Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Progress In Geography》 2001-S1
Add to Favorite Get Latest Update

Invariant Features Extraction of Map Symbols

YE Jian-kao, LIU Yue (Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China)  
Feature extraction is the key of automated recognition of map symbols. Four two-dimensional invariant features of map symbols are summarized. The methods of the extraction of invariant features and a part of the experiment results are put forward.The four invariant features are the degree of complication of the periphery of the symbols , the breadth length ratio of the symbols, the proportion between the black pixels andall the pixels of a symbol, and the distance between the barycenter and the geometry center of a symbol.These four invariant feature parameters are characterized by invariability of rotation and size. A part of invariant characters has been proved in the paper. They are easy to be picked-up and the calculation is very simple.From the results of the experiment, we can see that the four feature parameters com-mendably describe the characters of the point symbols on maps, and they are not influenced by changing the size of scanning maps or rotating symbols and not disturbed by any noise of the image.The correctness ratio of automated recognition of point symbols on a map could be greatly increased through extracting and analyzing these four feature parameters.
【CateGory Index】: P284
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Chinese Journal Full-text Database 1 Hits
1 CHEN Fei~1 WANG Xiu-fang~2 NONG Yu~1 (1.School of Resource and Environment Sci.,Wuhan Univ.,Wuhan 430079,China;2 School of Remote Sensing and Info.Eng.,Wuhan Univ.,Wuhan 430079,China);Recognition of Point Symbols on Color Scanned Map[J];Journal of Sichuan University(Engineering Science Edition);2007-S1
China Proceedings of conference Full-text Database 1 Hits
1 CHEN Fei~1,WANG Xiu-fang~2,NONG Yu~1 (1.School of Resource and Environment Sci.,Wuhan Univ.,Wuhan 430079,China; 2 School of Remote Sensing and Info.Eng.,Wuhan Univ.,Wuhan 430079,China);Recognition of Point Symbols on Color Scanned Map[A];[C];2007
Chinese Journal Full-text Database 10 Hits
1 WANG Xiao-qing1, WEI Jun2, CHEN Su-jun3 (1. Dept. of Armament Products, NO.58 Research Institute of China Ordnance Industry, Mianyang 621000, China; 2. College of Economics & Information Engineering, Northwest Polytechnical University, Xi’an 710072, China; 3. College of Information Engineering, Yanshan University, Qinhuangdao 066000, China);Color Image Segmentation Based on Average Color-Difference[J];Ordnance Industry Automation;2006-10
2 LIU Hao xue (Beijing Institute of Graphic Communication, Beijing ,102600,China);The Application of CIE Uniform Color Space and Its Color Difference Formula[J];Journal of Beijing Institute of Graphic Communacation;2003-03
3 DUAN Yihong Lǖ Yuxia LI Jianli WU Wei XIAO Xuenian ZHANG Kun MA Xiaoping;Notes on the Development of Data Dictionary for Fundamental Geographic Information Features, Part 2 and Part 3[J];Standardization for Surveying and Mapping;2006-02
4 ZHANG Kun XIAO Xuenian ZHOU Yi MA Xiaoping DUAN Yihong L Yuxia;Comments On the Development of Specification for Feature Classification and Codes of Fundamental Geographic Information[J];Standardization for Surveying and Mapping;2006-03
5 Huan Wanqian(Dalian Naval Academy, Dalian, 116018);Neural Network Models of Map Symbol Recognition[J];ENGINEERING OF SURVEYING AND MAPPING;1998-02
6 ZHANG Tao, YIN Yong li, LIU Xiao lin (The University of National Defence Technology, Changsha 410073, China);Automatic Recognition of Point-Shaped Symbols in Scanned Maps[J];Engineering of Surveying and Mapping;2000-03
7 HE Xiaoying~ ① , SONG Weidong~ ① , HAN Yanshun~ ①② (①Liaoning Technical University, Fuxin 123000, China; ②Chinese Academy of Surveying and Mapping, Beijing 100039,China);The recognition of map symbols with neural network[J];Science of Surveying and Mapping;2006-01
8 DENG Xiao-guang WU Hua-yi LI De-ten ZHANG Han-wu;Research on Feature-based Classification and Coding of Fundamental Geographic Information[J];Bulletin of Surveying and Mapping;2008-04
9 WU Wenzhong,GUO Xincheng;An Introduction to National Fundamental Geographic Information Digital Product——Digital Line Graphs and Map[J];Bulletin of Surveying and Mapping;2011-12
10 ZHENG Huali, ZHOU Xianzhong, WANG Jianyu(Department of Automation, Nanjing University of Science &Technology , Nanjing 210094,China);Automatic Color Segmentation of Topographic Maps Based on Color Space Transformation and Fuzzy Restraint Clustering[J];Acta Geodaetica Et Cartographic Sinica;2003-02
【Secondary References】
Chinese Journal Full-text Database 1 Hits
1 FU Feng1, WANG Duan2(1.Faculty of Computer, Huanghuai University, Zhumadian 463000, China;2.Faculty of International, Huanghuai University, Zhumadian 463000, China);Research of point symbols recognition based on distance transformation and distortion[J];Computer Engineering and Design;2010-06
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved