Finger sensor apparatus using image resampling and associated methods
AssigneeAuthentec, Inc.
InventorsDale R. Setlak, Barbara E. Cornett, Kuntal Sengupta
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Abstract
A finger sensor may include a plurality of finger image sensing arrays for generating a respective plurality of finger image data sets based upon sliding finger movement over the finger image sensing arrays, and a processor cooperating with the finger image sensing arrays. The processor may determine finger movement based upon the finger image data sets, and generate a resampled finger image data set by resampling the finger image data sets based upon the determined finger movement. The processor may further deskew the finger image data sets when generating the resampled finger image data set.
Claims26
A finger sensor apparatus comprising:
- a plurality of finger image sensing arrays for generating a respective plurality of finger image data sets based upon sliding finger movement over said plurality of finger image sensing arrays;
- and
- a processor cooperating with said plurality of finger image sensing arrays for determining finger movement based upon the plurality of finger image data sets, and for generating a resampled finger image data set by resampling the plurality of finger image data sets based upon the determined finger movement by at least
- using the determined finger movement to arrange the plurality of finger image data sets into a single array to thereby generate a supersampled finger image data array having a resolution greater than a resolution of each finger image data set, and
- downsampling the supersampled finger image data array to generate a downsampled finger image data array having a resolution lower than the resolution of the supersampled finger image data array and thereby defining the resampled finger image data set.
An electronic device comprising:
- a housing;
- and
- a finger sensor apparatus carried by said housing and comprising
- a plurality of finger image sensing arrays for generating a respective plurality of finger image data sets based upon sliding finger movement over said plurality of finger image sensing arrays, each of said plurality of finger image sensing arrays comprising a linear array of integrated circuit finger image sensing pixels, and
- a processor cooperating with said plurality of finger image sensing arrays for determining finger movement based upon the plurality of finger image data sets, and for generating a resampled finger image data set by resampling the plurality of finger image data sets based upon the determined finger movement by at least
- using the determined finger movement to arrange the plurality of finger image data sets into a single array to thereby generate a supersampled finger image data array having a resolution greater than a resolution of each finger image data set, and
- downsampling the supersampled finger image data array to generate a downsampled finger image data array having a resolution lower than the resolution of the supersampled finger image data array and thereby defining the resampled finger image data set.
A finger sensing method comprising:
- generating, using a processor, a respective plurality of finger image data sets based upon sliding finger movement over a plurality of finger image sensing arrays;
- determining, using the processor, finger movement based upon the plurality of finger image data sets;
- and
- generating, using the processor, a resampled finger image data set by resampling the plurality of finger image data sets based upon the determined finger movement by at least
- using the determined finger movement to arrange the plurality of finger image data sets into a single array to thereby generate a supersampled finger image data array having a resolution greater than a resolution of each finger image data set, and
- downsampling the supersampled finger image data array to generate a downsampled finger image data array having a resolution lower than the resolution of the supersampled finger image data array and thereby defining the resampled finger image data set.
Dependencies are inferred from the claim text.