[pdftex] Image downsampling

[Thierry Bouche]

Le lundi 10 mars 2003 à 19:19:40, Elmar Haneke écrivit :


>> the question is not pdftex, it is what you use in order to get a PDF
>> version of the included images. If you use ghostscript at 300 dpi, then
>> you downsample if it were 1200 dpi...

EH> For what reason should anyone transform bitmap images to PDF first to 
EH> include them into PDFTeX? PDFTeX can include PNG files directly.

lots of possible reasons...

you have an illustration which is combined vector/bitmap done in e.g.
illustrator, you make a PDF for pdftex inclusion.

you have a black & white text scanned as TIFF g4 which would be
horrendously bigger as png zipped, you make a PDF with the included G4
data and include that.

you have many big files and know that pdftex is much faster at including
untouched pdf than png that it decompress/recompress

etc.

 Thierry Bouche