Imaging of biometric information based on three-dimensional shapes

• US 7,242,807 B2
• Filed: 05/05/2003
• Issued: 07/10/2007
• Est. Priority Date: 05/05/2003
• Status: Expired due to Fees

• Current Assignee: Fish & Richardson PC
• Original Assignee: Fish & Richardson PC
• Inventors: Medioni, Gerard, Tsoupko-Sitnikov, Mikhail, Waupotitsch, Roman
• Primary Examiner(s): Mancuso; Joseph
• Assistant Examiner(s): Yuan; Kathleen
• Application Number:
  US10/430,354
• Publication Number:
  US 20040223630A1
• Time in Patent Office: 1,527 Days
• Field of Search: 382/209
• US Class Current: 382/209
• CPC Class Codes: G06V 20/653 by matching three-dimensional models, e.g. conformal mapping of Riemann surfaces
• CPC Class Codes: G06V 40/169 Holistic features and representations, i.e. based on the facial image taken as a whole

Abstract

A device for carrying out of biometric identification by comparing face shapes. The shape of a first face is compared with the shape of a second face. A map can be determined between the shapes. The shape, and hence the comparison, is substantially independent of pose and lighting, and also parts of the shape can be removed from the comparison in order to enhance the recognition.

Claims

1. A method comprising:

obtaining a template representing a depth map of a known user'"'"'s face, said depth map including a mask that represents part, but not all, of the users face; and

comparing the template to another depth map to determine a match between the known user'"'"'s face, and the another depth map, further comprising processing the template by determining a tip of the nose within the template, and using said tip of the nose of the template to find other face parts, wherein said determining a tip of the nose comprises determining an intersection between the mask and a tilted plane, wherein said tilted plane is tilted at 7 degrees.