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5848176 |
Fingerprint fingertip orientation detection method and device
The present invention has the object of accurately detecting fingerprint fingertip orientation by a process of calculating inner products of ridge directions in the peripheral areas of an inputted...
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5845005 |
Apparatus for fingerprint indexing and searching
An apparatus for indexing and searching a plurality of reference fingerprints to determine if a sample fingerprint matches one of the reference fingerprints includes a device for: determining...
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5841888 |
Method for fingerprint indexing and searching
A method for indexing and searching a plurality of reference fingerprints to determine if a sample fingerprint matches one of the reference fingerprints includes the steps of: determining...
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5838306 |
Mouse with security feature
A mouse computer input peripheral device includes a window area integrally constructed within the mouse and positioned at an area on the mouse upon which a user normally places a finger in...
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5832102 |
Apparatus for extracting fingerprint features
In order to extract position and direction of the first joint line of a fingerprint for stable pattern positioning in fingerprint comparison, an apparatus for extracting fingerprint features...
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5825907 |
Neural network system for classifying fingerprints
A system for automatically classification of human fingerprints. An unidentified fingerprint is processed to produce a direction map. The direction map is processed to generate a course direction...
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5825005 |
Method of encoding identification cards and verifying such encoded identification cards, and apparatus for carrying out such a method
A method of codifying and comparing an identification card includes imprinting the identification card with a selected fingerprint of the owner which upon match with a corresponding natural...
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5822445 |
Apparatus for identifying fingerprints
A fingerprint identifying device includes a transparent prism having a fingerprint receiving face, a fingerprint viewing face at an acute angle to the fingerprint receiving face, two opposed...
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5815598 |
Apparatus for identifying an individual based on a fingerprint image
In an individual identification apparatus, a hologram 11 recorded on a card is irradiated with laser light to read out a fingerprint image of a specific person. A finger of an arbitrary person to...
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5815252 |
Biometric identification process and system utilizing multiple parameters scans for reduction of false negatives
A system for verifying that a card possessor is the authorized card owner compares scanned fingerprint data with fingerprint data encoded on an optical card. More than one of the person's...
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5796857 |
Apparatus for fingerprint verification using different verification method in accordance with quality grade data
Feature points data and quality grade data of fingerprint images are stored in a data base with a respective register number of each fingerprint as an index for access. A verification method...
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5796858 |
Fingerprint sensing system using a sheet prism
In one embodiment, a fingerprint sensing system includes a sheet prism having a sensing surface and a number of prismlets positioned opposite to the sensing surface. Each prismlet has an entrance...
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5778089 |
Driver circuit for a contact imaging array
A fingerprint sensing device and recognition system includes an array of closely spaced apart sensing elements each comprising a sensing electrode and an amplifier circuit. The device is used to...
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5757278 |
Personal verification system
A plurality of linear electrodes, which are perpendicular to the longitudinal direction of a finger to be measured, are arranged on a substrate. A porous film is placed on the electrodes. The...
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5748766 |
Method and device for reducing smear in a rolled fingerprint image
A fingerprint image capture system reduces tip smear by ceasing to update a data array characteristic of the rolled fingerprint image behind an advancing freeze column at least about half way from...
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5748765 |
Modifying a database using a fingerprint form
A method of modifying a database using a fingerprint form. User account information is entered into a computer database record and is marked as incomplete. A fingerprint form is then generated...
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5740276 |
Holographic method for encrypting and decrypting information using a fingerprint
A method using a fingerprint image as a cipher for optical encrypting and decrypting information which is presented in the form of an analogous signal. The method includes recording a Fourier...
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5736734 |
Liquid platen fingerprint image enhancement
A fingerprint enhancement system has a platen with a liquid contacting and finger-touching surface. Two collimated interrogating light beams lie below and are opposite sides of the finger-touching...
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5737071 |
Method and apparatus for enhancing live-scan fingerprint reader images
A method and apparatus for improving the optical boundary between a person's fingerprint ridges and the surface platen of a live-scan-imaging apparatus includes providing an absorbent pad...
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5717777 |
Longest line method and apparatus for fingerprint alignment
A non-minutia method and apparatus for comparing a reference fingerprint image to a candidate fingerprint image are disclosed. During enrollment of a reference image, a unique reference set of data...
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5701770 |
Gun safe with dual method of gaining access therein
A gun safe with dual method of gaining access therein including a portable housing having a top face, a bottom face, a pair of side faces and a pair of end faces formed therebetween thereby...
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5703958 |
Picture processing method for correcting distorted pictures and apparatus for executing this method
A picture processing method for correcting distorted pictures is provided. A plurality of starting points are displayed on the boundary of the picture to be corrected. An operator enters motion...
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5689576 |
Surface feature mapping using high resolution C-scan ultrasonography
An ultrasonic system and method for imaging a surface wherein a C-mode ultrasonic scan is performed over a fixed area of the surface and range gating is applied to that area to a given depth below...
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5680205 |
Fingerprint imaging apparatus with auxiliary lens
The invention is concerned with apparatus for use in a fingerprint imaging system, of the type comprising a light source; a fingerprint testing station for producing and transmitting an image of a...
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5661451 |
Antitheft system for motor vehicles
In the case of an antitheft system for motor vehicles comprising several control apparatuses for vehicle components, which can be cleared when a fed testing information corresponds to a...
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5650842 |
Device and method for obtaining a plain image of multiple fingerprints
A device for providing a plain image signal indicative of a plain image of surface characteristics of more than one finger on a hand includes an plain platen prism having a flat, rectangular shaped...
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5644645 |
Fingerprint image transmission system utilizing reversible and non-reversible data compression coding techniques
A fingerprint image transmission system includes a remote computer system and a central computer system. In the remote computer system, a gray image of a fingerprint image sampled by an image...
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5633947 |
Method and apparatus for fingerprint characterization and recognition using auto correlation pattern
Apparatus for use with an autocorrelation technique for characterizing fingerprints includes an imaging device for providing an image of a fingerprint. The image so produced is then utilized by a...
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5631972 |
Hyperladder fingerprint matcher
A fingerprint matcher links together minutiae from a search print and minutiae from a file print in a chain to determine if the two prints match. Minutiae are extracted from the images of the...
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5623552 |
Self-authenticating identification card with fingerprint identification
A self-authenticating identification card includes a fingerprint sensor for authenticating the identity of a user. An ID card memory permanently stores information related to a fingerprint of the...
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5621516 |
Optical device for forming an image of an uneven surface
An optical device for forming an image of an uneven surface, including a plane-parallel plate with a pair of parallel plane surfaces which is made of a transparent material having a refractive...
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5613013 |
Glass patterns in image alignment and analysis
A system and method is provided for aligning and analyzing multiple images using Glass patterns. A Glass pattern is a Moire-like pattern obtained by superimposing an image on a transformed version...
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5613014 |
Fingerprint matching system
An image comparison arrangement uses an electronic computer to compare digitized fingerprint minutia maps of fingerprints of an unknown fingerprint set with corresponding maps of reference...
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5610993 |
Method of co-centering two images using histograms of density change
An image positioning method for co-centering two images including ridges with each other, first a density value of each pixel of an image to be examined and a reference image are calculated. A...
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5608811 |
Method of smoothing a ridge direction pattern and an equipment used therefor
An energy function is defined as a linear sum of a discrepancy evaluation function and a dispersion evaluation function. Direction variables of all the subregions of a ridge direction pattern are...
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5598485 |
Apparatus for performing a joint fourier tranform utilizing apertures of low correlation
A spatial Fourier transforming apparatus jointly Fourier transforms a plurality of input images to obtain a Joint Fourier transform image of the plurality of input images. The apparatus comprises:...
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5596454 |
Uneven surface image transfer apparatus
Enhanced performance of an uneven surface image transfer apparatus is provided by using a well-defined convergent field of illumination that is nominally focussed at the stop of an imaging lens. An...
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5563345 |
Device for ultrasonic identification of fingerprints
A device for identifying fingerprints by use of ultrasound having an electronic evaluating circuit, a hollow cylinder of length L with a cover and a base plate, wherein the ultrasonic speed through...
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5555314 |
Fingerprint data processing method
The present invention provides a method of processing an unknown physical fingerprint for use in a data processing system to verify/identify an unknown fingerprint. The method involves obtaining an...
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5551295 |
Method and apparatus using ultrasonic and light waves for identification of test specimens
The invention relates to a method and an apparatus for determining the authenticity and/or for identifying the respective spatial structure of a test specimen. The test specimen is placed on a...
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5552766 |
Anti-crime security system
An anti-crime security system which provides an entrance and an exit to an establishment, wherein the entrance and exit define an enclosed area, provides sensors to monitor ingress and egress...
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5519785 |
Correcting method for directional data of streaked patterns and information processing apparatus for executing it and correcting method for pitch data of streaked patterns and information processing apparatus for executing it
A method and an apparatus for correcting directional data and pitch data are provided. Initially, a picture of a streaked pattern and corresponding directional data having a plurality of zones are...
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5509083 |
Method and apparatus for confirming the identity of an individual presenting an identification card
A system for confirming the identity of an individual presenting an identification card includes a card reader, an associated central processing unit, a preselected feature template library...
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5493621 |
Fingerprint ID system and method
A fingerprint ID system, which compares input fingerprint image data with registered data, with a digital signal processor exclusive for image processing use, indpendently of a central processing...
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5465303 |
Automated fingerprint classification/identification system and method
An automated fingerprint classification and identification system used to determine or verify the identity of an unknown person by comparing one or more of the person's fingerprints (i.e., the...
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5448659 |
Waveguide-type image transmission device and fingerprint identification device
A card-shaped waveguide-type image transmission device has an image transmission base member piled up on a light illumination base member, and an optical system such as grating patterns and...
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5429006 |
Semiconductor matrix type sensor for very small surface pressure distribution
An analog finger print reader comprises a matrix of electronic switches selectively controlled from a matrix of individually associated electrodes. A thin film having a conductive surface is...
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5420937 |
Fingerprint information extraction by twin tracker border line analysis
A method for minutia extraction from a digitized fingerprint array by twin tracker border line analysis includes scanning the array to detect ridge pixels, setting up a pair of tracker pixels or...
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5420936 |
Method and apparatus for accessing touch screen desktop objects via fingerprint recognition
A method of manipulating and obtaining access to graphical desktop objects is disclosed. Touch-sensitive fields are provided on a computer display for user selection. Upon selecting one of the...
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5400662 |
Matrix type surface pressure distribution detecting element
A surface pressure distribution matrix of detecting elements requires no positioning operation during a manufacturing process and does not vary in sensitivity depending on where surface pressure is...
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