.Digital autofocusing method based on contourlet transform[J].Optoelectronics Letters,2007,3(5):381-384 Digital autofocusing method based on contourlet transform JIANG Gang-yi YI Wen-juan YU Mei YANG Ming [1]Faculty oflnformation Science and Engineering, Ningbo University, Ningbo 315211, China [2]China Mobile Shenzhen Limited, Shenzhen 518048, China [3]National Key Laboratory of Machine Perception, Peking University, Beijing 100871, China Abstract:       The autofocusing technique based on contourlet transform is discussed in this paper and an autofocusing method is proposed for images with much information in certain directions. The experimental results show that theproposed method can focus accurately and the sensitivity ratio is higher than that of the other autofocusing methods based on conventional image processing Hits: 3560 Download times: 196 View Full Text    Download reader