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[filmscanners] RE: Bands while using Vuescan


  • To: lexa@www.lexa.ru
  • Subject: [filmscanners] RE: Bands while using Vuescan
  • From: "Nagaraj, Ramesh" <Ramesh.Nagaraj@ca.com>
  • Date: Fri, 9 Aug 2002 18:29:47 -0400
  • Content-class: urn:content-classes:message
  • Thread-index: AcI/8I1BnzJ3xqRwStKLPOzR680GbAAAxobA
  • Thread-topic: [filmscanners] Re: Bands while using Vuescan
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I too was wandering what is this "Linear scan" is. 
Its good idea to scan with minolta s/w and process with vuescan. 
I get the control and also I will get to know whether Vuscan's post-scan 
processing is causing bands.
I will try.

Thanks
Ramesh


-----Original Message-----
From: [mailto:al@greenspace.freeserve.co.uk]
Sent: Friday, August 09, 2002 5:35 PM
To: Nagaraj, Ramesh
Subject: [filmscanners] Re: Bands while using Vuescan


> Earlier I was reluctant to explore minolta s/w
> and had always ignored it. But now I am forced use Minolta s/w, It has 
>options to select
> Color space, Monitor device RGB, these option are hidden!!!. Another thing is 
>minolta s/w
> will not embedd the color profile into image.

Have you tried doing a 16 bit raw (linear) scan to file from the Minolta 
software with
autoexposure turned off and then processing the file in Vuescan?  This isn't 
much slower
(although it is best not to have both open at the same time as this can cause 
the scanner
to hang!) and would give the degree of control you are after.


Al Bond


>
> (ANOTHER ISSUE)
> Another problem which I faced few times was, that I used to get full RED 
>images(no other
> thing except RED). During the scanning process, Vuescan shows Pre-processed 
>image and
> post-processed image in the s/w. Pre-processed image used to look fine but 
>final file
> written to harddisk used to be washed with RED. Seems there is some thing 
>wrong in the
> preprocessing.
>
> Thanks
> Ramesh
>
> -----Original Message-----
> From: al@greenspace.freeserve.co.uk
> [mailto:al@greenspace.freeserve.co.uk]
> Sent: Sunday, August 04, 2002 6:22 PM
> To: Nagaraj, Ramesh
> Subject: [filmscanners] Re: Bands while using Vuescan
>
>
> When I tested the Elite II I tried it on my PC (PII 350 with 896 Mb of RAM 
>running
> Windows 98) and on a borrowed laptop (PIII 600 with 128Mb RAM running Windows 
>2000) and
> the results using the Minolta software (version 1.0.0 I think) scanned at the 
>full
> resolution of 2820 dpi with ICE switched off were identical.
>
> I wonder whether we are discussing the same sort of banding in the red 
>channel.  I posted
> a couple of examples, comparing the results with the earlier version of the 
>scanner:
>
> http://mysite.freeserve.com/filmscanners/elite_vs_eliteII.jpg
> (Crop of full frame for reference and full resolution extract from each 
>scanner - 470KB)
>
> http://mysite.freeserve.com/filmscanners/elite_vs_eliteII_channels.jpg
> (Separate channels of full resolution extract from each scanner - 307KB)
>
> If this is the sort of banding you are seeing in Vuescan, then I think you 
>may be right
> that Minolta have partly fixed the problem in the software.  What version of 
>the Minolta
> software are you using?
>
>
>
> Al Bond
>
>
>
> > This link has some comments with reference to " Vuescan & Minolta h/w & 
>Bands...."
> > The writer says its due to speed & virtual memory.
> >
> > http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=000kAv  (Look for last 
>comment)
> >
> >
> > Ramesh
> >
> > -----Original Message-----
> > From: al@greenspace.freeserve.co.uk
> > [mailto:al@greenspace.freeserve.co.uk]
> > Sent: Thursday, August 01, 2002 6:48 PM
> > To: Nagaraj, Ramesh
> > Subject: [filmscanners] Re: Bands while using Vuescan
> >
> >
> > Ramesh wrote:
> >
> > >  I have heard lot of people saying "Minolta Dimage Elite II" causes 
>bands. I too
> > >  observed the follwing.
> > >
> > > a) Causes clear red bands in DARK part of the slide scan.
> >
> > I tried 2 Elites IIs in January/February and both units exhibited this.
> >
> > >   * While using Vuescan. But ****NOT*** in Minolta software.
> >
> > <snip>
> >
> > > *Is it the problem with Vuescan or Minolta h/w. H/W seems to be ok, 
>beacuse bands
> > appear
> > > only with DICE. Without DICE there are no bands.
> >
> >
> > Odd.  I found it happened both with Vuescan AND the Minolta software with 
>or without ICE
> > turned on so my conclusion was that it was the hardware!  The only way I 
>found to the
> > stop the banding with the Minolta software was to switch GEM on.  Of 
>course, this didn't
> > actually stop the banding but the smoothing effect of GEM masked it.  (If I 
>slowly
> > increased the GEM value from the lowest value of 1, the visibility of the 
>banding
> > decreased correspondingly.)
> >
> > Was GEM definitely switched off when the you got band-free scans?
> >
> >
> >
> > Al Bond
> >
> >
> > 
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> >
>
>
>
> 
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