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Peter, et al,
As you probably know I only do spectroscopy after many years of visual and astrophotography.
There's no such thing a true colour in the images we record.
The spectrum of the various objects at least comes somewhere towards a detailed distribution of the light received. There are issues of interfering dust clouds, Doppler shift etc.
I can correct for the camera response and sometimes, if data is available, the dust absorption. I could, based on the scientific data I have on the response of the normal human eye ("Researches in colour vision", Sir W Abney.) make the necessary corrections across the spectum to give a "visual colour representation"
I honestly don't think the effort would be worth it.
Ken
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