Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Optics and Precision Engineering》 2004-05
Add to Favorite Get Latest Update

Research on auto-focused function based on the image entropy

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)  
Based on the definition of entropy in image, the application of the image entropy in auto-focused function is studied. It is found that there are two different rules in focusing function while using the image entropy. When the image is in the state of focus, one with the entropy is the largest, and the other with the entropy is the least. Through calculating and analyzing different kinds of test images, the existence of rule variance is confirmed, and the reason is analyzed. As the peak value and its shift are small, it is difficulty to find the largest in the four corners. Based on mean-square judge-function, a method weighted in condition is given, and an auto-focus judge-function with coherence rule is obtained. The experiment proves that the mean-square judge-function weighted in condition can enhance the peak of function and does not increase amount of calculation, so it can improve the veracity of judgement. If the test-condition does not change a lot, image entropy can be acted as an auto-focus judge-function through human-computer interface, otherwise the conditional weighted mean-square function is recommended.
【CateGory Index】: TP274
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【References】
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 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
4 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
5 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
6 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
7 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
8 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
9 Sun Jie Yuan Yuehui Wang Chuanyong(School of Electronic Information and Communication Engineering,Tianjin University of Technology,Tianjin 300191);Comparison and Analysis of Algorithms for Digital Image Processing in Autofocusing Criterion[J];Acta Optica Sinica;2007-01
10 WANG Jian 1,2,3,CHEN Hongbin 1,2,,ZHANG Xiaoming 1,2,3,AN Tao 1,2,,XIONG Shuai 1,2,3(1.Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China;2.Key Laboratory of Beam Control,Chinese Academy of Sciences,Chengdu 610209,China;3.University of Chinese Academy of Sciences,Beijing 100049,China);A Three-dimensional Auto-focusing System Based on Image Processing[J];Opto-Electronic Engineering;2013-02
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
【Citations】
Chinese Journal Full-text Database 9 Hits
1 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
2 KANG Zong-ming,ZHANG Li,XIE Pan(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China);Implementation of an Automatic Focusing Algorithm Based on Spatial High Frequency Energy and Entropy[J];Acta Electronica Sinica;2003-04
3 WANG Ren hua, SHEN Mang zuo (Institute of Optics & Electronics, Chinese Academy of Sciences,Chengdu 610209,China);An Algorithm Study for Automatic Focusing[J];Opto-electronic Engineering;2000-04
4 XU Jie 1, ZHANG Zhi jiang 2, LU Lin hai 1 (1.Electromechanical Engineering and Automatization Academy of Shanghai University, Shanghai 200072, China; 2.Communication Engineering Department of Shanghai University, Shanghai 200072, China);Image Processing for the Automatic Positioning System of Pellet Target[J];Optics and Precision Engineering;2001-06
5 LI QingJun(Changchun Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Changchun 130022);Studying on a New Method of Video Focusing[J];OPTICS AND PRECISION ENGINEERING;1998-03
6 Yan Fuqiang;Zhao Ronghua(Box 128,Beijing University of Post and Teleceremunication, Beijing 100088);STUDY OF AUTOFOCUSSING SYSTEM IN AUTOMATIC MEASURING OF OPTICAL FIBRE GEOMETRICAL PARAMETERS[J];ACTA PHOTONICA SINICA;1997-02
7 Li Wen en, Chen Haiqing, Li Jun, Xu Long ( Huazhong University of Science and Technology, Wuhan 430074 China);Image Manipulation and Auto-focus of the Infrared Seeker[J];Chinese Journal of Quantum Electronics;2003-03
8 Wu Zhenfeng Zuo Hongfu Qiu Genliang Liu Hongxing Department of Mechanical Engineering,Nanjing Univ ersity of Aeronautics & Astronautics Nanjing,210016;New Autofocus Algorithm of Microscope[J];JOURNAL OF DATA ACQUISITION & PROCESSING;2000-03
9 GUO Yan zhen, QIU Zong ming, LI Xin, WANG Ji hui (Xi’an University of Technology,Xi’an 710048,China);A Method of Tuning Focus for Image Measurement Technology[J];Journal of Xi'an University of Technology;2001-01
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 XUE Xiang-dong,WU Li-ming,DENG Yao-hua,WU Feng-jie,HE Zhong-kai(Information Engineering Institute,Guangdong University of Technology,Guang zhou 510643,China);Study on the New Method of CD Calibrating for IC Wafer[J];Semiconductor Technology;2005-12
2 ZHAO Li,xin,HU Song,WANG Zhao,zhi,LUO Zheng,quan,YAN Wei,HU Xiang,yu(Institute of Optic and Electronics,Chinese Academy of Sciences,Chengdu 610209,China);Auto,Focus of Laser Confocal Biochip Scanning[J];Micronanoelectronic Technology;2006-11
3 Sun Minglei Zong Guanghua Yu Zhiwei Bi Shusheng Yu Jingjun (School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China);Automatic focusing system of micro-vision based on image analysis[J];Journal of Beijing University of Aeronautics and Astronautics;2005-02
4 Zheng Jing et al;An Improved Autofocus Searching Algorithm and its Implementation[J];Computer Development & Applications;2010-01
5 Sun Guoqiang,Bai Shengwu(School of Technical Physics,Xidian University,Xi'an 710071,China);Study of the Image Auto-Focusing System Based on FPGA[J];Electronic Science and Technology;2010-07
6 TONG Qing-hua, YING Gen-yu, WANG Jian-ru (dept. of Electronics, Tsinghua University, Beijing 1000084, China);Development of Intelligent Measuring System for C PT Purity[J];Journal of Electron Devices;2005-01
7 PEI Xi-yu, FENG Hua-jun, LI Qi, XU Zhi-hai (State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China);A Depth from Defocus Auto-Focusing Method Based on Frequency Analysis[J];Opto-electronic Engineering;2003-05
8 LI Qi, FENG Hua-jun, XU Zhi-hai (State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China);Image pre-processing techniques for auto focusing[J];Opto-electronic Engineering;2004-09
9 CUI Ji-wen, TAN Jiu-bin, AO Lei, KANG Wen-jing (Institute of Ultra-precision Optoelectronic Instrument Engineering Harbin Institute of Technology, Harbin 150001,China);Automatic focusing method based on fuzzy control and image processing technique[J];Opto-electronic Engineering;2005-06
10 LIU Wen-yao,WANG Bing-zhen ( Key Laboratory of Opto-Electronics Information Science and Technology, Ministry of Education, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China );Focusing algorithm for image measurement of object with linear edge[J];Opto-electronic Engineering;2005-12
China Proceedings of conference Full-text Database 9 Hits
1 Deng LiXin Yang Zhen Zheng BaoYu (Department of Information Engineering of Nanjing University of Post and Telecommunications,P.O.Box 165,210003);A New Method of Voiced-Unvoiced-Silence Classifications Based on the Image Model Matching of Speech Waveform[A];[C];1999
2 Lin TuSheng Lai ShengLi Department of Electronics and Communication,South China University of Technology, Guangdong,Guangzhou,510641;A Branch-Removal Tracing Approach for Feature Extraction of Retina Blood Vessels[A];[C];1999
3 ;Feature Extraction of Arc-shaped Tool Traces[A];[C];2010
4 Zhang Peng Cao Xuedong Wu Shibin (The institute of optics and electronics of the Chinese academy of sciences of technology,Chengdu 610209,China);Sharp focus method of micro-lens and its validation[A];[C];2010
5 Zhang Hongjian1,2 Tian Weijian1,2 Zhang Wei1,2 Wang Li1,2 (1 Xi’an Institute of Optical and Precision mechanics of CAS Xi’an 710068) (2 Graduate School of the Chinese Academy Sciences Beijing 100039);Auto-focusing Method Based on Operator Fusion in the System for Coupling Optical-taper with CCD[A];[C];2004
6 HAN Ke~(1) JIANG Xue-mei~(1) FENG Quail~(2) ZHU Xiu-chang~(2) (1)(institute of Forensic Science,Ministry of Public Security,Beijing 100038) (2)(Image Processing and Image Communication Key Lab,Nanjing University of Posts and Telecommunications,Nanjing 210003);An Auto-focusing Method Based on Adaptive Evaluation Function for Many Object Distance Conditions[A];[C];2008
7 Wang Gui-tang, Liu Wen-hao, Lin Jin-xuan, Li Ke-ne, Wu Li-ming (GuangdongGuangzhou,Guangdong University of technology, Faculty of infonnation and engineering, 510643);The Analysis System of the Quantitative Phase and Micro-hardness[A];[C];2005
8 ZHANG Xi-Kun~1 LIU Rui-An~(1,2) HOU Jie~1 LI Wen-Qing~2 (1.Department of Physics and electronic information,Tianjin Normal University,Tianjin 300074,China; 2.University of Science CAUC,Tianjin 300300,China);Automatic Adjusting and Controlling of CCD objective in eye-gaze tracking system[A];[C];2007
9 Xiaoping Ren1, Y1 Li2, han Wang1, Minqin Gu2, Qingxiong Ren3 1. National Institute of Metrology; Beijing, 100013.P.R.China;2. School of Information Science & Engineering, Central South University;Changsha 410083, P.R.China3. Shanxi Institute of Metrology Supervision&Verification, Taiyuan 030002. P.R.China;Error Detection and Elimination Method in Bullet Comparison and Matching[A];[C];2013
【Co-references】
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 XIONG Ping (Chongqing Optoelectronics Research Institute, Chongqing 400060, CHN);Comparison of CCD and CMOS Image Sensors[J];Semiconductor Optoelectronics;2004-01
3 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
4 SHEN Shao-wei,YAN Shu-hua,ZHOU Chun-lei,LI E,TONG Hui-peng(College of Mechatronics Engineering and Automation,National University of Defense Technology,Changsha 410073,CHN);Research of Automatic Detection Technology of Thread Parameters Based on CCD Vision[J];Semiconductor Optoelectronics;2007-06
5 LIU Jing ( Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China);Research and Application of Micro/Nano Tweezers: The Tool of Manipulating the Micro World[J];Micronanoelectronic Technology;2005-03
6 ZHAO Li,xin,HU Song,WANG Zhao,zhi,LUO Zheng,quan,YAN Wei,HU Xiang,yu(Institute of Optic and Electronics,Chinese Academy of Sciences,Chengdu 610209,China);Auto,Focus of Laser Confocal Biochip Scanning[J];Micronanoelectronic Technology;2006-11
7 Cheng Kaifu (Chongqing Optoelectronic Institute,Chongqing 400060);Recent Development of Novel Active Pixel Sensors[J];SEMICONDUCTOR INFORMATION;1999-02
8 FAN Jian-ying, YU Xiao-yang, LIU Bo, XU Wan-li (College of Instrument and Meter, HUST, Ha'erbin 150080, China);Development of 3D-Vision Sensing Technique[J];ORDNACE INDUSTRY AUTOMATION;2000-02
9 Song Min(Physics department, Liaoning Normal University, Dalian, 116029)Li Yefang; Xiang Shifa(Dalian University of Technology);A NEW METHOD FOR MEASURING MODULATION TRANSFER FUNCTION OF CHARGE COUPLED DEVICES[J];Acta Armamentarii;1998-04
10 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
China Proceedings of conference Full-text Database 1 Hits
1 HE Chuan LIN Jiaming SHA Dingguo JI Rong (Department of Optical Engineering, Beijing Institute of Technology, Beijing 100081);Application of Double Frequency Laser Interferometer in Curvature Radius Measurement[A];[C];2005
【Secondary References】
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 LI Shan-shan et al (College of Resource Environment and Tourism,Capital Normal University,Beijing 100048);An Automatic Wavelet Focusing Method of the Aerial Camera Based on CCD Mosaicing[J];Journal of Anhui Agricultural Sciences;2012-03
3 Liu Chuntong,Wang Dongbo,He Zhenxin,Cai Ke(No.202 Staff Room,Second Artillery Engineering College,Xi'an 710025);Centering Measurement of Theodolite Based on Digital Image Processing[J];Ordnance Industry Automation;2011-07
4 CHENG Liang-lun,PAN Jian-hua(School of Automation,Guangdong University of Technology,Guangzhou 510006,China);Research of high precision fast focus method for optical auto-detector[J];Transducer and Microsystem Technologies;2011-02
5 HAN Li-yan,WANG Li-ming,LIU Bin (Institute of signal capturing and processing,North University of China, Taiyuan 030051,China);Depth measuring method based on using Edge Spread Function to describe defocusing degrees of images[J];Sensor World;2011-02
6 LV Pei-yu1,ZHANG Chun-sen1,WANG Yan-liang2,LV Jing-fan3(1.Xi'an University of Science and Technology,Xi'an 710054,China;2.School of Surveying and Mapping Engineering,Heilongjiang Institute of Technology,Harbin 150050,China;3.Jilin Institute of Geographic Information Engineering,Changchun 130051,China);The application of sight mouse in map scanning[J];Engineering of Surveying and Mapping;2012-02
7 WANG Chuanzhong,MO Lingshan(Information Engineering College,Nanchang Hangkong University,Nanchang 330063,China);Sharpness Measurement for Microscopic Cell Image of Variable Content[J];Journal of Test and Measurement Technology;2012-02
8 LIU Xiaobin,TU Dianliu,CHAI Bin,SHAN Fuyuan(The 45th Research Institute of CETC,Beijing 101601,China);An Analysis of the Automatic focusing System of the Grinding Wheel Dicing Saw[J];Equipment for Electronic Products Manufacturing;2011-02
9 LI Shanshan 1,2,3,4,GONG Huili1,2,3,4,LIU Yang 5 and HU Zhuowei1,2,3,4 (1.College of Resource Environment and Tourism,Capital Normal University,Beijing100048,China; 2.Key Laboratory of 3D Information and Acquisition and Application,MOE,Beijing100048,China; 3.Beijing Municipal Laboratory of Resources Environment and GIS,Beijing100048,China; 4.Key Laboratory of Integrated Disaster Assessment and Risk Governance,MCA,Beijing100048,China; 5.School of Astronautic,Harbin Institute of Technology,Harbin150001,China);A Wavelet Auto-focusing Method of the Aerial Camera Based on CCD Mosaicing[J];Journal of Geo-Information Science;2012-01
10 Gao Zan Jiang Wei Zhu Kongfeng(School of Information Science and Engineering, Shandong University, Jinan, 250100, China);Auto-focusing Algorithm Based on Most Gradient and Threshold[J];Journal of Electronic Measurement and Instrument;2007-05
China Proceedings of conference Full-text Database 3 Hits
1 WANG Kun, GAO Li-qun (College of Information Science and Engineering, Northeastern University, Shenyang 110004, China.;A New Approach for Image Quality Estimate[A];[C];2006
2 LI Ming-ming,WANG Xin-sai,LI Jian(Joint Lab for Infrared Imaging and Navigation Technologies,Air Defense Forces Command Academy,Zhengzhou 450052,China);Comparative study on the auto-focus definition function based on the image processing[A];[C];2010
3 WANG Yu-qing;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences;;Fusion image assessment based on local variance and singular value decomposition[A];[C];
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 Tian Wanchen, Piao Zhenggen;A Study on Automatic Focussing of Optical Lens in TV Camera[J];Video Engineering;1987-04
2 XU Sheng, LI Jian wei (Open Laboratory of Optoelectronic Technology & System,National Committee of Education, Chongqing University, Chongqing 400044,China);An Advanced Microscope System Based on the Intelligent Automatic Focusing[J];OPTO-ELECTRONIC ENGINEERING;2000-01
3 WANG Ren hua, SHEN Mang zuo (Institute of Optics & Electronics, Chinese Academy of Sciences,Chengdu 610209,China);An Algorithm Study for Automatic Focusing[J];Opto-electronic Engineering;2000-04
4 ZHOU Fu qiang, ZHU Ji gui, YANG Xue you, YE Sheng hua(State Key Lab. of Precision Measuring Technology & Instruments, Tianjin University 300072, China);A high speed CCD camera calibration technique[J];OPTICS AND PRECISION ENGINEERING;2000-01
5 TONG Shou feng, RUAN Jin, HAO Zhi hang(Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130021, China);Noise reducing scheme on output signal of CCD[J];OPTICS AND PRECISION ENGINEERING;2000-02
6 CHEN Xiao-zhong, SUN Hua-yan(Department of Measuring and Control,Institute of Command and Technology,Beijing Huairou 101416,China);Targets detection method for image under nature texture background[J];OPTICS AND PRECISION ENGINEERING;2000-05
7 Gan Minliang(Civil Aviation College, NUAA Nanjing,210016)Liu Yuping(Department of Power Engineering, NUAA Nanjing,210016);Implementation of Automatic ImageAcquisition with a Microscope[J];JOURNAL OF NANJING UNIVERSITY OF AERONAUTICS & ASTRONAUTICS;1998-02
8 Xu Jiapin (Department of Radio Electroncs);THE APPLICATION OF ADAPTIVE KALMAN FILTER TO CCD MEASURE SYSTEM[J];JOURNAL OF SICHUAN UNIVERSITY (NATURAL SCIENCE EDITION);1997-04
9 GUO Yan zhen, QIU Zong ming, LI Xin, WANG Ji hui (Xi’an University of Technology,Xi’an 710048,China);A Method of Tuning Focus for Image Measurement Technology[J];Journal of Xi'an University of Technology;2001-01
10 Bai Lifen Xu Yuxian Yu Shui Li Qingxiang (Dept. of Precision Instrument and Mechanology of Tsinghua Univ.Beijing 100084);Study on the Microscope Auto focus Method Based on Image Processing[J];CHINESE JOURNAL OF SCIENTIFIC INSTRUMENT;1999-06
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved