How to evaluate image segmentation results?

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Tabish Raza 2013-3-17

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https://ww2.mathworks.cn/matlabcentral/answers/67546-how-to-evaluate-image-segmentation-results

评论： Image Analyst 2020-12-8

I am doing with some fuzzy c means clustering based image segmentation extension work. Can please any one put the idea how to do performance analysis with some parameter with new segmentation approach.

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Answer 1

Image Analyst 2013-3-17

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Have you tried tic and toc? Or the "Run and Time" tool on the "Home" tab?

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Tabish Raza 2013-3-17

i am looking for some evaluation parameter like PSNR,IEF etc which best describe your image segmentation evaluation.

Image Analyst 2013-3-17

PSNR is not appropriate for determining how well a segmentation did it's job, neither is SSIM or any of those other image comparison or image quality metrics. Only you can decide if your algorithm got the parts of the image that you think it should have. For example you can use roipoly() and poly2mask() to create binary images that have the "absolutely correct" segmentation. Then see how many pixels match in your algorithm's answer and your hand drawn answer. Alternatively you can use some other algorithm that you trust, rather than hand drawing regions, and see how your new algorithm compares to the trusted algorithm. But either way you have to get the "true" binary image for each test image if you want to see how your new algorithm compares to the "gold standard, true" segmentation.

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Answer 2

Anand 2013-3-18

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Two of the standard metrics used for image segmentation are dice overlap coefficient and jaccard index. These metrics measure the similarity between your segmentation and the expected segmentation output. This ofcourse means that you will need a "ground truth" segmentation result to compare against.

I found the following link that explains them nicely:

http://sve.loni.ucla.edu/instructions/metrics/

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Image Analyst 2013-3-18

Yes, those were the kinds of things I was thinking of. Nice to see that someone has thought it out more thoroughly. Thanks for the link.

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Answer 3

Sara Fadhil 2020-11-29

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i need math-lab code or the syntax for dice similarity coefficient,variation of information,universal quality index,global consistency error,compare image boundary error,Davis bound,Jacquard index......any one can help for this