Imagemagick compare executable: unrecognized option `-metric

[truenrush]

I tried to use

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apt-get install imagemagick

command to install ImageMagick on my debian wheezy. But when i try to diff images, i get following error:

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root@work:/home/tests/YAML_SHOTS/en-us# convert 1.png 2.png -metric RMSE -compare 3.png 
convert.im6: unrecognized option `-metric' @ error/convert.c/ConvertImageCommand/2060.

Seondly, i tried to install ImageMagic from binary source (described here: http://www.imagemagick.org/script/insta ... e.php#unix). But it does not install convert executable command.

How i can fix that?

P.S. If i remove -metric option, i get one more error:

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convert.im6: unrecognized option `-compare' @ error/convert.c/ConvertImageCommand/1107.

[fmw42]

What version of IM are you using? If older than 6.8.6-9, then you need to upgrade IM or use compare rather than convert.