John Henry Morrissey is a notable inventor based in Chappaqua, NY (US). He has made significant contributions to the fields of character recognition and signature verification. With a total of 2 patents, Morrissey's work has enhanced the efficiency and accuracy of handwriting analysis systems.

Latest Patents

Morrissey's latest patents include a segmentation mechanism for cursive script character recognition systems. This invention involves a method and apparatus for effecting character segmentation in a cursive script handwriting analysis system. It comprises obtaining the continuous x and y coordinates and the x and y velocities of a writing instrument forming said cursive character. The system continuously averages the x displacement associated with all the x and y extremal points of a handwritten character where the x or the y velocity equals zero. It successively examines the x displacement for each x-extremal and determines if the x displacement of said extremal exceeds a predetermined threshold value relative to the average x displacement of the current character. If so, it indicates that the new extremal is located in the next character, and a segmentation mark should be placed at a predetermined distance along the ligature between the just analyzed extremal and the previously analyzed extremal. The results of this segmentation are then communicated to a character recognition mechanism, whose efficiency and accuracy are greatly enhanced by said segmentation indication. The system is also designed to follow deviations from the baseline and mid-zone line as the writing progresses.

Another significant patent by Morrissey is a signature verification method and apparatus. This method verifies a sample signature based on the comparison of the dynamics of a reference and a sample signature. More particularly, second derivative values of pen displacements (i.e., acceleration) are periodically sampled for both a reference and sample signature, and a comparison of these second derivative values is made. According to the disclosed verification method, the two lists of second derivative values are segmented, and similar segments are individually compared and correlated utilizing shifting of the segments during successive comparisons to find regions of high correlation. A running account of cross-correlation values between successive segments of the two signatures is kept. Finally, the maximums of the cross-correlation values obtained for each segment comparison are combined, and this maximum correlation value is utilized as a verification indicator.

Career Highlights

Morrissey is currently employed at International Business

Profile summary based on public USPTO records.

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