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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...
5572597 Fingerprint classification system  
A technique for fingerprint classification and/or identification, in which a fingerprint is defined by areas containing patterns of ridges and valleys. At least one local pattern is determined...
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...
5524161 Fingerprint image processing system capable of simply processing minutiae  
In a fingerprint image processing system for use in processing a fingerprint image prior to identification of a fingerprint, edition or correction is made by adding true minutiae and/or deleting...
5497429 Apparatus for automatic fingerprint classification  
In fingerprint pattern classification, radial scanning vectors are used. A space between two adjacent ridge lines including a core point is traced by radial scanning. Radial distribution of number...
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...
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...
5426708 Fingerprint scanning device for use in identification  
In a fingerprint scanning device for use in identification, a fingerprint image input device is provided to photoelectronically input a specified fingerprint of an entrant. A monochrome image data...
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...
5351304 Fingerprint data registration method  
A fingerprint data registering method which can clearly show the characteristics of minutiae by storing the information of an original image. The method includes thinning a fingerprint image into...
5337369 Equipment for fingerprint pattern classification  
In fingerprint pattern classification, use of delta data is avoided, since there is a large probability of a fingerprint missing delta data. Ridge line shape around a core of a ridge direction...
5321765 Method and apparatus for verifying identity  
The present invention relates to a method for verifying the identity of a person or for relating the identity of a person to a document or other thing presented by that person, which method...
5177792 Collation of a streaked pattern at a high speed  
On collating an input streaked pattern (fingerprint) with a reference streaked pattern, a local streak direction is extracted from a local area defined in the input streaked pattern by one of...
5109428 Minutia data extraction in fingerprint identification  
An apparatus used in fingerprint identification for extracting minutia data from fingerprint image data. An optical sensor unit optically produces a sequence of fingerprint image data during a...
5105467 Method of fingerprint verification  
A method of fingerprint verification includes determining a direction difference between a direction pattern of an input fingerprint and a direction pattern of a registered fingerprint and...
5088817 Biological object detection apparatus  
An apparatus for detecting and identifying a biological object. A transparent plate has a first surface onto which a light beam is projected and a second surface onto which a biological object to...
4953228 Apparatus for detecting pattern of crest line  
In an apparatus for detecting a pattern of crest lines according to the present invention, an object area to be treated is mechanically divided into a plurality of picture elements (Ej), and the...
4947442 Method and apparatus for matching fingerprints  
A method and apparatus for matching fingerprints is provided in which the collation rate is improved by using both characteristic and non-characteristic minutia for the collation process. An image...
4944021 Identification system employing verification of fingerprints  
An identification system for identifying authorized personnel compares a streaked pattern of a fingerprint of an individual with selected fingerprint patterns stored in memory of all authorized...
4936680 Method of, and apparatus for, edge enhancement of fingerprint minutia  
A method for enhancement of edge detail in fingerprint minutia first illuminates the finger with light passing through a polarizer in a first direction with respect to the polarization plane, for...
4896363 Apparatus and method for matching image characteristics such as fingerprint minutiae  
A system for matching images in which characteristic points of an image to be tested for a match, such as a fingerprint, are compared with characteristic points of a master image by attempting to...
4832485 Image enhancer  
An image enhancer for providing a sharp, contrasting image of a pattern, such as a fingerprint pattern is disclosed. In one embodiment, an image enhancer is comprised of a viscous, opaque liquid...
4817183 Fingerprint recognition and retrieval system  
Fingerprints are scanned by a scanning system (13). Topological systems for coding and comparing fingerprints are described including a system for recording a description of fingerprints. In a...
4790564 Automatic fingerprint identification system including processes and apparatus for matching fingerprints  
The invention is an automatic method and related apparatus for identifying fingerprints by means of comparing the minutiae of each fingerprint in a data base of fingerprints with selected ones of...
4752966 Fingerprint identification system  
An automatic fingerprint enrollment and identification technique is provided for automatically processing an input image represented by pixels having either a one or zero value. The automatic...
4696046 Matcher  
A set of Search identification points derived from an optical scan of a finger are compared against File identification points for the same finger. A multiple comparator divides the finger image...
4685145 Conversion of an image represented by a field of pixels in a gray scale to a field of pixels in binary scale  
A gray scale image of a fingerprint composed of a field of pixels is converted to a binary image composed of a field of pixels by a technique which takes into account the directivity of the ridge...
4646352 Method and device for matching fingerprints with precise minutia pairs selected from coarse pairs  
A pair candidate list (73) is formed by selecting minutia pairs with reference to a minutia list (71) showing original position and direction data given for minutiae by principal coordinate systems...
4525859 Pattern recognition system  
A pattern recognition system which detects line bifurcations and line endings, denoted minutiae, in a pattern of lines such as are found in a fingerprint is disclosed. In one embodiment, an image...
4310827 Device for extracting a density as one of pattern features for each feature point of a streaked pattern  
In addition to positions and directions of feature points of a streaked pattern, such as minutiae of a fingerprint on a background, a plurality of novel counts and a density are automatically...
4227805 Finger identification apparatus and method  
A slit beam of coherent light is scanned across a flat finger print or fingerpress to provide a modulated reflected light beam. A Fourier transform of the modulated light beam is projected onto a...
4210899 Fingerprint-based access control and identification apparatus  
A system including electronic, mechanical and optical mechanisms which enable the system to: "read" a human fingerprint directly from a human finger; convert the ridge-valley pattern of that...
4208651 Fingerprint identification by ridge angle and minutiae recognition  
A raster scanning laser beam and cooperating light detector generate a stream of binary coded data, which data are processed to yield an organized binary pattern of ridge angle data. Location of...
4185270 Fingerprint identification method and apparatus  
A process and apparatus for encoding the ridge endings and bifurcations of an inquiry fingerprint and for automatically searching through a file of similarly encoded fingerprints for the...
4151512 Automatic pattern processing system  
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...
4135147 Minutiae pattern matcher  
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...
4128850 Method and apparatus for transmitting facsimiles over telephone lines  
The quality of and/or transmission speed for fingerprint facsimiles transmitted over telephone lines are improved by image enhancement prior to transmission. Image enhancement is achieved by using...
4083035 Binary image minutiae detector  
An apparatus is described for detecting minutiae in a two-dimensional binary image. In a preferred embodiment a two-dimensional binary data bit stream of an image is enhanced in an enhancement...
4047154 Operator interactive pattern processing system  
An operator interactive pattern processing system is described which combines high speed recognition and processing abilities of an automatic portion with the estimating and recognition abilities...
4015240 Pattern recognition apparatus  
A pattern recognition apparatus for recognizing or identifying fingerprint images and the like is described. The apparatus enables the determination of the coordinates and angular positions of...
3959884 Method of classifying fingerprints  
A method for identifying fingerprints is disclosed; the method produces a descriptor code which is uniquely related to a given fingerprint impression. A fingerprint pattern is transformed into an...
3893080 Minutiae recognition system  
A system for detecting bifurcations and ridge endings (minutiae) in a fingerprint or on similar patterns in which two lines merge into one. The print is optically scanned, converted into electrical...
3699519 FINGERPRINT ANALYSIS DEVICE  
A fingerprint is observed, a small portion at a time, using a flying spot scanner, whose spot travels along a predetermined path at each position to provide an electrical analog signal indicative...
3611290 FINGERPRINT MINUTIAE READING DEVICE  
A fingerprint is observed, a small portion at a time, using a flying spot scanner, whose spot travels along a predetermined path at each position to provide an electrical analog signal indicative...
3582889 DEVICE FOR IDENTIFYING A FINGERPRINT PATTERN  
A cliche bearing a fingerprint is scanned by a flying spot moving along a network of successive horizontal lines by an industrial television camera. The display signal obtained, corresponding to a...
3564266 PHOTOELECTRIC FINGERPRINT RIDGE COUNTER  
Counting of ridges between the central core and the delta of a fingerprint as an identification aid is accomplished by moving a photodetector between a pair of selected points across a...
3537070 APPARATUS FOR PATTERN RECOGNITION  
3482498 RIDGE PATTERN RECORDING APPARATUS  
3419287 Fingerprint classification by coordinate system  
6496594 Method and apparatus for aligning and comparing images of the face and body from different imagers  
Matches 201 - 250 out of 250 < 1 2 3 4 5