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This reminds me of my time in university, when I saved all my lecture notes as DjVu [1] files. It's a great file format for space-efficient archiving of scans
by trurl42 9y ago
This reminds me of my time in university, when I saved all my lecture notes as DjVu [1] files.
It's a great file format for space-efficient archiving of scans like that, with a bit of scripted preprocessing.
[1]: https://en.wikipedia.org/wiki/DjVu https://en.wikipedia.org/wiki/DjVu
- dunham 9y agoI like the idea, but DjVu seems to be very proprietary / single vendor and not in widespread use. This has made me reluctant to use it for archival purposes (vs say PDF, which has its own issues, but feels slightly more future proof to me). I think PDF can cover pretty much the same ground with JBig and Jpeg2k. (And I believe archive.org is doing that.) But I don't know of any open source code to do the segmentation / encoding. (You have to split the bitmap from the background for jbig / jpeg encoding.)
- pwg 9y agoThere is an open-source DjVu library as well: http://djvu.sourceforge.net/ http://djvu.sourceforge.net/ Whether that makes the format "widespread" enough for your use case is of course your decision to make.
- mcguire 9y agoThe major source for DjVu files I have run across is the Internet Archive's book scanning. (Weirdly, I can't find any examples.) They're usually smaller than PDFs.