Interesting. Perhaps this information is not available with the images? or are they.
The conversion between RGB and CIELAB is almost meaningless (according to wikipedia) or perhaps there is a still a way to do that and helpful?
1. https://en.wikipedia.org/wiki/Color_space#Absolute_color_spa... : However, in general, converting between two non-absolute color spaces (for example, RGB to CMYK) or between absolute and non-absolute color spaces (for example, RGB to Lab*) is almost a meaningless concept.
The conversion between RGB and CIELAB is almost meaningless (according to wikipedia) or perhaps there is a still a way to do that and helpful?
1. https://en.wikipedia.org/wiki/Color_space#Absolute_color_spa... : However, in general, converting between two non-absolute color spaces (for example, RGB to CMYK) or between absolute and non-absolute color spaces (for example, RGB to Lab*) is almost a meaningless concept.