2004.01.22 07:39 "Re: [Tiff] change fax resolution", by Andrey Kiselev

2. Reduce the height to 50%, so I get a PNG image of 1728x1140 using something like ImageMagick

Alternatively, you could do the resampling yourself. It's really not that difficult, and can be very fast, since you reduce each group of 2 pixels to a single pixel. But of course, doing just that, you end up with 3 different grayscale values including black and white, instead of just black and white.

Why not just skip every 2nd line in the input image? It should give similar results, I guess.

Andrey

Andrey V. Kiselev
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