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《Journal of Changchun University of Science and Technology(Natural Science Edition)》 2007-03
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ICT Image Enhancement by Wavelet Based Homomorphic Filtering Method

ZHENG Dongmei1,SHI Junsheng1,SONG Xiaohui2,DAI Zhengguo2,WEI Hongqiang2,YU Mingfei3(1.Yunnan Normal University,Kunming,China,650000;2.Unit 63867,Baicheng,China,137001;3.Unit 93313,Changchun,China,130111)  
A new spatial frequency analysis method based on wavelet was applied to homomorphic filtering to enhance the contrast of ICT image.In order to attenuate the low spatial frequencies and amplify the high spatial frequencies,the wavelet analyzing coefficients are processed by a high-pass filter.So the local uneven distribution due to light source nonuniformity can be reduced and the object feature can be emphasized.Experiments indicated that the method performs well in enhancing the local contrast while maintaining its global appearance.
【CateGory Index】: TP391.41
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【References】
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【Citations】
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1 ZHANG Xin-ming,SHEN Lan-sun(Laboratory of Signal & Information Processing,Beijing Polytechnic University,Beijing 100022,China);Image Contrast Enhancement by Wavelet Based Homomorphic Filtering[J];Acta Electronica Sinica;2001-04
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【Co-citations】
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1 QU Yan-ping,YU Miao,GENG Xin (School of Materials,Shenyang University of Technology,Shenyang 110023,China);Rating System of the Nickel Coating Corrosion Protection Grade Based on Image Processing[J];Surface Technology;2008-01
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【Co-references】
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