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[4]
Feature extraction using wavelet and fractal[J] . Yu Tao,Ernest C.M. Lam,Yuan Y. Tang.Pattern Recognition Letters . 2001 (3)
[5]
Maximal disk based histogram for shape retrieval .2 Wai-Pak Choi,Kin-Man Lam,Wan-Chi Siu. IEEE,ICASSP2003 . 2003