Ganesh Sittampalam (hsenag) wrote,
Ganesh Sittampalam

Canon scanner grumbles

We have a CanoScan 4400F. Recently I've been trying to scan lots of pieces of paper into PDF format so I can dispose of the originals.

Annoyingly, the scanner is completely unsupported under Linux, so I'm having to do this all with Windows. After looking around at the free options for a while, I settled on using the bundled "CanoScan Toolbox" software which mostly works quite well and integrates with buttons on the scanner so I don't have to change focus on my PC to the application to tell it to scan the next page.

In the process of using it heavily, I have discovered that

  1. it leaks virtual memory, so you have to restart it every 100-200 pages or it hits the 2GB limit! Naturally you discover this when it has a whole lot of pages you just scanned sitting in memory which you now can't save.

  2. it seems to use a quadratic time algorithm for writing PDF files to disk.

So all in all it's not going too badly, as long as I only scan long things in batches of 50 pages or so and remember to restart it every so often. It's a shame that stupid things like this spoil what's generally a reasonably usable piece of software.
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