1
John P Riganati, Visvaldis A Vitols: Automatic pattern processing system. Rockwell International Corporation, L Lee Humphries, H Fredrick Hamann, Rolf M Pitts, April 24, 1979: US04151512 (190 worldwide citation)

An automatic system is described wherein pattern representations of epidermal ridges, such as fingerprints, are uniquely described by the extraction of specific information. Specific information such as ridge contour data, describing the ridge flow in the fingerprint pattern and minutiae data, princ ...


2
Paul L Feintuch: Adaptive recursive least mean square error filter. Rockwell International Corporation, H Fredrick Hamann, Rolf M Pitts, George Jameson, July 26, 1977: US04038536 (109 worldwide citation)

An adaptive recursive filter is disclosed which, in a preferred embodiment, comprises first and second adaptive transversal filters selectively coupled together to minimize the mean square error of the output data of the recursive filter based upon observations of input data to the recursive filter. ...


3
Tien Lin Chang, Jimmy H Kabaian, John P Riganati, Stanley A White: Non-fingerprint region indicator. Rockwell International Corporation, L Lee Humphries, H Fredrick Hamann, Rolf M Pitts, September 30, 1980: US04225850 (102 worldwide citation)

Signalling means for enhancing the performance of automatic fingerprint identification systems by reducing system response to non-fingerprint-like regions within an image field pattern of interest. A two dimensional generalized sequency analyzer, such as a fast Fourier transform machine, responsive ...


4
John P Riganati, Visvaldis A Vitols: Minutiae pattern matcher. Rockwell International Corporation, L Lee Humphries, H Fredrick Hamann, Rolf M Pitts, January 16, 1979: US04135147 (83 worldwide citation)

A system which, in one exemplary embodiment, comprises first means responsive to minutiae of first and second fingerprints for selectively generating a plurality of neighborhood comparison signals indicative of the closeness of match and coordinate displacements between minutiae neighborhoods of the ...


5
Visvaldis A Vitols, James E Paul Jr: Keyword detection in continuous speech using continuous asynchronous correlation. Rockwell International Corporation, H Frederick Hamann, Rolf M Pitts, George Jameson, March 28, 1978: US04081607 (81 worldwide citation)

A system for detecting one or more keywords in continuous speech is disclosed wherein a speech processor extracts a plurality of analog speech parameters from the input continuous speech, an STV (Spectral Time Vector) generator circuit selectively converts the plurality of analog speech parameters i ...


6
Samuel T Costanza, Peter G Franklin, Frank L Gebhardt, Jack D Israel, Charles R Moore, Charles E Wheatley III: Communication system. Rockwell International Corporation, L Lee Humphries, H Fredrick Hamann, Rolf M Pitts, January 3, 1978: US04066964 (76 worldwide citation)

This invention relates to a communication system wherein a plurality of stations can communicate with each other, without going through a central switchboard; and more particularly to such a communication system that is as private as possible -- the commmunication system having, in addition, the cap ...


7
John P Riganati, Visvaldis A Vitols: Two-dimensional binary data enhancement system. Rockwell International Corporation, H Fredrick Hamann, Rolf M Pitts, George Jameson, January 11, 1977: US04003024 (72 worldwide citation)

A system for enhancing a binary data bit stream derived from a two-dimensional pattern image wherein, in a preferred embodiment, each data bit in the bit stream and a preselected group of bits associated therewith are sequentially stored in a first location and in associated preselected locations, r ...


8
Gregory W Evans, James E Paul: Autonomous, check-pointing, navigational system for an airborne vehicle. Rockwell Internation Corporation, L Lee Humphries, H Frederick Hamann, Rolf M Pitts, December 18, 1979: US04179693 (62 worldwide citation)

An autonomous navigational system for an airborne vehicle is disclosed which automatically updates its position and heading coordinates at each of a plurality of checkpoints along a preselected flight path. Prestored in a memory of the navigational system is a plurality of reference map images respe ...


9
Visvaldis A Vitols, Stanley A White: System for expanding the video contrast of an image. Rockwell International Corporation, L Lee Humphries, H Fredrick Hamann, Rolf M Pitts, February 5, 1980: US04187519 (59 worldwide citation)

A system, and method, is disclosed for substantially increasing the dynamic range of contrast of an input sequence of pixels representative of an image. In a preferred embodiment a first circuit is responsive to an input sequence of pixels representative of an image for developing bias and gain para ...


10
John P Riganati, Richard D Capello, Gerald D Brown, Norman L Bolton, Alexander Csiszer: Method and apparatus for automatic extraction of fingerprint cores and tri-radii. Rockwell International Corporation, L Lee Humphries, H Fredrick Hamann, Rolf M Pitts, May 22, 1979: US04156230 (46 worldwide citation)

A method and apparatus for the smoothing and singularity detection of the ridge contour data of a fingerprint image for classification in an automatic fingerprint identification system. A template scanning window is passed electronically over a digital matrix of ridge contour data to generate a set ...