Research On The Key Technologies Of Computer-aided Paper Fragments Reassembly

Computer-aided paper fragments reassembly is a novel and typical application in the field of computer vision and pattern recognition, which is completed through scanning and image extraction techniques to obtain the shape, color and other information. Then the paper fragments are reconstructed based on computer processing.The paper has an application background of judging by law and the paper aims at the research of some corresponding techniques and application in automatic reassembly of paper fragments which are torn up by hand. The research work can be organized in the following aspects.1) According to the theories of image pre-processing, the paper researches into the approach of image segmentation and edge detection and adopts the approach of color image segmentation and level set to image pre-processing based on automatic reassembly of paper fragments .It has a good result.2) The paper introduced a novel shape-matching algorithm based on automatic reassembly of paper fragments. First, the contour is represented by chain code, and then we find the possible matched contours by area rules and boundary rules, and computer—aided automatic paper fragments reassembly is also realized in this paper. The algorithm can be used to reconstruct of other similar fragments.3) The paper introduced an elastic curve matching method where the notion of an alignment curve is used to represent a correspondence between two curves. The space of alignment curves is searched for one optimizing elastic energy. At last the paper compares the two contour-shape matching algorithms and draws a conclusion that the first is better. 4)In the end of the paper, we introduce the system exploitation of automatic reassembly of paper fragments and provide the system function, the system design, the system flow chart.