Feature extraction from a map image

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Curious Mind
Curious Mind 2017-5-4
评论： Curious Mind 2017-5-4
Hello, if I have an image like the the one I have attached, how do I use matlab to extract the unique/distinct features in that map image? For the attached image, the image on the far left is the original image and while layers 1, 2 and 3 were extracted from the image on the far left. How do I use matlab to do such separation? Any code will help? Thank you.
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KSSV
KSSV 2017-5-4
You have not shown the axis limits...Are you sure that for all the images axis limits are same?

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