I collect 2 sets of data one for the disc and up the gan to get the proms.
I stack in AS3.
The disc is sharpened in imppg .
Then into PS
Open your best disc and a close in time prom image
I do any cosmetics like clone stamp to remove any dust bunnies, stretching and final sharpening of the disc
Also I usually drop the gamma a using
image—adjustments- exposure
to about 0.85 ish
To the prom image I do a stretch in levels to bring up the proms (if need be ) and drop the black point to get a good background
Back to the surface disc
using the magic wand tool click the background (with a tolerance of between 20 and 50 in my case) this should give the “marching ants” round the edge but crop the proms if any are showing)
select – inverse
select-modiy-smooth (I use 10 but yours will vary)
select- modify-contract (I use 2 to bring the ants just onto the disc)
copy and paste onto the prom disc (ctrl C thenC trl V)
use the move tool on the cropped surface disc to align with the prom image disc
then use
edit –free transform
to resize the surce disc to fit the prom disc (I usually do it at “fit to screen” then zoom in to tidy it up)when happy with that click the “tick” in tool bar just above the image
flatten the layer and crop to tidy the edges and centre you image
save as a mono
image –mode- RGB
I then use a saved curve to colour the image