computer vision, computer graphics, computer image processing, differential geometry, computational geometry, pattern recognition,numerical analysis,data structures and software engineering and CAD the most active areas of research branch.How fast,accurate access to the surface of the measured object model measurements and processing of these data,three-dimensional model to achieve reconstruction,interactive design and innovative design,repaid prototyping in order to put on the market is kind of the reverse design on a key issue.Use of three-dimensional visual realization of the object model is three-dimension reconstruction of the present Reverse Engineering a hot issue,this paper is mainly for reverse engineering to achieve the ultimate aim of using binocular stereo vision to achieve this process some of the key theories and techniques analysis of the building to achieve the purpose experimental system.Focused on using stereoscopic 3D calibration of a camera calibration and three-dimensional coordinates of space at the data put together for the achievement of theoretical analysis and experimental analysis of the relevant.Experimental machine vision system is mainly used as the theoretical basis, constructed from two CMOS cameras constitute the binocular stereo vision experimental system. Superscript positioned at the image coordinates from the use of the two methods of OPENCV use in the extraction of the two methods were used to strike a BLOB round of the quality of the heart and strike a checkerboard grid method-corner approach to the acquisition, these two methods can be reached sub- pixel. Calibration method Tsai and Zhang are more commonly used methods. Because Zhang calibration equipment calibration minimum requirements, and reach a certain number of reference points when the calibration accuracy and stability at the higher, experiment used Zhang's mothed. So ZHANG used for the calibration method is proposed in a picture in the calibration plate block access to more information and pictures of this 3-D space calibration, through experiments show that the calibration method can be realized, could reach the 2-D planar template calibration the accuracy of the same methods. In the physical demarcation after achieving a three-dimensional model of information retrieval, and from different angles to get the image restoration of the three-dimensional coordinate data registration of technical analysis theory.Implementation of the system in the process of realization of several images preprocessing technology and the achievement of several edge detection technologies, and compared. Achieve a two-dimensional image corner detection based on the template corner and Harris corner detection. Using the SIFT of strongest feature extraction algorithm analysis, and use it for image matching approach. Implementation of based on the mathematical morphology edge detection matching,and implementation the image matching based on the characteristics of Harris corner image matching.