Quote:
Originally Posted by RickS
G'day Brett,
Uses I have found so far are intensifying colour (as per the video tutorial from Louie that Allan posted above), modifying colour (tweaking that cyan galaxy to make it look more blue, etc.) and a host of applications for operating on lightness or colour independently. A good example of this is incorporating RGB star colours in a narrowband image by merging the a and b channels through a star mask but leaving L unmodified so that the star profiles don't change.
Cheers,
Rick.
|
Good post.
Many people will already know this:
I find when processing that you have to separate the idea of brightness & colour
& always be thinking of one or the other.
LAB mode allows you to do that.
You can wreck an image by turning up the brightness to increase the colour. (with curves)
It is sometimes hard to process without damaging the stars.
Another great idea is to get rid of the stars from nebulas using this trick in a Photoshop tutorial:
http://www.astro-photography.net/Star-Removal.html
Note - if I press delete on PS CS5 it doesn't work as per the tutorial.
I just need to select the stars & click: edit, fill.
The stars magically disappear.
(If some are still there you can use the healing brush tool to get rid of them.)
They can then be copied & pasted back in later from a partially stretched
version that was saved on your HDD.
That way they remain undamaged & still have colour.
cheers
Allan