Canny edge detectorThe Canny edge detector is an edge detection operator that uses a multi-stage algorithm to detect a wide range of edges in images. It was developed by John F. Canny in 1986. Canny also produced a computational theory of edge detection explaining why the technique works.https://en.wikipedia.org/wiki/Canny_edge_detector영상의 edge detection (Sobel, Canny Edge) 원리와 사용법gaussian37's bloghttps://gaussian37.github.io/vision-concept-edge_detection/