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《Science Technology and Engineering》 2015-32
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Auto-focus Compresive Performance Evaluation and an Auto-focus Algorithm Based on Two-way Twice Descent

LIN Zhong;HUANG Chen-rong;LU A-li;College of Computer Engineering,Nanjing Institute of Technology;  
In order to improve the performance of classic climbing method while evaluating the performance of the new method. A robust auto-focus algorithm and a comprehensive performace evaluation method are proposed.First,the direction of the initial searching is determined by focal values on the initial focus position and its adjacent position. Then,a searching stratage with varialbe steps is executed until focal value decreases. Then,the two-way twice descent method is carried out to determine whether it is in a downward position of focal value function peak.Finally,from the downward position of focal value function,a single-step searching method is used for searching the focused position. Comparison of the proposed method and some classical methods used in two image sequences captured by 18 x digital high-definition cameras is demonstrated. The experimental results showed that: this method significantly reduces the in-focus position overturn steps and total moved distance. In addition,there is no obvious shortcomings on the other sub-index in this new auto-focus method. The comprehensive performance evaluation index of the new auto-focus method is 0. 98,and is higher than all the other methods.
【Fund】: 国家自然基金青年科学基金(61403188);; 南京工程学院校级科研基金(QKJB201305;YKJ201324;CKJA201306;QKJA201306)资助
【CateGory Index】: TP391.41
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【Citations】
Chinese Journal Full-text Database 3 Hits
1 XIE Xiao-fu1,2,ZHOU Jin1,WU Qin-zhang1(1.Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China);An Adaptive Autofocus Method Using No-reference Structural Sharpness[J];Opto-Electronic Engineering;2011-02
2 ZHU Zheng-tao~(1,2),LI Shao-fa~1,CHEN Hua-ping~2 (1.College of Computer Science and Engineering, South China Univ. of Tech., Guangzhou 510640,China;2.College of Information Engineering, Guangdong Univ. of Tech., Guangzhou 510640,China);Research on auto-focused function based on the image entropy[J];Optics and Precision Engineering;2004-05
3 XIE Qi;ZHANG Guang;School of Information Engineering,Zhengzhou University;;Auto focus algorithm based on high-definition network camera[J];Computer Engineering and Design;2014-09
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 ZHU Kong-feng(School of Electronic Science and Technology,Anhui University,Hefei 230039,China);An algorithm of focusing region selection for auto-focusing[J];Journal of Anhui University(Natural Sciences);2009-02
2 LIN Zhaohua1,2,LIU Xin1,WANG Lan1,ZHANG Shumei1(1.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Science,Changchun 130033,China; 2.Graduate School,Chinese Academy of Sciences,Beijing 100039,China);Application of MSP430 in Autofocus System of Theodolite[J];Electronics Optics & Control;2011-01
3 WANG Dai 1,2,WU Qin-zhang 1 (1.Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100049,China);Design of the Field Bus Applied in Optical Measuring Device[J];Opto-Electronic Engineering;2011-10
4 ZHANG Xi-wen1,WANG Xiao-dong1,LUO Yi1,TENG Lin2,CHEN Liang2(1.School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,Liaoning Province,China;2.Flight Automatic Control Research Institute,Aviation industry corporation of China,Xi'an 710065,China);Automatic Illumination of Microscopic Machine Vision Optimization for Precision Miniature Parts Automatic Assembly System[J];Opto-Electronic Engineering;2012-04
5 LIU Rui-an1,2,JIN Shi-jiu1,WU Xiao-rong2,ZHANG Xi-kun2 (1.State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University,Tianjin 300072,China;2.College of Physics and Electronic Information Science,Tianjin Normal University,Tianjin 300074,China);Adaptive regulation of CCD camera in eye gaze tracking system[J];Optics and Precision Engineering;2007-06
6 WANG Qian,SONG En-min,XU Xiang-yang,LIU Hong(School of Computer Science and Technology,Huazhong University of Science and Technology,Wuhan 430074,China);Auto-focusing function for microscope image based on weighted neighborhood correlation[J];Optics and Precision Engineering;2008-01
7 SUN Ming-lei,ZONG Guang-hua,BI Shu-sheng(School of Mechanical Engineering and Automation,Beihang University,Beijing 100083,China);Automatic focusing technique based on illumination optimum[J];Optics and Precision Engineering;2008-08
8 LIANG Min-hua1,2,WU Zhi-yong1, CHEN Tao1(1.Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130022,China;2.Graduate University of Chinese Academy of Sciences, Beijing 10039,China);Auto-focusing adjustment of theodolites by largest the gradient method[J];Optics and Precision Engineering;2009-12
9 FAN Yuan-yuan1,2,3,SHEN Xiang-heng1,SANG Ying-jun3(1.Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130033,China; 2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China; 3.Huaiyin Institute of Technology,Huaian 223003,China);No reference image sharpness assessment based on contrast sensitivity[J];Optics and Precision Engineering;2011-10
10 Gao Zan Jiang Wei Zhu Kongfeng Tao Junwei Chen Shuang Tian Chong(School of Information Science and Engineering,Shandong University, Ji'nan 250100);An Auto-Adaptive Algorithm to Auto-Focusing[J];Acta Optica Sinica;2006-10
China Proceedings of conference Full-text Database 1 Hits
1 Liang Min hua Cheng Tao (1 Changchun Institute of Optics,Fine Mechanics and Physics Changchun 130022 China; 2 Graduate School of the Chinese Academy of Sciences Beijing 100039 China);Research on Substitution of CMOS Camera for Cinematograph[A];[C];2008
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 HU Tao,CHEN Shi-zhe,LIU Guo-dong,PU Zhao-bang(Department of Automatic Measurement and Control,Harbin Institute of Technology,Harbin 150001,CHN);Selection of Auto-focus Function in Micro Visual System[J];Semiconductor Optoelectronics;2006-02
2 Guo Jun Zeng Wenhan Xie Tiebang (School of Mechanical Science & Engineering, Huazhong University of Science & Technology, Wuhan, 430074);A BULLET MARK COMPUTER IMAGE COMPARISON SYSTEM[J];Acta Armamentarii;2003-04
3 WANG Xin,AN Zhiyong,YANG Ruining(Changchun University of Science and Technology,The School of Photo-electronic Engineering,Changchun 130022);The Research of CCD Camera Auto-focusing Technology Based on Image Definition Criterion[J];Journal of Changchun University of Science and Technology(Natural Science Edition);2008-01
4 LIU Huan-yu1,2,XIONG Wen-zhuo1,WAN Qiu-hua1,ZHAO Chang-hai1,2,MU Zhi-guo1,2 (1.Changchun Institute of Optics,Fine Mechanics and Physics,the Chinese Academy of Sciences,Changchun 130033,China;2.Graduate School of the Chinese Academy of Sciences,Beijing 100039,China);Development of Automatic Focusing System Based on Image Processing Method[J];Journal of Test and Measurement Technology;2007-01
5 WANG Xin,LIU Chang(College of Computer Science and Technology,Changchun University of Technology,Changchun 130012,China);Algorithm of image definition evaluation based on lifting wavelet transform[J];Journal of Northeast Normal University(Natural Science Edition);2009-04
6 LIANG Cui-ping~(1,2),LI Qing-an~(1,2),QIAO Yanfeng~1,ZHU Wei~1(1.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Science,Changchun 130033,China; 2.Graduate School of Chinese Academy Science,Beijing 100039,China);On auto-focusing technology of optical system[J];Electronics Optics & Control;2006-06
7 Liu Lianjie Chen Peng Yang Leigang Yu Li ( College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023,China);A self-adaptive searching method for smooth auto-focus[J];Journal of Southeast University(Natural Science Edition);2010-S1
8 Jia Dongyao Chen Xi(School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China);Research of automatic focus method based on wavelet neural network[J];Journal of Electronic Measurement and Instrument;2012-05
9 CAI Chang-jin~ 1,2 ,ZHU Ming~1 1.Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; 2.Graduate School of the Chinese Academy of Sciences, Beijing 100039,China;Auto-Focusing System Based on DSP[J];Chinese Journal of Electron Devices;2007-01
10 WANG Xin1,2,WANG Hai-xia1,2,XU Shu-yan1,WANG Yong-cheng 1.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun Jinlin 130033,China;2.School of Graduate,Chinese Academy of Sciences,Beijing 100039,China;Study and Realization of Automatic Focusing Algorithm for Remote-Sensing Camera Based on Power Spectrum[J];Chinese Journal of Electron Devices;2007-03
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