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 <ankry(a)mif.pg.gda.pl>pl>:
About djvu files on IA, they can be built simply by pdf2djvu from pdf
of IA, but quality is very poor;
Did you try to set the -d parameter to something higher than the default
While converting PDF files from Polish digital libraries, I often use -d
450 or -d 600 with good results.
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