Finding a curve within an image - tried findcircles but it didn't work

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Lara Dressere 2023-3-25

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https://ww2.mathworks.cn/matlabcentral/answers/1935209-finding-a-curve-within-an-image-tried-findcircles-but-it-didn-t-work

回答： Ranjeet 2023-5-2

I am trying to segment some images. I have found a way to filter them and segment them pretty well in most cases, but these images occasionally have issues when my image has the edge of a hole in it. I would still like to be able to analyse these images. First image attached is a good example, second is a bad example. Can anyone help me out? If anyone has any advice as how to go about segmenting these images in general better as well it would be greatly appreciated.

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Answer 1

Ranjeet 2023-5-2

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https://ww2.mathworks.cn/matlabcentral/answers/1935209-finding-a-curve-within-an-image-tried-findcircles-but-it-didn-t-work#answer_1227469

Hi Lara,

From your description, I understand that you are trying to detect partially visible circles in your images along with complete ones. I suggest you to experiment with Sensitivity parameter of imfindcircles. Increasing the ‘Sensitivity’ detects more circular objects including partially obscured ones.

You may trying different values and check the detections.