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1、 University of Science & Technology of China GIS 2003 5 6 Hough Abstract In this paper, we apply the theory of digital image processing and pattern recognition to construct the system of Road Recognition and Extraction from Color City Traffic Map. We have already fulfilled the system working in open
2、-circle state. We also put forward a close-circle feedback system based on artificial neuro-network, which can extract the road network automatically. The theory of digital image processing involves gray segmentation, edge extraction, math morphology and Hough transformation. The theory of Pattern R
3、ecognition includes statistical pattern recognition, eigenvector extraction and selection, cluster analysis, template matching and artificial neuro-network. Keywords: gray segmentation, edge extraction, math morphology, Hough transformation, template matching, artificial neuro-network. i .i .1 .3 1.1 .3 1.2 .3 1.3 .4 .6 2.1 .6 2.2 .7 2.3 .8 2.3.1 .8 2.3.2 .13 2.3.3 .16 2.4 .18 2.4.1 Hough .18 2.4.2 Hough .19 2.4.3 Hough .20 2.4.4 Hough .21 2.4.5 Hough .22 2.4.6 Hough .22 2.5 .23 2.5.1 .23 2.5.2 .24 2.5.3 .26 2.5.4 .28 2.5.5 .29 .30 3.1 .30 3.1.1 .30 3.1.2 .30 3.2 .
