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Re: filmscanners: Vuescan - A few technical questions
I agree, and I have some new questions:
Is the scan in Vuescan's memory the same as the "raw scan"?
And do any of the settings on the Color Tab or the Media tab affect the scan
in memory and/or the raw scan?
Finally, if you know (or if it's not a trade secret for Ed), what type of
color modification is made by the "Restore Color" option? I scanned a Q-60
without it and the colors were off - Blue was about 10 points too low. With
the Restore Color option checked the result was fairly accurate.
Maris
----- Original Message -----
From: "shAf" <michael@shaffer.net>
To: <filmscanners@halftone.co.uk>
Sent: Sunday, March 04, 2001 11:38 AM
Subject: Re: filmscanners: Vuescan - A few technical questions
| IronWorks writes ...
|
| > I never thought to try it. [long exposure pass] How does it benefit
| the scan?
| >
| > I had assumed that the normal pass would gather sufficient
| information,
| > especially when it passes multiple times picking up missed or bad
| data and
| > then averaging them out.
|
| VS's "long exposure pass" would in effect increase the exposure
| time. Using a camera analogy, think of it as exposing for the shadows
| and increasing the shutter time ... and then later blending this
| exposure with an earlier frame exposed normally (... hence, likely
| registration problems ...).
| Now that I think about it, LEP isn't much different from multiple
| passes, and the evidence seems to bear this out. I scanned an image
| using LEP and 16x MP. After I saw the mis-registration for LEP, I
| scanned again at 16x MP only. I couldn't see where LEP improved over
| 16x MP. After all (Ed may comment), what's the difference between
| increasing the exposure time and scanning mutiple times?? I can
| understand how exposing for shadows improves film response, ... but
| digitally, we are only making numbers larger or averaging smaller
| numbers ... both would seem to produce the same effect for dense areas
| of film(?)
|
| shAf :o)
|
|
