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Re: filmscanners: Filmscanning vs. Flatbedding

On Sat, 19 May 2001 15:13:13 -0700  Douglas Landrum 
(dflandrum@earthlink.net) wrote:

> Tony:
> Could you please expand on how you masked off the image and used layers?
> This part of Photoshop has me confused.
> Doug

1. Start with a saved 16bit image ("A")
2. Adjust saturation and colour balance and levels to give correct 
midtones/shadows, and then reduce to 8 bits and save as "B".
3. Go back to "A" and click on levels on the history list, so you can 
adjust levels differently for the highlights. Disregard the midtones 
and shadows, which will probably be very dark. Reduce to 8bits. You can 
save this as "C".
4. On "C", mask around the highlight areas you want to transfer to your 
composite. There are several ways to do the masking - either use the 
lassoo tool on the bits you want (which was the way I tackled this 
particular image which had a large background area I wanted to work on - 
you don't have to do a pixel-perfect trace around, so long as it's not too 
rough it'll be fine), or selective colour (a good way to deal with lots of 
specular highlights). You *will* need to feather the mask an amount which 
depends on the image and resolution, 20-50pels IME. Do Edit|Copy. 
5. Switch back to "B", the version which you have adjusted for midtone 
values, and Paste - which will create a new layer. Align the new layer 
with the one underneath by dragging it around (easy if the pasted layer 
includes a corner of the frame, not so easy if it's free-form - this wants 
to be pixel perfect. 
6. Flatten the image when happy, and save it. "B" is now your composite 
image. Delete your "C" file if you saved it, it has served its purpose.
7. If necessary go back to stage 3. and go round the loop as many times as 
you wish if there are other areas you wish to change.

If you are on PS6 you can probably figure out a slicker way.


Tony Sleep
http://www.halftone.co.uk - Online portfolio & exhibit; + film scanner 
info & comparisons


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