The CPD file extension is associated with the SmartWare. File contains compiled printer descriptor.
Compressed image format used by PhotoDefiner, a program used for enhancing and compressing digital imaging content; incorporates lossless compression that uses the "new bytes value representation" theoretic approach and the LZMA library; permits up to 30% more compression than a similar .PNG file. CPD lossless compression can be used to re-compress PNG files.