Patent ID: 7254255
Filing Date: 2007-08-07
Classification: G06K

Abstract:
1. A biometric sensor device comprising: a translucent platen having a first side against which a body member to be analyzed is placed, and a second side; at least one infrared (IR) light source located adjacent the first side of the translucent platen for transmitting IR light through the body member and the translucent platen to the second side of the translucent platen; an optical image sensor located adjacent the second side of the translucent platen for detecting IR light transmitted through the body member and the translucent platen; and data storage and processing means for storing and processing signals output from the optical image sensor; data storage and data processing means being adapted to store and process a plurality of images obtained from the optical image sensor in response to IR light transmitted from the IR light source through an object placed on the translucent platen to determine whether the object is a live body member, the data processing means being adapted to analyze relative intensities of the plurality of images to determine whether variations in those intensities are consistent with characteristics indicative of a human heartbeat.