For ImageMagick, you need something like this, but you need an updated version of imagemagick which I could not find
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{{Note box| For ImageMagick you need ImageMagick php-pecl-imagick but the versions in EPEL are not modern enough.
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I believe you can install the latest version using the remi repo - https://wiki.contribs.org/Remi but you may need to use SCL and upgrade PHP to v 5.4 but I have not tested this.