MATLAB: Line length in image

image processinglenghtline

is there a way to get all the lenghts (in pixels) of curved lines in an images (like the one below)?

lenght being the total lenght of the lines (not just the the distance of X and Y)

Best Answer

Use bwdist() and look at the answer here for an example.

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MATLAB: Line detect the length of a pixel in image processing

There are thousands of vertical lines there, if you call a vertical line a series of white pixels in a single column with no breaks in it. You can count them simply by labeling the image using 4-connectivity

[labeledImage, numberOfRegions] = bwlabel(binaryImage, 4);

Now, some of those white blobs may be horizontal, or rounded blobs, so you might want to call regionprops and check the PixelIdxList property to make sure all the pixels in each blob are in the same column. Use unique on the x (column) coordinates for that.

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MATLAB: Line detect the length of a pixel in image processing

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