Circle Recognition Algorithm Based on Freeman Chain Code
Lianyuan Jiang · Jisuanji gongcheng · 2007
This paper suggests and proves two properties of circle's Freeman chain code,the four odd numbers of eight-direction chain code are equal and also even number,the Freeman cycle chain code and its symmetric cycle chain code is the same.The new circle recognition algorithm based on Freeman chain is proposed,which only needs two parameters: the dissimilarity of eight-direction chain code,and the similarity of Freeman chain and its symmetric chain.Experiment results show that the method can recognize accurately the circles with high efficiency.