Re: Scanner Replies
Re: Scanner Replies
- Subject: Re: Scanner Replies
- From: Eldon <email@hidden>
- Date: Wed, 17 Sep 2008 16:27:49 -0500
On Wed, Sep 17, 2008 at 3:31 PM, Michael Papet <email@hidden> wrote:
> Eldon said, "Is it applying auto exposure to each new scan, or does
> it always set a single exposure? If the former, I don't see how it's
> possible to profile with any degree of certainty."
>
> It's possible to profile with a great deal of precision regardless of exposure functions. This remark will inspire sudden thoughtless replies, but it is a simple point of fact, the sensor gets itself into a calibrated state before a slow scan. Preview, or quick scans rely on stored calibration states. Those are close enough in most instances as what happens after the capture as the image data passes through several processing black boxes before appearing on your monitor.
>
> Michael
I don't wish to reply thoughtlessly, but my knowledge is limited. It
had always been drilled into me that a scanner profile was only good
for the particular exposure the target was scanned at. Should I not
worry too much about it?
My profiling procedure with Vuescan has been to bring up the exposure
on each channel of the Nikon scanner individually so that the
brightest patches on the target don't quite clip, then lock that and
use it for all subsequent scans. Of course if I'm messing with the
channels, the profile will only be good for that ratio, but I could
adjust the global exposure for any scan and still safely use the same
profile?
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden