the -size and -resize options are ignored if the output is a fax filetype

[atariZen]

The source file has geometry 2592x1944+0+0

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$ convert color_source.jpg -threshold 30% -rotate 90 -size 1734x2156 output.fax
$ identify -verbose output.fax | grep geom
Page geometry: 2592x2592+0+0

Imagemagic does the wrong thing when I omit the "-size" parameter. It should produce a fax-conforming file, which means one of 3 possible geometries. Instead it creates a file with geometry 2592x2592+0+0. So in the example above I micro-managed it, and tried to force a proper geometry. The parameter was ignored. The "-resize" option also fails to have effect:

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$ convert source.jpg -threshold 30% -rotate 90 -resize 1734 output.fax
$ identify -verbose output.fax | grep geom
Page geometry: 2592x2312+0+0

[fmw42]

I am not sure why that does not work. It fails for me on IM 6.9.9.34 Q16 Max OSX.

Try

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convert source.jpg -resize 1734 -rotate 90 -threshold 30% -compress FAX output.tif

or

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convert source.jpg -resize 1734 -rotate 90 -threshold 30% -compress Group4 output.tif

See https://www.imagemagick.org/script/comm ... p#compress