Vuescan: problems with "clean" of large files

[Michael Schebaum]

Hello,

I have to scan very large slides (6x17 cm). The file size is approx. 500 MB
at 2400 dpi and 800 MB at 3200 dpi.
At the 3200 dpi the "clean" function of Vuescan doesn't work: the program
stops at this point after scanning. Same problem with higher resolution
(4000 dpi).
Seems Vuescan has problems with files > 500 MB? Or am I doing something
wrong?

Michael

 

[Neil Gould]

Hello,

I have to scan very large slides (6x17 cm). The file size is approx.
500 MB at 2400 dpi and 800 MB at 3200 dpi.
At the 3200 dpi the "clean" function of Vuescan doesn't work: the
program stops at this point after scanning. Same problem with higher
resolution (4000 dpi).
Seems Vuescan has problems with files > 500 MB? Or am I doing
something wrong?

How are your system resources? How much RAM and scratch disc space do you
have?

Neil

 

[Michael Schebaum]

How are your system resources? How much RAM and scratch disc space do you
have?

I have an Athlon 2300 MHz, 1 GB RAM and 95 GB free disk space.
With the original Epson scan software such a large file is no problem (but
this sw needs 1 hour for an image, vuescan needs 15 minutes).

Michael

 

[Noons]

Michael Schebaum apparently said,on my timestamp of 23/09/2005 10:07 PM:

I have an Athlon 2300 MHz, 1 GB RAM and 95 GB free disk space.
With the original Epson scan software such a large file is no problem (but
this sw needs 1 hour for an image, vuescan needs 15 minutes).

Did you increase the memory for Vuescan in prefs?
800Mb scan with 1Gb RAM might be a bit of a stretch, particularly if you
are using Windows...

 

[Neil Gould]

Michael Schebaum apparently said,on my timestamp of 23/09/2005 10:07
PM:


Did you increase the memory for Vuescan in prefs?
800Mb scan with 1Gb RAM might be a bit of a stretch, particularly if
you are using Windows...

That really shouldn't be a problem with any version of Windows newer than
3.0. Unlike pre-OS-X Macs, VM has always worked reasonably well. ;-)

Neil

 

[Neil Gould]

Recently, Michael Schebaum <[email protected]> posted:
[...]

Seems Vuescan has problems with files > 500 MB? Or am I doing
something wrong?

How are your system resources? How much RAM and scratch disc space
do you have?

I have an Athlon 2300 MHz, 1 GB RAM and 95 GB free disk space.
With the original Epson scan software such a large file is no problem
(but this sw needs 1 hour for an image, vuescan needs 15 minutes).

It appears that you should have sufficient resources to handle these
files. Have you checked your file fragmentation lately? When working with
largish files, it doesn't take long to badly fragment a disc, and this can
cause the kind of problems that you're seeing.

You also don't say whether your free disc space is on a separate drive, or
the same volume as your system and other files. It's a good idea to keep
your scratch disc isolated from your other files, especially for large
files.

Regards,

Neil

 

[Noons]

Neil Gould apparently said,on my timestamp of 24/09/2005 12:08 AM:

That really shouldn't be a problem with any version of Windows newer than
3.0. Unlike pre-OS-X Macs, VM has always worked reasonably well. ;-)

It is a problem with my XP Pro, if I don't enable more memory
on the prefs of Vuescan. Mind you: I get 300Mb scans on my
512Mb system quite easily, so may be it is indeed a 512Mb
boundary problem?

 

[Winfried]

Hello,

I have to scan very large slides (6x17 cm). The file size is approx. 500 MB
at 2400 dpi and 800 MB at 3200 dpi.
At the 3200 dpi the "clean" function of Vuescan doesn't work: the program
stops at this point after scanning. Same problem with higher resolution
(4000 dpi).
Seems Vuescan has problems with files > 500 MB? Or am I doing something
wrong?

Michael

Just keep in mind, how VueScan is designed. VueScan keeps the raw-data
in memory (500 MB) to let you produce scans with different setting
without the need to rescan.
If you use infrared clean, the infrared chanel needs about 180 MB
additional memory. Then VueScan needs memory for the computational work
and the OS bufferspace to write the data to a file.
Increasing the memory values in the VueScan settings may help. But the
OS will start swaping/paging and the performance will decrease. For
this type of files you definitely need more memory.

Winfried