How to cluster heat maps?

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Abhishek Singh 2019-6-26

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评论： Abhishek Singh 2019-6-29

Hi,

I have some contour heatmaps with 5 or 6 categorized pressure points for different channels (y-axis). The yellow shade means high pressure and blue is lower end. I was wondering if there is already an algorithm which clusters the heat maps into groups. For instance the one I am pasting here has some patches of yellow and I have some more similar graphs. Now I want that my algorithm should categorize them according to some cluster it defines intuitively or explicitly. So it gives me a "n" number of different clusters for lets say 100 plots and then I can work on it or optimize it if possible. Please help. Thank you so much.

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回答（1 个）

Image Analyst 2019-6-27

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Perhaps you just want to threshold top get a binary image of each pressure range.

pressureRange1 = pressureImage >= lowThreshold & pressureImage <= highThreshold;

or perhaps you want to use imquantize(). Then you can call colormap() to colorize the quantized image.

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Image Analyst 2019-6-29

Maybe you should look at image similarity metrics like ssim().

Abhishek Singh 2019-6-29

Yes. This one looks like something that could help me. Though it gives a very high value for not so similar images I think I still can set high value like 0.95 as ssim value and that will also help me to avoid creaating different zones. I hope this will work. Thank you so much for the help.

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