![]() ![]() For example, I often download DjVu files from, but they often have a front page written by Google pretending Google has the right to limit use of the file to non-commercial purposes only or whatever. Basically, what I (used to) use DjVu Solo for is removing individual images from a package. I've seen the help page, but it doesn't tell me what I want to know. I don't know what "It encodes from PBM/PGM/PPM format" means, nor what ImageMagick is. Hesperian 22:05, 4 December 2008 (UTC) Reply Have you seen the corresponding help page? → Help:DjVu files Hesperian, I'm afraid I don't even understand your answer. It encodes from PBM/PGM/PPM format, so for most purposes you would need to use it in conjunction with ImageMagick. Its encoders are not the best, but overall it is very useful. Unfortunately I know of no DJVU editing software that has a nice GUI provided with it.- Zhaladshar (Talk) 18:25, 4 December 2008 (UTC) Reply I use DjVuLibre too. It's a command-line utility and can take some time to learn (it at least took me some time) but it's not a bad set of programs to use for DJVU manipulation. So does anyone know where I can either get a recent version of DjVu Solo or a recent version of some other DJVU editing program? An gr 16:47, 4 December 2008 (UTC) Reply I use DjvuLibre to edit the DJVU files I have. But I can't find a more up-to-date version of DjVu Solo. Is there free software I can download to edit DJVU files? I've been using DjVu Solo 3.1, but lately most files are saying that version is too old and they can't be read, so I should update. See also Help:Side by side image view for proofreading. The ProofreadPage extension makes this process quite easy. Once the file is uploaded to the commons, the text should be transcribed and proofread for Wikisource (or OCR'd, but OCR software does not work very well on texts with a lot of mathematical symbols).Example: commons:Image:Über die Vertauschung von Argument und Parameter in den Integralen der linearen Differentialgleichungen.djvu. Don't forget to fill out the info template, specify a licence, and categorise. The finished DjVu can the be uploaded to the Commons.Of course, this also means the compression is no longer lossless, so depending on your source material you may want to omit this option. The -clean option removes "flyspecks", leftover artefacts from the scanning process. Obviously, you may have to change the -dpi option depending on your situation. Once I have the PBM files ready, I convert them to DjVu using the cjb2 and djvm programs from the DjVuLibre suite:įor file in *.pbm do cjb2 -dpi 400 -clean "$file" "$file".djvu done. ![]() The reason I don't use any off-the-shelf image manipulation software is that they're often not sufficiently capable of handling bitonal files. I use a quick-and-dirty home-brewn pbmextract program for that which lets you specify the coordinates of the extraction rectangle (so you can read them off directly from some image manipulation program like The GIMP). Sometimes, the PBMs need to be cropped before they are converted to DjVu.If it's not already PBM, you can use convert like above to convert the files to PBM. The output file format depends on the format of the image embedded in the PDF. To convert PDF files to PBM, I use the pdfimages utility from the Xpdf suite.Will create rotated PBM files (Warning to mathematicians: the rotation algorithm uses left-handed (clockwise) rotation.) For example cd tifdir/įor file in *.tif do convert -rotate 90 "$file" "$file".pbm done Then I use the convert program from ImageMagick to convert the file to PBM (and possibly rotate the file in the process). Will create files named articleaaa.tif, articleaab.tif, and so on in the tifdir subdirectory. To convert TIFF files to PBM, I first create a subdirectory called tifdir and split the original TIFF into its individual pages with the tiffsplit program from libtiff:.When I work with the raw scans, I use the PBM file format (that's the format created by my personal scanner). ![]() Unfortunately, this option is not available in small libraries with old photocopiers. Plus, library photocopiers are much faster than my personal scanner. Not only are the fees much smaller than for creating hardcopies but this also saves an additional A/D step, leading to higher output quality. Normally, I let the machine send the copies directly to my private e-Mail address as 300dpi or 400dpi TIFF or PDF file. I'm most interested in old mathematics journal articles, and most libraries provide those only for reference, not for borrowing.
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