vuescan and canon 9900f - infrared cleaning not working

[Kaarel]

Hello

Can anyone confirm this problem with vuescan, canon 9900f and infrared
cleaning not working? It is still present in vuescan v 8.1.14.
Following is my letter to Hamrick and this newsgroup from way back in
october.

---

I was trying out new 8.1.5 with support for canon 9900f and found a
strange problem: infrared repair is misaligned when scanning
negatives.
Tried it on 2 pc's (Win XP SP2), with both old and newest canon
drivers, same
problem. IR cleaning in canon scangear worked ok in both cases, so it
is not a hardware problem.

Misalignement seems not to be uniform across all platen, it seems that
it is accurate in center of scan area and gets progressively worse
when
approaching edge, up to 0.4 mm, in opposite directions on opposite
edges.

I have attached three images to illustrate: scan result from vuescan
and
scangear (medium ir clean for both) and a screenshot from vuescan
showing the misalignement. I have intentionally laid 2 hairs on the
negative for easy view of problem, additionally to few natural
impurities there. Images are from slot 22 on 35mm film adapter.

http://www.hot.ee/ilm/vue_mediumfix.jpg
http://www.hot.ee/ilm/canon_mediumfix.jpg
http://www.hot.ee/ilm/vue_scanview.jpg

I guess it is the problem with working thru canon drivers, contrary to
traditional direct connection. Any hope of reverse engineering the
protocol yet? I was really hoping to purchase it for working in
linux,
but I really appreciate that you have made it work at all, canon
software is completely braindead

with best regards, Kaarel

 

[Roy G. Biv]

(e-mail address removed) (Kaarel) wrote in @posting.google.com:

Hello

Can anyone confirm this problem with vuescan, canon 9900f and infrared
cleaning not working? It is still present in vuescan v 8.1.14.

I can't get the IR clean to work properly regardless of whether I use
Vuescan or the Canon software! Perhaps a month ago I enquired from
Silvervast if their product would be upgraded to enable IR cleaning. They
replied perhaps early next year.

 

[seraphsf]

(e-mail address removed) (Kaarel) wrote in @posting.google.com:




I can't get the IR clean to work properly regardless of whether I use
Vuescan or the Canon software! Perhaps a month ago I enquired from
Silvervast if their product would be upgraded to enable IR cleaning. They
replied perhaps early next year.

IR cleaning works when I use Canoscan on a Canon 8400F but it hasn't
worked for me yet using Vuescan. Ed and I have been corresponding via
email to try to resolve this issue so I hope we find a solution soon.