[rescue] Scanning Best Practices - was Re: Inside Solaris newsletter
jp at celestrion.net
Sun Oct 5 20:59:10 CDT 2014
On Thu, 2 Oct 2014, Toby Thain wrote:
> 3) Be very careful with DJVU compression - it is lossy! - the results can be
> surprisingly dangerous. I can't find the link now, but there are published
> examples of schematics involving substituted numbers (literally one digit for
> another). It's clearly a risk derived from the way djvu works. Use lossless
> TIFF LZW or similar.
My understanding is that those instances are from defects in Xerox
firmware, not from the design of djvu. Still, as a general, rule, do not
use lossy compression for archival. Data are precious; do not discard
Jonathan Patschke | "Do the difficult things while they are easy and do
Elgin, TX | the great things while they are small."
USA | --Lao Tzu
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