Re: image's height in -geometry ?..

> I could ask "identify":
>   height=`identify $im | sed -e 's/.* [0-9]*x\([0-9]*\) .*/\1/g'`
> ... if i used bash, but i need this under windows :O(

You can use the ouput of the identify command in a Windows batch file, too.

The general technique is explained at
http://www.imagemagick.org/Usage/windows/#single
and
http://www.imagemagick.org/Usage/windows/#calc_set
presents and example that comes quite close to what you are looking for and
http://www.imagemagick.org/Usage/windows/#vb_example
demonstrates how to read the output from an IM command line tool with 
VBScript. So you don't necessarily need a bash shell, it can be all done 
in Windows itself.

Wolfgang Hugemann