How to find the coordinate of the intersection multiple lines?

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Misha Patel 2017-7-11

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评论： Image Analyst 2017-7-12

If i have lines drawn on an image, how can I find the coordinate of the intersection of the lines? (multiple lines are intersecting)

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KSSV 2017-7-11

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Go through this file exchange: https://in.mathworks.com/matlabcentral/fileexchange/22441-curve-intersections?focused=5165138&tab=function

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KSSV 2017-7-12

You are providing....data points to line....

Image Analyst 2017-7-12

If you need the data at any arbitrary point, you have the two end points and can compute the line formula, so you have everything you need. If you want digitized/quantized coordinates, you can round the double numbers or you can look at Bresenham's line algorithm: https://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm

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Image Analyst 2017-7-11

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编辑：Image Analyst 2017-7-11

在 MATLAB Online 中打开

Use bwmorph() and ask for branchpoints on your skeletonized binary image.

crossings = bwmorph(binaryImage, 'branchpoints');

binaryImage should have only single pixel wide lines in it. Threshold it and call bwmorph(binaryImage, 'skel', inf) if you need to.

binaryImage = grayImage < 150; % Whatever...
skeletonImage = bwmorph(binaryImage, 'skel', inf); % Thin down to one pixel wide lines.
crossings = bwmorph(skeletonImage, 'branchpoints');

Also, see Steve's blog: http://blogs.mathworks.com/steve/2016/04/12/intersecting-curves-that-dont-intersect/