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I was wondering why I couldn't load my LRGB FITS from Maxim into PS. I have been combining and aligning my separate converted L,R,G and B images as layers manually in PS. Thanks for the info.
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No problem at all!
The reason for this is that there is no formal specification for RGB images (no header keyword exists) in the FITS spec. To interpret 3-plane images as RGB, requires an assumption to be made about the data when it is read. The FITS spec does not provide well for assumptions, aiming at determining the file contents and format as determined by data in the header. Therefore it is not possible to determine if a file contains an RGB image purely from specified keywords.
The ESA Liberator guys were asked about this when Liberator 1 came out and they flattly refused to support it directly, for the reasons above. It is a strict FITS implementation.
One of the benefits of writing your own software, is that it doesn't have to go through a committee
