Color Map / LUT Support for Images

[seantronsen]

Splitting up the original color map issue into a series of "sub-issues". Addressing this issue would involve implementing the features for LUT support to be applied to images.

[seantronsen]

We should also look into allowing users to display images using different color spaces. For a good example, OpenCV's bindings for Python typically read images in BGR format. Although converting between spaces is a trivial matter, requiring the user to convert each frame to RGB for "normal" looking image displays seems unreasonable.

I do think OpenCV has an option for their image read function that accomplishes this, but we could look into it. If it introduces a significant slowdown then the feature will be scrapped.

[seantronsen]

Following up on the comments above, cv2 has plenty support for LUTs and I now believe such an addition is outside the scope of the library goals.

However, I do think it would be wise to create some documentation for this which links to cv2's color mapping functions for single channel grayscale images.