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The colormap represents a vector that has 3 elements (red, green, blue) for each luminance level from the image.
ie. colormap[i]=(255, 0, 0) would mean that level i is pure red. i is between 0 and 255.
algorithm
11 colormaps are implemented in the program and can be changed anytime for the user's taste.
example:
| grey colormap | hmetal colormap | 256 colormap |
 |  |  |
Only the look of the image is influenced by this function. The temperatures stay the same whatever colormap is used.
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