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《Electronic Technology》 2017-07
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Design of Face Sketch System Based on Improved Sobel Operator

Gao Long;Zhou Shigui;College of Engineering, Qufu Normal University;  
Face Automatic Sketch(FASK) is a special application in edge detection technology. For the implementation difficulty of the edge detection algorithms in face automatic sketch applications, the FAS system is designed in which MK60DN512VLQ10 microcontroller is employed for core control unit. Sensor OV7620 with low power CMOS image sensor is used in this system for face information acquisition. An improved Sobel operator is proposed for facial contour extraction which uses four directions template in directions 45 °, 135 °, 225 ° and 315 ° for edge detection. Using the redistribution of the weights in the template, the edges in different directions are detected accurately by the direction templates, which can overcome the shortcoming of low precision and roughness wherefore the accuracy and continuity of the edge detection can be improved. The information of extracted edges is outputted after the processing of the edge refinement and binarization, which control the horizontal and vertical stepping motor separately for accurate depiction of face contours. The results show that the improved Sobel operator can extract the contours of the human face quickly and accurately, and the system can finish the sketches better.
【Fund】: 山东省自然科学基金面上项目(ZR2014EEM013);; 校级科研项目(XKJ201308);; 大学生创新创业项目(2016092)
【CateGory Index】: TP391.41
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