MULTI-RESOLUTION FINGERPRINT SENSOR

摘要

Multi-resolution fingerprint sensors and methods of using the same are provided. The multi-resolution fingerprint sensors each include a portion of the imaging area or region of the sensor that provides higher imaging resolution than the remaining imaging area of the sensor. The area of higher resolution is useful for anti-spoofing purposes, but because only a portion of the sensor is higher-resolution, advantageously it will not impact hardware costs nearly as much as a sensor that was higher resolution over its entire imaging area. Furthermore, the higher resolution area can be down-sampled so there would be no impact on the standard matcher and image processing software stack, which expects a uniform resolution for the entire image acquired.

主权项

1. A method of processing an image obtained with a multi-resolution biometric sensor having a first sensing region and second sensing region, the first sensing region having a resolution lower than a resolution of the second sensing region, the method comprising:
acquiring a first image of an input object, the first image including an area of the input object imaged by only the second sensing region of the multi-resolution sensor; acquiring a second image of the input object, the second image including an area of the input object imaged by both the first sensing region and the second sensing region of the multi-resolution sensor; and processing each of the first image and the second image to determine biometric information of the input object.