A method of determining whether a biometric object is part of a live individual is described. In one such method, image information is acquired from the biometric object by using a sensor, such as an ultrasonic sensor. The image information may be analyzed in at least two analysis stages. One of the analysis stages may be a temporal analysis stage that analyzes changes in the image information obtained during a time period throughout which the biometric object was continuously available to the sensor. For example, a dead/alive stage may analyze differences between image information taken at two different times in order to identify changes from one time to the next. Other stages may focus on aspects of a particular image information set, rather than seeking to assess changes over time. These other stages seek to determine whether an image information set exhibits characteristics similar to those of a live biometric object.
申请公布号
WO2016037078(A1)
申请公布日期
2016.03.10
申请号
WO2015US48583
申请日期
2015.09.04
申请人
QUALCOMM INCORPORATED
发明人
DU, ELIZA YINGZI;CHEN, MING YU;VURAL, ESRA;CHAN, KWOKLEUNG;BURNS, DAVID WILLIAM;GANTI, SURYAPRAKASH;SCHNEIDER, JOHN KEITH;BANDYOPADHYAY, SAURAV;GU, JIN