Is there a way to direct an algorithm in edge detection, or correct my drawing outline of the edge?

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Muser10101010 2015-6-24

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https://ww2.mathworks.cn/matlabcentral/answers/225198-is-there-a-way-to-direct-an-algorithm-in-edge-detection-or-correct-my-drawing-outline-of-the-edge

评论： Image Analyst 2015-6-24

I have some images that are difficult to detect the edges but I only need some simple selections done. I have written something that I can use ginput to outline the edge I wish to make but looking if there is any way to correct it using an edge detection, kind of line snapping a line to a grid?

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David Young 2015-6-24

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编辑：David Young 2015-6-24

This is exactly what active contours, or snakes, were originally designed for. If you have the Image Processing Toolbox, have a look at activecontour.