Research Of Two-Dimensional Speckle Deformation&Identification Based On Encoding Assistance

Vision measurement technology is a new measurement technique based on computer vision, which relates to machinery manufacturing, material mechanics, aerospace, image processing, virtual reality, photogrammetry, and digital image correlation method and so on.As an important content of computer vision measurement, research on speckle correlation detection technology has been a hot topic for researchers. This paper is aimed at the research of two-dimensional speckle image correlation detection technology. On the basis of this,encoded points has also been conducted a detailed study.Firstly, the principle and application of some kinds of encoded points are studied, and design principles and identification theory are studied, then we propose a new scheme of encoded points. Optimal analysis of practical usage is carried, including recognition algorithms and processing flow.Secondly, the two-dimensional speckle measurement theory is studied, including selection of correlation coefficient, two kinds of method to generate the simulated speckle, the manufacture of artificial speckle and displacement measurement algorithm, error analysis.This part is the core of two-dimensional speckle measurement.Finally, the whole procedure of the two-dimensional speckle deformation measurement is researched, including the analysis of the displacement field and the deformation displacement, then the relevant theoretical simulation and physical experiment are carried out,and finally the conclusion is drawn. In addition, the preliminary plan for the future study and work content is made.