Finding circles in a microscopic image

2013 4 7
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Hi everyone, I'm doing a final project using image processing algorithms. As a part of the project i need to recognize 4 circles\elipsses that do not have the same radius and do not placed on the same place of the image. The image looks like the olympic logo. I know where the circles are on my image i don't know how to seperate the circles/elipsses.
Does anyone has an idea how to recognize the circles on the image without any user intervention.
Thanks! Shimrit

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Image Analyst
Image Analyst 2013-4-7

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Have you tried the imfindcircles() function in the Image Processing Toolbox?

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Image Analyst
Image Analyst 2013-4-7
You shouldn't have accepted this if it didn't solve your problem. You should have posted some of your images so we can try to see why there are no possible parameters that you can adjust imfindcircles() to that will detect your circles.

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Shimrit
Shimrit 2013-4-7

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I tried using this function and other functions that were on the web but the problem is that the circles are not perfect, they are not always a full circle and i dont know the centers of the circle or the radius. There are a lot of missing pieces here...

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