中圖分類(lèi)號(hào)：TP391.41 文獻(xiàn)標(biāo)志碼：A DOI: 10.16157/j.issn.0258-7998.223235 中文引用格式： 裴莊,，俞洋. 基于改進(jìn)Canny算子的打火機(jī)抓取點(diǎn)定位[J]. 電子技術(shù)應(yīng)用，2023,，49(6)：69-73. 英文引用格式： Pei Zhuang,，Yu Yang. Contour extraction based on histogram equalization and Canny operator[J]. Application of Electronic Technique，2023,，49(6)：69-73.
Contour extraction based on histogram equalization and Canny operator
Pei Zhuang,，Yu Yang
(School of Electric Information Engineering， Jiangsu University of Technology,， Changzhou 213001， China)
Abstract： In industry, image contour information extraction is beneficial to the positioning of the workpiece in the later stage, and the effect of contour information extraction directly affects the accuracy of template matching. The gradient information of traditional Canny operator is less, and the applicability of setting double threshold value artificially is low. In this paper, adaptive median filter is used instead of Gaussian filter. Sobel operator 45°, 135° direction templates are added. The double threshold is calculated iteratively by using the maximum difference between classes. The results of workpiece show that the improved algorithm can extract lighter contour information more accurately and suppress false edges, and can improve the matching positiong accuracy.
Key words : Canny,；linear interpolation,；adaptive median filtering；maximum variance between classes,；template matching
