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[OM] Scanner speed - was Vuescan, an HP S20, and me

Subject: [OM] Scanner speed - was Vuescan, an HP S20, and me
From: Moose <olymoose@xxxxxxxxxxxxx>
Date: Wed, 01 Jan 2003 22:28:23 -0800
Just timed a couple of scans. Canoscan FS2710, SCSI, Vuescan, auto-exposure and focus off. Scan - 18sec. Process - 8 sec. Write 25mb compressed Tiff - 12 sec. Total - 38sec. I can't separate out the steps with the Canon software, but the total time is almost exactly the same, although it doesn't do Tiff, so I end up with a 30Mb bitmap. So in my case, Vuescan is the same speed, but offers far more options and control, including specific mask filtering for different films. Without delving deep, I see no obvious quality difference in the output. I used a well exposed, non challenging slide, so I didn't expect any differences..

Computer makes a huge difference. These times are with a 2.8Ghz Pentium, 533Mhz Front side bus, 512Mb DDR 333Mhz RAM, 120Gb 7200rpm disk. They total about 1/5 the time it took on my old 333Mz Pentium 1 with 96Mb of memory. Probably wouldn't see such speedup in the actual scan time on a USB 1.0 scanner. SCSI has a lot more bandwidth.

Moose

C.H.Ling wrote:

I don't have the LS2000 anymore, just test the LS4000, ignore auto focus and
auto exposure timing, with a 2.4GHz PC and 768MB RAM Window ME. No ICE and
filters. auto crop in vuescan, similar cropping in Nikon SW.

Vuescan - 61 seconds for scan, 29 seconds for saving the cropped file.
Nikon original software, color management off - 51 seconds total.

ICE on

Vuescan - 70 seconds for scan, 50 seconds for saving the crop.
Nikon original software, color management off - 81 seconds total.

The crop file saving time in Vuescan is depends on the CPU speed, it was
very slow when I was running a 500MHz AMD (one year ago) and 256MB RAM. It
probably took four times in the post saving time.



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