Application of chain codes table and line segment table in computer image processing

In view of the key point of exact digitalized description of image in image processing,chain codes table and line segment table are adopted to describe data structure of feature vector.In the process of image feature extraction,adopting contour tracking firstly,contour starting point is obtained with line scanning,then closed contour information---chain codes table is obtained with chain codes tracking technology,until all contours are tracked.Line segment table is obtained by linear conversion.Finally,features such as perimeter,area and so on are computed based on chain codes table and line segment table.The algorithm has been realized with Visual C++ and the results show that adopting chain codes table and line segment table can compute image geometry shape feature exactly.