Accurate Color Mappings

[callan]

Currently the color mapping for multi-channel data is a little bit subjective if the emission wavelength for the channel is not present.

The following rules should be adhered to if possible for a given image:

• If the image has a Photometric Interpretation of "Monochrome", emission wavelength should dictate color choice if present.
• If an image with a Photometric Interpretation of "RGB" has a Color Component attached to the given channel then that color should be used.
• If all else fails...
  • Channel 0 should be mapped to Red
  • Channel 1 should be mapped to Green
  • Channel 2 should be mapped to Blue
• If the image only has a single wavelength it should be rendered greyscale

[callan]

Implemented in r1348.