Re: Alternatives to vuescan

2005-02-26 Thread David Mann
On Feb 26, 2005, at 1:51 PM, Alan Chan wrote:
I am afraid there is a bad news. Vuescan is known to have streaks when 
using Minolta
scanners.
I thought it could calibrate around that sort of thing (much like the 
Minolta software does).

I downloaded the trial version for use with my Multi Pro but the 
trouble is, the trial version doesn't have all of the features - so I 
can't properly evaluate it without actually buying the pro version for 
US$90.

Cheers,
- Dave
http://www.digistar.com/~dmann/


Re: Alternatives to vuescan

2005-02-26 Thread Rob Smith
From: Alan Chan [EMAIL PROTECTED]

 I am afraid there is a bad news. Vuescan is known to have streaks when
using Minolta
 scanners. My Minolte Elite has the same issue as well, particular with the
blue
 channel. What I have found is that the mirror inside the scanner has some
spots
 which the software should take care of, but Vuescan doesn't. The streaks
can be
 fixed with Single Row Marquee Tool in PS but time consuming. Another
software I am
 aware is SilverFast, but I think they support Scan Dual III  IV only.


No streaks with vuescan and my Scan Dual II.  Nor any that I have heard
about from others either.

What is the source of this information?

Rob.



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Re: Alternatives to vuescan

2005-02-26 Thread Alan Chan
--- David Mann [EMAIL PROTECTED] wrote:
 I thought it could calibrate around that sort of thing (much like the 
 Minolta software does).
 
 I downloaded the trial version for use with my Multi Pro but the 
 trouble is, the trial version doesn't have all of the features - so I 
 can't properly evaluate it without actually buying the pro version for 
 US$90.

Vuescan has the calibrate feature, but doesn't nothing to solve the streaking 
issue
with any Minolta scanners. Even the person who invented this sw admit the 
problem
exists, and w/o solution yet. If you search the newsgroup, you will see many 
Minolta
users have experienced the same problem, if not all.

=
Alan Chan
http://www.pbase.com/wlachan



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Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
 SilverFast does a good job too, but I prefer Vuescan's
 algorithms. And Vuescan is cheaper, can handle a ton of
 different scanners if you decide to move to a different scanner
 at some point. I use it to drive both a Minolta SDII and an
 Epson 2450.

I had a look at Silverfast but didn't like the one scanner option although 
ultimately I suppose it could be more accurate, I'd also like to add an old 
Umax Astra 1220S flatbed to the SCSI chain for the odd print scan.

 48bit TIFF (with LZW compression if you want to save space) and
 the maximum optical resolution of the scanner are good (I am not
 sure of the optical resolution of the Scan Dual, I have a Scan
 Dual II and I know that's 2820ppi).

I'm thinking of going without compression then writing everything to DVD+R or 
CDR at some point, although I have yet to select the blank media, Fuji, 
Traxdata? I believe the maximum resolution is 2438 dpi which results in max. 
3504 x 2336 about 8.18 million pixel, not the best but it's free :)

 A couple of tips: 
 - If you batch up your negs/slides into groups with similar
 characteristics, you can then batch scan with one set of
 settings more efficiently (up to strips of 6 negs or 4 slides
 with that scanner, I believe).

Yes I was working on saving profiles for particular film types and loading 
them each time I switched film emulsion, I've yet to figure out if vuescan 
will batch scan unattended (without me manually feeding that is)

 The advantage to scanning and saving RAW files in Vuescan is
 that it will do much like a RAW format in a camera ... dump the
 scanner's raw data out to a file ... which can then be
 reprocessed many times with different rendering settings to get
 a better scan. Much better than re-scanning the originals many
 times, and a lot quicker. Of course, it costs more time and
 space to save RAW files. Whether its worth it to you only you
 can decide. (A lot of my negatives are archived digitally as a
 Vuescan RAW file, a 48bit TIFF-LZW file, and an index page per
 roll of film.)

I really will have to dabble with RAW at some point, I could basically 
produce TIFF and RAW at one go with each negative plus the index page I 
suppose, why are the RAW files given a TIFF file extension is RAW not a 
format in it's own right?

 Scanning is a slow and tedious process, but I like having
 archive copies of my negatives and prints that I can replicate
 losslessly and manage electronically.

It will pass the time at lunch where I work :) but needless to say it will be 
a long job, I just wanted some informed opinion from experienced users such 
as yourself before starting only to find I'd gone down the wrong road :)

Many thanks for the info and tips.

Best regards,

John



Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
Thanks Alan

I've not noticed any streaks yet but I've only scanned around 20 negs, one 
particularly old negative did produce what I presumed was a scratch. If there 
are spots on the mirror I would assume the streaks would be horizontal across 
the scan? If this is the case then I think it was a scratch caused through 
bad darkroomn practice on my behalf.

You're correct in saying the original Scan Dual does not seem to be supported 
in Silverfast which is a shame it would be nice to try an alternative.

Best regards,

John


-- Original Message ---
From: Alan Chan [EMAIL PROTECTED]
To: pentax-discuss@pdml.net
Sent: Fri, 25 Feb 2005 16:51:13 -0800 (PST)
Subject: Re: Alternatives to vuescan

 --- John Whittingham [EMAIL PROTECTED] wrote:
  I'm about to digitally archive my negs and slides from the past 25+ 
years. 
  I've got the use (long term) of a Minolta Dimage Scan Dual and a late 
version 
  of Vuescan, I'm familiar with the interface and I've been experimenting 
with 
  the options available. Currently scanning at 48 bit TIFF, max resolution 
  (8+mp) are there any alternatives available (software wise)? Would I be 
  better scanning RAW? Any advice much appreciated before I start the job :)
 
 I am afraid there is a bad news. Vuescan is known to have streaks 
 when using Minolta scanners. My Minolte Elite has the same issue as 
 well, particular with the blue channel. What I have found is that 
 the mirror inside the scanner has some spots which the software 
 should take care of, but Vuescan doesn't. The streaks can be fixed 
 with Single Row Marquee Tool in PS but time consuming. Another 
 software I am aware is SilverFast, but I think they support Scan 
 Dual III  IV only.
 
 http://www.silverfast.com/pricing/en.html
 http://groups.google.ca/groups?hl=enlr=ie=UTF-
8group=comp.periphs.scanners
 
 =
 Alan Chan
 http://www.pbase.com/wlachan
 
   
   
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--- End of Original Message ---



Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
That's very reassuring to know, thanks Bruce.

John

-- Original Message ---
From: Bruce Dayton [EMAIL PROTECTED]
To: Alan Chan pentax-discuss@pdml.net
Sent: Fri, 25 Feb 2005 20:57:49 -0800
Subject: Re: Alternatives to vuescan

 I've got over 5,000 scans on my Scan Dual II, so my mirror must not
 have the problem.
 
 -- 
 Best regards,
 Bruce
 
 Friday, February 25, 2005, 6:46:10 PM, you wrote:
 
 AC --- Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
  I have been using Vuescan and a Minolta Scan Dual II since Fall
  of 2000, have scanned perhaps 2000 or more negatives with it,
  and have never seen a streak. 
  Where did you hear of this? And how would the scanning software
  know how to compensate for what sounds like a defect in your
  scanner hardware?
 
 AC I first noticed this problem when one of my 8x12 print had a 
 long yellow line. Then AC I searched (streaking + minolta) for 
 answer on AC comp.periphs.scanners and found it AC was a Minolta 
 issue with Vuescan. Since Minolta software doesn't have such issue,
  AC and Vuescan doesn't use Minolta SDK like SilverFast does, quite 
 possible Minolta use AC the software to mask the hardware flaw on 
 the mirror. I have switched the mirror AC upside down and ran some 
 tests. My conclusion is that the mirror is the source of AC 
 problem. Since not all scanners have spots on the mirrors, some 
 Minolta scanners AC might be perfectly fine with Vuescan, while 
 some don't.
 
 AC http://groups.google.ca/groups?hl=enlr=ie=UTF-
8group=comp.periphs.scanners
 
 AC =
 AC Alan Chan
 AC http://www.pbase.com/wlachan
 
   
 AC __ 
 AC Do you Yahoo!? 
 AC Take Yahoo! Mail with you! Get it on your mobile phone. 
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Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
 I suspect something else could be the problem. When I first got
 the Scan Dual II, I ran the MInolta software. I wasn't satisfied
 with it, it both tended to crash frequently and my scans weren't
 particularly sharp.

I'm finding the results with Vuescan much better than the supplied software 
with much better facilities for fine adjustment, colour rendering appears to 
be significantly better also.

John




Re: Alternatives to vuescan

2005-02-26 Thread Alan Chan
--- John Whittingham [EMAIL PROTECTED] wrote:
 If there are spots on the mirror I would assume the streaks would be 
 horizontal
across   the scan?

Yes, and it can be fixed with the Single Row Marquee Tool in Photoshop, before 
the
image was rotated in anyway.

=
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http://www.pbase.com/wlachan



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Re: Alternatives to vuescan

2005-02-26 Thread Alan Chan
--- John Whittingham [EMAIL PROTECTED] wrote:
 I'm finding the results with Vuescan much better than the supplied software 
 with much better facilities for fine adjustment, colour rendering appears to 
 be significantly better also.

Indeed, especially for colour negatives.

=
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http://www.pbase.com/wlachan



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Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
Thanks Alan, I'll be keeping an eye open for any streaking.

John


-- Original Message ---
From: Alan Chan [EMAIL PROTECTED]
To: pentax-discuss@pdml.net
Sent: Sat, 26 Feb 2005 04:30:22 -0800 (PST)
Subject: Re: Alternatives to vuescan

 --- John Whittingham [EMAIL PROTECTED] wrote:
  If there are spots on the mirror I would assume the streaks would be 
horizontal
 across   the scan?
 
 Yes, and it can be fixed with the Single Row Marquee Tool in 
 Photoshop, before the image was rotated in anyway.
 
 =
 Alan Chan
 http://www.pbase.com/wlachan
 
   
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Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
 Indeed, especially for colour negatives.

I've not got to slides yet, I guess that will be the real test, greater 
dynamic range required from the hardware.

John






Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
 I am afraid there is a bad news. Vuescan is known to have streaks 
 when using Minolta scanners. 

Did you experiment with the infrared cleaning filter?

John




Re: Alternatives to vuescan

2005-02-26 Thread Godfrey DiGiorgi

--- John Whittingham [EMAIL PROTECTED] wrote:
  I believe the maximum resolution is 2438 dpi which results in
max. 
 3504 x 2336 about 8.18 million pixel, not the best but it's
free :)

Hmm. My calculator spreadsheet says that a 24x35mm frame scanned
at 2438ppi nets an image 2304x3455 pixels in size, or 7.6
Mpixel. Something's off by a little bit somewhere... ;-)

 I really will have to dabble with RAW at some point, I could
basically 
 produce TIFF and RAW at one go with each negative plus the
index page I 
 suppose, why are the RAW files given a TIFF file extension is
RAW not a 
 format in it's own right?

RAW is really the name of a format type, a RAW file means a
different thing for every device that can create it. Viewscan
simply encode the metadata and sensor data into a very simple
TIFF format. If you analyze a Pentax .PEF file, it also is
essentially a TIFF file with embedded metadata, a couple of JPEG
low rez renders, and the sensor data in a tagged structure. 

Godfrey



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Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
 Hmm. My calculator spreadsheet says that a 24x35mm frame scanned
 at 2438ppi nets an image 2304x3455 pixels in size, or 7.6
 Mpixel. Something's off by a little bit somewhere... ;-)

Never calculated it just reading from the manual, shouldn't that be 24mm x 
36mm ?

 RAW is really the name of a format type, a RAW file means a
 different thing for every device that can create it. Viewscan
 simply encode the metadata and sensor data into a very simple
 TIFF format. If you analyze a Pentax .PEF file, it also is
 essentially a TIFF file with embedded metadata, a couple of JPEG
 low rez renders, and the sensor data in a tagged structure.

Right, so a raw file might have any file extension (propriety) depending on 
the device that created it. When looking at the files yesterday at work it 
was just (obviously) an exact scan of the negative (when viewed with 
Photoshop CS) no rotation or anything. I tried inverting to give me a 
positive and that gave me an image that would require a lot of editing, I'm 
missing something...yes?

John





Re: Alternatives to vuescan

2005-02-26 Thread Godfrey DiGiorgi
--- John Whittingham [EMAIL PROTECTED] wrote:
  Hmm. My calculator spreadsheet says that a 24x35mm frame
scanned
  at 2438ppi nets an image 2304x3455 pixels in size, or 7.6
  Mpixel. Something's off by a little bit somewhere... ;-)
 
 Never calculated it just reading from the manual, shouldn't
 that be 24mm x 36mm ?

Typo on my part, the spreadsheet is correct. If you got the
numbers from the scanner specification sheet, that's more
accurate as the scanner's maximum scannable area is likely not
exactly 24x36mm. 

  RAW is really the name of a format type, a RAW file means
a
  different thing for every device that can create it. Vuescan
  simply encode the metadata and sensor data into a very
simple
  TIFF format. If you analyze a Pentax .PEF file, it also is
  essentially a TIFF file with embedded metadata, a couple of
JPEG
  low rez renders, and the sensor data in a tagged structure.
 
 Right, so a raw file might have any file extension (propriety)
 depending on  the device that created it. When looking at the
files
 yesterday at work it  was just (obviously) an exact scan of
the negative (when
 viewed with  Photoshop CS) no rotation or anything. I tried
inverting to
 give me a  positive and that gave me an image that would
require a lot of
 editing, I'm  missing something...yes?

Vuescan's RAW has minimal metadata (he generates the processing
parameters by analyzing the scan data on the fly) and the sensor
data is basically just a row x column matrix of RGB pixel data
with linear gamma, that's typically what scanners produce as
straight output. Processing RAW output from BW negative scans
means doing the inversion required and then adding the gamma
curve conversion to what our eyes like to see... relatively
simple to do. Processing RAW output from color positives is
somewhat trickier as color positives have a higher gamma than
negatives to begin with. 

Processing color negatives to RGB positives ... well, you have
to invert it, remove the crossover mask per the particular
film's profile, then gamma correct it. I'll let Vuescan do that
for me. ;-)

Godfrey



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Re: Alternatives to vuescan

2005-02-26 Thread John Whittingham
 Processing color negatives to RGB positives ... well, you have
 to invert it, remove the crossover mask per the particular
 film's profile, then gamma correct it. I'll let Vuescan do that
 for me. ;-)

Yes me too, I'm more than pleased with the 48 bit TIFFs I'm getting, just a 
little more fine tuning and I'm away :) I'll save the RAW flies as well for 
possible future use, storage really isn't a problem these days.

Best regards,

John




Re: Alternatives to vuescan

2005-02-26 Thread Alan Chan
--- John Whittingham [EMAIL PROTECTED] wrote:
 I've not got to slides yet, I guess that will be the real test, greater 
 dynamic range required from the hardware.

I have found the Minolta software produces better results for slides than 
Vuescan,
while Vuescan does a lot better for negatives (colour or BW). But I have never 
got
any IT8 to calibrate the Vuescan so maybe I am missing something. However, for 
my
scanner (oldest Elite), if the slides look a little dark, the scans will be too 
dark
and useless. That's one reason I am not too keen on shooting slides. Perhaps the
latest scanners (Nikon 5000  Minolta 5400) will do better? Too bad Vuescan 
doesn't
solve the streaking issue or I will buy the 5400.

=
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Re: Alternatives to vuescan

2005-02-26 Thread Alan Chan
--- John Whittingham [EMAIL PROTECTED] wrote:
 Did you experiment with the infrared cleaning filter?

If you mean ICE, then yes. The scratch removal feature of Vuescan has no impact 
to
the streaking problem.

=
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http://www.pbase.com/wlachan



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Re: Alternatives to vuescan

2005-02-25 Thread Godfrey DiGiorgi
--- John Whittingham [EMAIL PROTECTED] wrote:
 I'm about to digitally archive my negs and slides from the
past 25+ years. 
 I've got the use (long term) of a Minolta Dimage Scan Dual and
a late version 
 of Vuescan, I'm familiar with the interface and I've been
experimenting with 
 the options available. Currently scanning at 48 bit TIFF, max
resolution 
 (8+mp) are there any alternatives available (software wise)?
Would I be 
 better scanning RAW? Any advice much appreciated before I
 start the job :)

SilverFast does a good job too, but I prefer Vuescan's
algorithms. And Vuescan is cheaper, can handle a ton of
different scanners if you decide to move to a different scanner
at some point. I use it to drive both a Minolta SDII and an
Epson 2450.

48bit TIFF (with LZW compression if you want to save space) and
the maximum optical resolution of the scanner are good (I am not
sure of the optical resolution of the Scan Dual, I have a Scan
Dual II and I know that's 2820ppi). 

Practice with a few scans first to get a feel for using the
controls on the Color tab to adjust white point, black point and
brightness, get into the ballpark. Remember that the goal of
scanning negatives or slides is to obtain as much GOOD data as
possible in order to enables image processing afterwards. I
never expect a scan to be perfect, it's just getting me the data
I need to then edit and finish with Photoshop. 

A couple of tips: 
- If you batch up your negs/slides into groups with similar
characteristics, you can then batch scan with one set of
settings more efficiently (up to strips of 6 negs or 4 slides
with that scanner, I believe). 

- If you want, you can tell Vuescan to save an index file along
with the scans. This will generate a horribly big .BMP file with
thumbnails in it, but you can open that with Photoshop and make
it into a JPEG. The index pages can be printed and used as a
proof sheet to help with filing the physical negatives. 

The advantage to scanning and saving RAW files in Vuescan is
that it will do much like a RAW format in a camera ... dump the
scanner's raw data out to a file ... which can then be
reprocessed many times with different rendering settings to get
a better scan. Much better than re-scanning the originals many
times, and a lot quicker. Of course, it costs more time and
space to save RAW files. Whether its worth it to you only you
can decide. (A lot of my negatives are archived digitally as a
Vuescan RAW file, a 48bit TIFF-LZW file, and an index page per
roll of film.) 

Scanning is a slow and tedious process, but I like having
archive copies of my negatives and prints that I can replicate
losslessly and manage electronically. 



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Re: Alternatives to vuescan

2005-02-25 Thread Alan Chan
--- John Whittingham [EMAIL PROTECTED] wrote:
 I'm about to digitally archive my negs and slides from the past 25+ years. 
 I've got the use (long term) of a Minolta Dimage Scan Dual and a late version 
 of Vuescan, I'm familiar with the interface and I've been experimenting with 
 the options available. Currently scanning at 48 bit TIFF, max resolution 
 (8+mp) are there any alternatives available (software wise)? Would I be 
 better scanning RAW? Any advice much appreciated before I start the job :)

I am afraid there is a bad news. Vuescan is known to have streaks when using 
Minolta
scanners. My Minolte Elite has the same issue as well, particular with the blue
channel. What I have found is that the mirror inside the scanner has some spots
which the software should take care of, but Vuescan doesn't. The streaks can be
fixed with Single Row Marquee Tool in PS but time consuming. Another software I 
am
aware is SilverFast, but I think they support Scan Dual III  IV only.

http://www.silverfast.com/pricing/en.html
http://groups.google.ca/groups?hl=enlr=ie=UTF-8group=comp.periphs.scanners

=
Alan Chan
http://www.pbase.com/wlachan




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Re: Alternatives to vuescan

2005-02-25 Thread Godfrey DiGiorgi
Alan, 

I have been using Vuescan and a Minolta Scan Dual II since Fall
of 2000, have scanned perhaps 2000 or more negatives with it,
and have never seen a streak. 

Where did you hear of this? And how would the scanning software
know how to compensate for what sounds like a defect in your
scanner hardware?

Godfrey


--- Alan Chan [EMAIL PROTECTED] wrote:
 I am afraid there is a bad news. Vuescan is known to have
 streaks when using Minolta
 scanners. My Minolte Elite has the same issue as well,
 particular with the blue
 channel. What I have found is that the mirror inside the
 scanner has some spots
 which the software should take care of, but Vuescan doesn't.
 The streaks can be
 fixed with Single Row Marquee Tool in PS but time consuming.
 Another software I am
 aware is SilverFast, but I think they support Scan Dual III 
 IV only.
 
 http://www.silverfast.com/pricing/en.html

http://groups.google.ca/groups?hl=enlr=ie=UTF-8group=comp.periphs.scanners
 
 =
 Alan Chan
 http://www.pbase.com/wlachan




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Re: Alternatives to vuescan

2005-02-25 Thread Alan Chan
--- Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
 I have been using Vuescan and a Minolta Scan Dual II since Fall
 of 2000, have scanned perhaps 2000 or more negatives with it,
 and have never seen a streak. 
 Where did you hear of this? And how would the scanning software
 know how to compensate for what sounds like a defect in your
 scanner hardware?

I first noticed this problem when one of my 8x12 print had a long yellow line. 
Then
I searched (streaking + minolta) for answer on comp.periphs.scanners and found 
it
was a Minolta issue with Vuescan. Since Minolta software doesn't have such 
issue,
and Vuescan doesn't use Minolta SDK like SilverFast does, quite possible 
Minolta use
the software to mask the hardware flaw on the mirror. I have switched the mirror
upside down and ran some tests. My conclusion is that the mirror is the source 
of
problem. Since not all scanners have spots on the mirrors, some Minolta scanners
might be perfectly fine with Vuescan, while some don't.

http://groups.google.ca/groups?hl=enlr=ie=UTF-8group=comp.periphs.scanners

=
Alan Chan
http://www.pbase.com/wlachan



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Re: Alternatives to vuescan

2005-02-25 Thread Bruce Dayton
I've got over 5,000 scans on my Scan Dual II, so my mirror must not
have the problem.

-- 
Best regards,
Bruce


Friday, February 25, 2005, 6:46:10 PM, you wrote:

AC --- Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
 I have been using Vuescan and a Minolta Scan Dual II since Fall
 of 2000, have scanned perhaps 2000 or more negatives with it,
 and have never seen a streak. 
 Where did you hear of this? And how would the scanning software
 know how to compensate for what sounds like a defect in your
 scanner hardware?

AC I first noticed this problem when one of my 8x12 print had a long yellow 
line. Then
AC I searched (streaking + minolta) for answer on
AC comp.periphs.scanners and found it
AC was a Minolta issue with Vuescan. Since Minolta software doesn't have such 
issue,
AC and Vuescan doesn't use Minolta SDK like SilverFast does, quite possible 
Minolta use
AC the software to mask the hardware flaw on the mirror. I have switched the 
mirror
AC upside down and ran some tests. My conclusion is that the mirror is the 
source of
AC problem. Since not all scanners have spots on the mirrors, some Minolta 
scanners
AC might be perfectly fine with Vuescan, while some don't.

AC 
http://groups.google.ca/groups?hl=enlr=ie=UTF-8group=comp.periphs.scanners

AC =
AC Alan Chan
AC http://www.pbase.com/wlachan



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Re: Alternatives to vuescan

2005-02-25 Thread Godfrey DiGiorgi
Hmm. Interesting. 

I suspect something else could be the problem. When I first got
the Scan Dual II, I ran the MInolta software. I wasn't satisfied
with it, it both tended to crash frequently and my scans weren't
particularly sharp. That's what motivated me to try Vuescan ...
Vuescan's focusing algorithm is far superior to Minolta's, at
least for the Scan Dual II: my scan's became razor sharp, and
Vuescan never crashed on me. 

If the streak is a very thin, 1pixel line, it's possible that
the Minolta software simply doesn't resolve it. 

Of course, the Minolta Elite is a different scanner from the
Scan Dual and Scan Dual II, with different hardware in it. I
don't believe there's a mirror in the SD models at all (could be
wrong). I have had excellent results with the SDII and Vuescan,
it has never let me down. 

I don't do much scanning anymore, but I keep up to date with
Vuescan releases and it's all I use. 

Godfrey

--- Alan Chan [EMAIL PROTECTED] wrote:

 I first noticed this problem when one of my 8x12 print had a
 long yellow line. Then
 I searched (streaking + minolta) for answer on
 comp.periphs.scanners and found it
 was a Minolta issue with Vuescan. Since Minolta software
 doesn't have such issue,
 and Vuescan doesn't use Minolta SDK like SilverFast does,
 quite possible Minolta use
 the software to mask the hardware flaw on the mirror. I have
 switched the mirror
 upside down and ran some tests. My conclusion is that the
 mirror is the source of
 problem. Since not all scanners have spots on the mirrors,
 some Minolta scanners
 might be perfectly fine with Vuescan, while some don't.
 

http://groups.google.ca/groups?hl=enlr=ie=UTF-8group=comp.periphs.scanners




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