SYSTEM AND METHOD OF IMAGE RECONSTRUCTION WITH DUAL LINE SCANNER USING LINE COUNTS

摘要

A fingerprint scanning and image reconstruction system and method including a fingerprint scanner providing a first scan line and a second scan line separated by a line separation distance in a scanning direction. The system includes an image reconstruction module accumulating scan lines including at least the first scan line and the second scan line over a time period t. The image reconstruction module a value for decimation (t) necessary to produce a selected y axis resolution in the scanning direction based at least in part on (line count(t)/line separation distance)*a selected y resolution, where line count(t) is the number of lines accumulated in time t, and decimation(t) indicates of whether the line count(t) is greater than or less than the number of lines accumulated as a function of the time period t that will result in a selected reconstructed image y resolution in the scanning direction.

主权项

1. A method of scanning a biometric object moving in direction of swiping and reconstructing an image of the biometric object, the method comprising:
scanning a first scan line utilizing a first linear array of biometric object scanning elements and a second scan line utilizing a second linear array of biometric object scanning elements, the first linear array of biometric object scanning elements and the second linear array of biometric scanning elements being separated by a scanning line separation distance in the direction of swiping the biometric object, and sampling, respectively, at a first scanning time and a second scanning time; and reconstructing the biometric object image, based in part on at least one of the scanning line separation distance and the time period between the first scanning time and the second scanning time, without calculating a velocity of the biometric object moving in the scanning direction.