The problem is that many new IA pdf files have a poor resolution / too high compression from beginning, so their quality can't be improved.
IA viewer doesnìt use pdf or djvu file, it uses jpg images coming from jp2 images; this explains why images seen by the viewer are so beautiful, while pdf or djvu files are poor. @Sam: About uploading djvu into IA item lacking of it: no, nobody but the original contributor or a sysop can upload files into an item. But it can be uploaded as a new item linked with the original one; its link could be shown into source item adding a comment (a "review"), 2017-01-02 12:52 GMT+01:00 Ankry <[email protected]>: > > Very interesting. > > > > About djvu files on IA, they can be built simply by pdf2djvu from pdf > > files > > of IA, but quality is very poor; > [...] > > Did you try to set the -d parameter to something higher than the default > 300? > While converting PDF files from Polish digital libraries, I often use -d > 450 or -d 600 with good results. > > Ankry > > > > _______________________________________________ > Wikisource-l mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikisource-l >
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