Re: Scanner Exposure Control
Re: Scanner Exposure Control
- Subject: Re: Scanner Exposure Control
- From: "eugene appert" <email@hidden>
- Date: Thu, 2 Nov 2006 17:27:16 -0500
Hi.
Im not sure if this is related. I wrote in a
couple of months ago with a similar problem, maybe even the same problem. I
noticed that all our transparency Epson scanners including the 4990 scanned
the IT8 white patch at roughly RGB 190. We are using Silverfast to manage
to scan. The scanner profiles were made with Monaco Proof
which married the expected target response ( L*88) to that control signal. However if perceptive rendering is used
for the conversion from the input profile to the RGB workspace, all file data at
RGB 190 or higher is bleached to L*100.
The problem remains
unexplained but we obviously avoid perceptive rendering and manually adjust the
file after scanning. We have been wating for a licence to make input profiles
using Eye One which has been on back order for many months, when, if,
Gretag-Macbeth get organized and we get our licence, Ill be able to tell
if its the profile maker or the scanner.
Eugene Appert
Montreal,
Canada
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