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Re: filmscanners: About 12 or 16 bits



Thanks, Michael, you assured me than my thoughts, while not correct in a
math sens, are on their own right way to let me understand how things work
and how to get the best profit for my results.

My initial question arised because:

1. After seeing so many times "RGB 48 bits", I had completly forgotten that
my scanner has a 32 bits limit.

2. Only a few days ago I felt the need to tune also in the scanning software
and not only in Photoshop. I was not understanding quite well the
differences between tuning the dynamic range or the white and black points.
Now I am getting much closer.

Mrio Teixeira
mjteixeira@yahoo.com

----- Original Message -----
From: "michael shaffer" <rarewolf@roadrunner.nf.net>
To: <filmscanners@halftone.co.uk>
Sent: Sunday, 28 October, 2001 6:32 AM
Subject: RE: filmscanners: About 12 or 16 bits


| Mrio writes ...
|
| > English is not my native language and sometimes I
| >  have problems with theexact meaning of the words.
|
|   we all should learn to read between the lines  :o)
|
| > Putting the question with an example:
| >
| > step 0 (12 bits) = step 0 (16 bits)
| > step 2000 (12 bits) = step 32000 (16 bits)
| > step 2001 (12 bits) = step 32016 (16 bits)
| > step 4096 (12 bits) = step 65536 (16 bits)
| >
| > Is this correct?
|
|   Essentially.  I couldn't confirm the exact equivelences (my math for
| 2000(12bit) is more like 25198(16bit) ... and of course there is no '4096'
| or '65536', rather 4095 becomes 65535.
|
| shAf  :o)
|


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