Palm printing

The palms of the human hands contain pattern of ridges and valleys much like the fingerprints. The area of the palm is much larger than the area of a finger and, as a result, palmprints are expected to be even more distinctive than the fingerprints. Since palmprint scanners need to capture a large area, they are bulkier and more expensive than the fingerprint sensors. Human palms also contain additional distinctive features such as principal lines and wrinkles that can be captured even with a lower resolution scanner, which would be cheaper. When using a high-resolution palmprint scanner, all the features of the palm such as hand geometry, ridge and valley features (minutiae and singular points such as deltas), principal lines, and wrinkles may be combined to build a highly accurate biometric system.

In 2013, the NGI System deployed the new NPPS which contains millions of palm prints that are now searchable on a nationwide basis. The NPPS and improvements in latent fingerprint search performance are providing powerful new and enhanced crime-solving capabilities for more than 18,000 local, state, tribal, and federal law enforcement agencies across the US.

The research databases indicate upcoming developments in combining multiple imaging modalities to enhance performance of recognition.