Hi William
I agree that its interesting to compare different images of the same object because there will always be something new and different in each of the images. Re the star colour issue you noted, in processing narrowband images (certainly for Hubble palette colours) star colour has to be adjusted to correct for an over-powering magenta hue which results from combining the 3 narrowband channels. This results in narrowband stars appearing colourless. To remedy this a recent trend has been for narrowband and broadband images to be taken of the same object – narrowband processed as normal and broadband (RGB) channels used solely to give the stars a ‘natural’ broadband colour. I have not tried processing an image using this technique yet, but I have some data I took for the dolphin head nebula to process which has both narrowband and broadband data for this purpose. In theory, having stripped out the stars and processed the nebula in ‘starless mode’ it should be relatively straightforward to add the broadband stars in. However, stars rendered in narrowband usually appear smaller than broadband ones, so some experimentation may be necessary in the combination process.
KR
Tim C
From: croydo...@googlegroups.com <croydo...@googlegroups.com> On Behalf Of William Bottaci
Sent: 14 June 2022 17:20
To: croydo...@googlegroups.com
--
You received this message because you are subscribed to the Google Groups "croydonastro" group.
To unsubscribe from this group and stop receiving emails from it, send an email to croydonastro...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/croydonastro/CAHfnR27-WdOG%2BmGqcp15uGxXF6dy_ZQgt_bbxPGFjzz%3D5saS5A%40mail.gmail.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/croydonastro/2133501d8801b%24d8722060%2489566120%24%40gmail.com.