Why no multisampling during a preview in Vuescan?

[OlegK]

After playing a couple of years with Vuescan (and Scan Elite 2), I
found that the only workflow with acceptable productivity is to use
scan-from-preview.
I put a 6-frame strip in the holder, "preview" all the frames on max
resolution (unattended, takes 15 min), then one-by-one adjust
cropping/colors and save.
I would be glad to be able of using multisampling, but it only works
during the "final scan" that I won't like to employ.
The reasons for omitting "final scan":
1) Color mismatch between the preview and the "final scan".
2) "Final scan" requires more manned operation and thus is waste of
time:
- flow 1: preview_all(unattended, 15min) + 6 *
{->adjust(attended)->save(attended, 45sec)};
- flow 2: 6 * {preview(attended?)->adjust(attended)->scan(unattended?,
3min)};
- flow 3: preview_all(unattended) + 6 *
{->adjust(attended)->scan(unattended?, 3min)}

Regards,
Oleg.

 

[Erik Krause]

Hello, OlegK
you wrote...

After playing a couple of years with Vuescan (and Scan Elite 2), I
found that the only workflow with acceptable productivity is to use
scan-from-preview.
I put a 6-frame strip in the holder, "preview" all the frames on max
resolution (unattended, takes 15 min), then one-by-one adjust
cropping/colors and save.
I would be glad to be able of using multisampling, but it only works
during the "final scan" that I won't like to employ.

What if you scan raw to disk and use scan from disk? Scanning raw to
disk does multisampling and can run completely unattended. Scanning or
previewing from disk should be way faster than from scanner.

Anyway I can't understand your problem with different colors for
preview and scan. Lock exposure (if you don't scan from disk), lock
film base color (for negatives or slide) and lock image color before
you do final scan should solve your problem.