An Efficient Contour Tracking and Coding Algorithm Based on Vertex Chain Code

Based on analysis of contours of irregular region, and according to the characteristic that massive continuous code and the same specific code combination are usually contained in a region boundary´s vertex chain code, a new effective contour tracking algorithm and representation method based on the pixel vertex matrix is proposed. Moreover, we re-encoding the new vertex chain code using a Huffman coding strategy and then select the more compressed result as the output. The results showed that the new method could effectively reduce code stream for contours, hence increase the compression ratio of the image.