I purposely oversharpen (USM) my moth dissection images to show better detail. Doing so in RGB mode often changes colours giving weird effects, as sharpening affects both edges and colours.
Temporarily converting an RGB image to LAB and selecting the L channel before USM results in sharpening only edges, colours not affected as they are in the a and b channels.
Does seem to give a 'better' final image.
the above is my interpretation of what I have read; just as likely to be incorrect as correct.
LAB color mode
Moderators: rjlittlefield, ChrisR, Chris S., Pau
LAB color mode
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.
Nikon camera, lenses and objectives
Olympus microscope and objectives
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.
Nikon camera, lenses and objectives
Olympus microscope and objectives
- iconoclastica
- Posts: 486
- Joined: Sat Jun 25, 2016 12:34 pm
- Location: Wageningen, Gelderland
In lab, tone (brightness) is decoupled from hue, contrary to rgb, where you 'add more colour' to increase the lightness. For this reason sharpening on the l-channel in lab often gives better results than sharpening in rgb. Also colour corrections tend to be more precise. Find more about this in Dan Margulis' book.
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