When I needed ImageMagick on Centos the default installer came with a version some 400 verison back.
Installing the latest version was a bit wiry so here it goes:
wget “http://www.imagemagick.org/download/linux/CentOS/i386/ImageMagick-6.8.6-9.i386.rpm”
yum install bzip2-devel freetype-devel libjpeg-devel libpng-devel libtiff-devel giflib-devel zlib-devel ghostscript-devel djvulibre-devel libwmf-devel jasper-devel libtool-ltdl-devel libX11-devel libXext-devel libXt-devel lcms-devel libxml2-devel librsvg2-devel OpenEXR-devel
yum install fftw-3.2.1-3.1.el6
download libltdl3-1.4.3-9sls.i586.rpm
wget “ftp://ftp.pbone.net/mirror/ftp.rpmhelp.net/pub/releases/1.0-CURRENT/i586/RPMS/libltdl3-1.4.3-9sls.i586.rpm”
install it :
yum install libltdl3-1.4.3-9sls.i586.rpm
yum install ImageMagick-6.8.6-9.i386.rpm
Voila.
nJoy;