Quote:
Originally Posted by astronobob
Thats great Rodney,
All over the top of my head; The 3 narrow band mono data's are indeed interesting ?
I like the resulting color too - no bias 'ere 
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A Question tho, I am uneducated in the varieties of capturing narrow-band sets and what is doing for final images, - Can I ask if you added the RGB's to a combined of all 3 Ha/OIII/SII channels; I guess yes, looks like data from all in the color final.
IF so, does you stack the Ha/OIII/SII channels 1st separately and then add the rgb's ?  Or do all rgb's & Ha/OIII/SII channels stack together
Cheers |
Thanks for your comments Bob. To answer your questions, the Ha/OIII/SII masters were first created separately with each channel created from the associated calibrated and stacked subs (see Astrobin post for exposure details). That gave me three linear images as the starting point for processing. The processing then comprised the steps of; creating an enhanced luminance, creating the colour image, combining the colour image with the luminance and enhancing the final image.
The enhanced (monochrome) luminance is a greyscale image created from the addition of the three narrow band channels. The colour image is created by combining the three channels using a channel mix based on the Hubble Pallet (SHO=RGB). The colour image is then combined with the enhanced luminance. I use Pixinsight so I use the LRGB Combination Tool for this. This image is then enhanced by means additional colour saturation and some tweaking of hues using the Curves tool in PI.
Obviously this is snapshot Bob as the detailed processing includes noise management, stretching, colour balancing etc.
