Assigning color to gray image

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Karina
Karina on 21 Apr 2014
Commented: Karina on 16 Jun 2014
I have a gray image (it's a flame) like the image below and I want to get something like the next image. I think I need to apply color and contour maps. But I don't know how to apply them. Thank you.

Accepted Answer

Image Analyst
Image Analyst on 21 Apr 2014
I'd just use colormap and not mess with contours unless you know what you're doing and what you want. To pseudocolor a grayscale image an leave it as grayscale but display it as colored:
imshow(grayImage);
colormap(jet(256));
colorbar;
To convert a grayscale image into a true color RGB image and display the RGB image instead of the pseudocolored image:
rgbImage = ind2rgb(grayImage, jet(256));
imshow(rgbImage);
You don't use color bars with RGB images.
  1 Comment
Karina
Karina on 16 Jun 2014
Thank you. That was the answer I was looking for.

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More Answers (1)

Walter Roberson
Walter Roberson on 21 Apr 2014
contourf(YourImageMatrix);
colormap(hot)

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