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How to get all the x,y coordinates of inner boundary of an image?

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Mathews Jabaraj Soloman 2020-6-14

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评论： Mathews Jabaraj Soloman 2020-6-17

采纳的回答： Image Analyst

I need to draw a polygon shape boundary over the image and access all the coordinate points inside the boundary-

Please help me to draw the arbitary shape boundry over an image and store all the coordinates of [x y] in a variable.

Thanks in advance.

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Image Analyst 2020-6-14

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See my attached freehand drawing/masking demo.

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Image Analyst 2020-6-17

You can use poly2mask() and bwboundaries(). It will get the boundaries of any blobs, whether exterior or interior (holes of the donut).

Mathews Jabaraj Soloman 2020-6-17

Yes, I will try that too

thanks again

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