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《Journal of Shenzhen University(Science &engineering)》 2005-02
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An improved edge detection algorithm based on the Canny operator

WANG Na and LI Xia College of Information Engineering Shenzhen University Shenzhen 518060 P.R.China  
The capability of edge detection using the Canny operator was improved. Gradient computation and the determination of edge points were improved. Pixel gradients were calculated using the first-order derivative within eight neighborhoods instead of four, and the location of the edge was determined via the non-maximal suppression process, in which four-quadrant bilinear interpolation was applied to the eight neighborhoods of pixel gradients, thus improving the precision of the detected edge. Experimental results show that the new algorithm is efficient for edge detection, especially for detection of the outer boundary of the iris.
【Fund】: 广东省博士启动基金资助项目 (04300851);; 深圳市科技局资助项目 (200332)
【CateGory Index】: TP391.41
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