Image retrieval algorithm based on IFS fractal code
Shunbao Li · Guangdian gongcheng · 2006
IFS fractal code which is the result of original image fractal coding can be used to retrieve image. In view of feature of image retrieval, the position parameter of IFS code is replaced with the relative distance and direction parameter. The distance between fractal codes and the distance of fractal codes between images are defined, and the preceding n frame images which are the smallest distance sum of fractal code are taken as the retrieval result. Thus, a fast algorithm of image retrieval on IFS code is presented. The retrieval time has a relation to the number of domain blocks by using the proposed algorithm. The experimental results show the algorithm has great stability with the translation and variation of illumination, and the mean of fractal code distance is only 14.07 and 20.05, respectively. The similarity images can be retrieved and the difference between inter-class and inner-class distance is about 8. The inner-class distance is much smaller than the inter-class distance.