Feature extraction of images and graphics based on chain code description
In this paper, a new method was proposed on the basis of hierarchical structure model of image content. Distance chain code was put forward under relative polar coordinate system, as well as difference value code derived from the sum of accumulation of derivatives based on 8-direction chain code. Distance chain code was applied to extract internal structure category features, and the difference value code was used to extract the contour morphological characteristics. Then the algorithm extracting gradient, cloud anvil and concave of contour features was designed. The experimental results show that the extracted features have high separability between classes and the processing speed is fast. This method can be used to extract the features of non-rigid images.
NETL
NSTL
万方数据
维普
