Lars Aronsson wrote:
For example, the image
http://runeberg.org/img/nfad/0670.4.png is
240 kbytes in 150 dpi 16-level grayscale PNG but only 200 kbytes
in 600 dpi bitonal TIFF G4. The difference between 150 dpi
grayscale and 600 dpi bitonal becomes very clear when you try to
print the page on a 600 or 1200 dpi laser printer.
Have you tried a comparison against a 600 dpi bitonal PNG? The DEFLATE
compression used in PNGs may or may not be as effective for bitone
images as G4, but it should still handle them pretty well.
--
Ilmari Karonen