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《Journal of Computer Research and Development》 2002-12
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WANG Tao ①, LIU Wen Yin ②, SUN Jia Guang ①, and ZHANG Hong Jiang ② ①(Department of Computer Science and Technology, Tsinghua University, Beijing 100084) ②(Microsoft Research Asia, Beijing 100080)  
Fourier descriptor is an important method used in shape analysis and recognition. In this paper, an efficient and accurate method is used to calculate Fourier descriptors of the shape by polygonal approximation, and a method of removing the phase effect of the start point of the border through a shape's main orientation is presented. A new normalized Fourier descriptor is defined, which is invariant in the rotation, translation and scale transform. The experiments show the accuracy and efficiency of the new normalized Fourier descriptors in shape recognition.
【Fund】: 国家自然科学基金 (6990 2 0 0 4);; 国家重点攻关项目基金(2 0 0 1BA2 0 1A0 7)资助
【CateGory Index】: TP391.41
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