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《Acta Photonica Sinica》 2005-09
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Image Enhancement Based on Edge-directed Diffusion

Xie Meihua,Wang ZhengmingNational University of Defense Technology,Hunan Changsha 410073  
Since forward and backward diffusion cannot hold flow-like edges,and coherence enhancement diffusion cannot sharpen edges,a new edge-directed nonlinear diffusion equation to enhance image is put forward.The new model introduces forward and backward diffusion to the tensor diffusion,and gets a new diffusivity,which combines the merits of these two methods.The new model adapts an operator like coherence enhancement diffusion for edge orientation,and defines eigenvalues based on edge′s orientation such that the new tensor has positive diffusion coefficient in edge direction and negative diffusion coefficient in gradient direction.Both theory analysis and numerical results show that the new model has better enhancement result than coherence enhancing diffusion and forward and backward diffusion.
【Fund】: 全国优秀博士论文作者专项基金(批准号:200140);; 国家自然科学基金(批准号:60272013)资助
【CateGory Index】: TP391.41;
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【References】
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【Citations】
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1 Zhang Feng, Jiang Yifeng, Chen Zhencheng, Jiang Dazong Institute of Biomedical Engineering, Xi'an Jiaotong University,Xi'an, Shaanxi, China 710049;Evaluation of a New Adaptive Contrast Enhancement Algorithm Based on Local Standard Deviation[J];Acta Photonica Sinica;2003-08
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【Co-citations】
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1 HE Ru-yun,WANG Yao-nan(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China);InSAR Interferogram Filtering Based on Wavelet Transform[J];Acta Geodaetica et Cartographica Sinica;2006-02
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3 ZHANG Liang-pei,WANG Yi,LI Ping-xiang(State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan,Hubei 430079,China);The Filtering Algorithm for SAR Image Speckle Noise Based on Anisotropic Diffusion[J];Acta Electronica Sinica;2006-12
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5 Yuan Libo1,Lin Pei2, Xiao Dehang3 1 Department of Physics, School of Science, Harbin Engineering University, Harbin 1500012 Jamusi College, Heilongjiang Trditional Medicine University, Jiamusi 1540073 School of Technical Physics, Heilongjiang University,Harbin 150076;The Optical Output Field Interference Theoretical Model and Experimental Results of Three Fibers End Arranged in Right Triangle[J];Acta Photonica Sinica;2004-10
6 Wang Bingjian,Liu Shangqian,Zhou Huixin,Li Qing School of Technical Physics, Xidian University, Xi′an 710071;Self-adaptive Contrast Enhancement Algorithm for Infrared Images Based on Plateau Histogram[J];Acta Photonica Sinica;2005-02
7 Su Tao,Zhuang Dejing,Wu Shunjun Key Laboratory of Radar Signal Processing, Xidian University, Xi′an 710071;Fast Algorithm for Real Time SAR Imaging and Implementation Optimizing[J];Acta Photonica Sinica;2005-06
8 Zheng Gang,Jia ZhenhongInformation Science & Engineering,University of Xinjiang,Urumqi 830046;Application of Homomorphic Technologyin in Infrared Images Processing[J];Acta Photonica Sinica;2005-09
9 Zhang Fan 1,2, Xue Lijun 1,2, Li Zitian 1,2, Wu Xiaohua 1,2 1 Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi′an 710068 2 Graduate School of Chinese Academy of Sciences, Beijing 100039;Design of a CCD Biochip Scanning and Analyzing System[J];Acta Photonica Sinica;2006-04
10 Fan Wei~1, Wang Yi~2, Rao Ruizhong~1 1 Atmospheric Optics Center, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences,Hefei 230031 2 Department of Atmospheric Sciences,Nanjing University,Nanjing 210039 Fan Wei was born in April, 1977, Hefei, Anhui Province. He received his M.S. degree from Anhui Institute of Optics & Fine Mechanics of CAS. Now He is a doctor graduate in Optical Department, Atmospheric Optics center of Anhui Institute of Optics & Fine Mechanics of CAS. His current researches primarily focus on atmospheric radiative transfer, information process and target detection.;Wavelength Band Selection Method for Target Detection Considering Surface Reflectivity[J];Acta Photonica Sinica;2006-05
【Co-references】
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【Secondary References】
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