That's what I was thinking of also, as the Help file implies that the dust
removal process will "reduce film grain" and "reduce more film grain". I
was also referring a previous post by Ed, to wit:
"When there's no infrared channel, VueScan 6.6 does a nice job
reducing film grain, but the Scrub and Scour settings soften the
image a bit when trying to remove dust spots.
Regards,
Ed Hamrick"
If grain removal is in fact a separable feature, I too would like it to be a
separately selectable option.
Maris
----- Original Message -----
From: "Bob Shomler" <bob@shomler.com>
To: <filmscanners@halftone.co.uk>
Sent: Wednesday, March 14, 2001 3:47 PM
Subject: filmscanners: Vuescan grain dust removal function (was: Need
feedback on VueScan Improvements)
| >> I had understood that grain removal was a by-product of the ICE-type
| >> cleaning and therefore could not be separated. ...
| >
| >Not sure about VueScan, but ASF's GEM and ROC do not depend on ICE. Two
| >separate sources for this statement: 1) Minolta's medium format scanner
has
| >GEM and ROC but not ICE and 2) the patent that appears to be the basis
for
| >ROC (#5,673,336). The patent states that an IR channel is not necessary
for
| >the removal of color crosstalk but that the process of removing crosstalk
| >improves the IR detection of defects.
|
| From what is written in the help file it would appear that vuescan does
not depend on an IR channel. The following is from the vuescan 7.0 help
file:
|
| --------------
| Clean Use this option to remove dust spots and reduce visible film
grain.
|
| If the scan has an infrared channel, the Light option will remove dust
spots, the Medium option will remove dust spots and reduce film grain, and
the Heavy option will remove dust spots and reduce more film grain.
|
| If the scan doesn't have an infrared channel, the Light option will reduce
film grain, the Medium option will remove more film grain and some smaller
dust spots, and the Heavy option will remove more film grain and larger dust
spots.
| --------------
|
| --
| Bob Shomler
|
