Package: pnm2ppa

"pnm2ppa" package binaries on CentOS:

/usr/bin/calibrate_ppa /usr/bin/detect_ppa /usr/bin/pbm2ppa /usr/bin/pbmtpg /usr/bin/pnm2ppa /usr/bin/test_ppa

You may install this package on CentOS with yum install pnm2ppa