I am interested in generating a color bar from a colored image.

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Abdul Wahab
Abdul Wahab 2019-3-24
评论： Image Analyst 2019-3-25
I have attached the image. What I would like is a color bar that displays all the colors on the figure. The figure represents elevation data.

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Image Analyst
Image Analyst 2019-3-24
If you don't know the colormap, then you will need the indexed image, not the RGB one.
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Abdul Wahab
Abdul Wahab 2019-3-25
How do I make a color bar of the colors displayed on the image to thre right?
Image Analyst
Image Analyst 2019-3-25
You can't but you mgiht be able to get roughly close if you have a gray scale image, and you map the gray scaled from 0-255 basically along the centroid of that colored snake-like gamut. Sorry, I don't have any code to automatically do that. Can you ask the image originator for the original gray scale image and the color map they used?

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