Why imagicmagick compare giving unrecognized metric 'phash' error?

Question

I am running following command to compare phash of two images in ubuntu terminal

compare -metric phash 01.png 02.png compare.png

but it giving error that:

compare.im6: unrecognized metric type `phash' @error/compare.c/CompareImageCommand/728

my identify version is:

Version: ImageMagick 6.7.7-10 2014-03-06 Q16 http://www.imagemagick.org

Answer 1

You get this error because the phash metric has been added in version 6.8.8-2. I would advise you to upgrade to the latest version if you need this feature.