Re: two images (again)

Dear Members of the SED group:

Thank you very much for your interest on my questions.

I'm very glad to meet you and know about your skills.

regards

edgar
-- 
edgar suarez kummers

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Did you look here:

http://www.imagemagick.org/Usage/windows/#why


in particular this snippet:

"

Specialities and pitfalls
Quite extraordinarily for Windows programs, IM allows images to be written
to stdout and read from stdin and thus use piping to cascade image
processing tasks. The operation


 convert -size 128x128 xc:white gif:- | convert - test.gif

is equivalent to


 convert -size 128x128 xc:white test.gif

In the first command of the pipe, the minus operator tells IM to write the
image to stdout, while the minus operator in the second command of the pipe
tells IM to read the image from stdin. This was of proceeding allows to
avoid the explicit use temporary files. It is especially useful if some
command does not offer certain operations, for example trimming:


 montage -tile 2x2 -geometry 400x300+60+60 1.png 2.png 3.png 4.png miff:- |
convert - -trim montage.png

As a consequence of this feature, textual output is usually written to
stderr instead of stdout. For example: if you want to redirect the textual
output of Compare to a text file, you would have to write


 compare -metric PSNR 1.png 2.png dif_1_2.png 2>result.txt

So you have to redirect stderr ("2>") to the text file, not stdout ("1>" or
just ">").


"

Maybe the only problem is the lack of proper redirection. (see^ directly
above)

Maybe,


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