Abstract: A method of calculating the authenticity of a signature acquired online from a touch sensitive computer display within a mobile or stationary device comprises comparing extracted strokes from a second signature to those of a known genuine signature to determine the degree of matching. The strokes are obtained by decomposing the velocity image of each signature into low medium, and high velocity portions; decomposing the medium velocity portion into two partitions; and extracting strokes from each partition into contiguous parts.

Abstract: A method for automated fingerprint identification and special purpose programmed computer for carrying out the method are disclosed.

Abstract: A method for improving the detection of low-contrast and narrow width vessels comprising combining matched-filter responses with that of directional filter bank. A given vessel is characterized by having an elongated structure with a specific width and direction. Matched filters are designed in the form of elliptical second-order Gaussian derivatives at various scales, catering for vessels of widely varying widths. On the other hand, the directional filter bank helps in identifying the orientation of the vessels. Thus, combining both in complementary manner results is an improved response for vessels with varying width and varying direction. Results comparing this hybrid approach to matched filter and directional filter bank alone show substantial improvements both qualitatively and quantitatively.