2004.01.22 09:20 "Re: [Tiff] change fax resolution", by Joris Van Damme
Why not just skip every 2nd line in the input image? It should give similar results, I guess.
At least theoretically, that can't yield the sample quality as resampling + dithering. But dithering has its artefacts, too, destination space is the same, so... I guess
- either resolution is low, in which case I don't recommend skipping every 2nd line since some meaningfull lines or parts of text and such may be (almost) horizontal and just one pixel wide and skipping may in that case lead to really undesirable results
- or either resolution is high enough, and skipping every 2nd line probably is almost as good as resampling + dithering despite of theoretical difference.
Joris Van Damme