Abstract: A fingerprint authentication device comprises input finger characteristic judging portion 13. The input finger characteristic judging portion 13 judges whether the input data is proper or not on the basis of spatial distribution of brightness in an fingerprint image represented by the input data. An observation line deciding portion decides an observation line on the fingerprint image. A peak envelope calculating portion graphs the brightness against positions on the observation line and draws envelopes of line graphs each of which links local maximums or local minimums of the brightness. A discriminative value calculating portion calculates discriminative values by the use of a brightness distribution function and peak envelop functions. A deciding portion decides whether the input image is proper or not by the use of the discriminative values together with the discriminative coefficient preliminary calculated.

Abstract: A fingerprint authentication device comprises input finger characteristic judging portion 13. The input finger characteristic judging portion 13 judges whether the input data is proper or not on the basis of spatial frequency analysis of an fingerprint image represented by the input data. An observation area deciding portion decides an observation area on the fingerprint image. A frequency analyzing portion 132 transforms image of the observation area into a Fourier transformed image. The frequency analyzing portion 132 further calculates averages and dispersion of strength values corresponding to predetermined spatial frequency bands. A discriminative value calculating portion calculates discriminative values by the use of the averages and the dispersion. A deciding portion decides whether the input image is proper or not by the use of the discriminative values together with discriminative coefficient preliminary calculated.

Abstract: A source program conversion tool 511 substitutes for an initialization part of constant data to be included in a source code S1 an initialization part of alternative constant data converted to be in a situation in which decryption is difficult by a reversible conversion process, and generates a source code S2 having a source of an inversion process for restoring original constant data from said alternative constant data inserted into a location before said constant data to which a reference is made.

Abstract: By means of a program producing apparatus 201, a self-restoration type program is produced, wherein inversion processing that operates before at least said converted part is executed during execution in a user computer 221 so that the contents of said converted part are inverted into original contents is incorporated into a main program in which, by means of reversible conversion processing, at least one part is converted into a difficult state to be deciphered, and this is stored in an object storage section 222 of the user computer 221. When the self-restoration type program is started-up, said converted part is restored by itself on a main memory 223, and a desired operation of the said program is made possible.

Abstract: A method and device for fingerprint identification implementing precise identification at a high speed by using partial images of a fingerprint obtained through relative movements of a finger to a small sized sensor are provided.

Abstract: A user authentication method of making determination of identity of a user based on an image of a part of a body of a user as biometrics captured by a sensor, including searching, with respect to feature information extracted from a single image of a part of a body captured by the sensor and a frame as a series of images of the part of the body captured by the sensor, a corresponding point between a preceding frame and a current frame to conduct user authentication based on a sweep pattern as a series of moving vectors obtained by calculating a moving vector of relative movement of a finger.

Abstract: An original image is held in the image holder 11, and displayed on the image display 12 to be viewed by the operator. The operator inputs the angle of rotation and ratio of compression of an focal point of the original image for observing ridges more clearly. A perspective transforming unit 14 generates a result image according to corresponding perspective transformation (i.e., affine transformations), and a perspective transformed image display 15 displays the result image to the user. The operator does operations of manual plotting and manual tracing with reference to the result image. The result of the operations is inputted to and recorded in the manual input unit 16, and transformed in a feature data transforming unit 17 to feature data.

Abstract: In an identification system for electronic commerce, an end terminal transmits a transaction request message containing biometrics data of a user to a communications network, At least one electronic commerce service provider unit is provided which receives the transaction request message via the network and transmits an authentication request message containing the biometrics data to the network. An authentication server having a database for storing registered biometrics data receives the authentication request message and determines whether the received biometrics data has corresponding biometrics data in the database and returns a reply to the ECSP unit via the network indicating that the transaction request message is authenticated if the received biometrics data coincides with one of the registered biometrics data of the database.

Abstract: A user terminal including a fingerprint sensor is connected via a network to a content distribution server. The server includes at least a fingerprint-feature comparing unit and a specified content distributor. The fingerprint-feature comparing unit accesses a registered user information table in which personal information regarding a user, a user identification, and fingerprint feature information, and reads therefrom fingerprint feature information of a person who requests a content distribution so as to compare the fingerprint feature information with fingerprint feature information of the person inputted from the user terminal. The specific content distributor distributes a requested content to the user terminal only when match is made as a result of comparison. The content can therefore be distributed via a network with higher reliability and safety.

Abstract: A technology, in which when an article, ordered by a person through a network being not meeting each other, is delivered to the person, the article can be surely delivered to the person who made the order by not allowing that another person pretends to be the person who made the order, and it can be verified that the article was delivered to the person who made the order, is provided. When a person orders an article, the person inputs his/her own fingerprint to an ordering terminal in addition to inputting order information including the article number of the article, its destination (the delivering address of the article), the payment method, the price, and so on. And a fingerprint feature of the inputted fingerprint and the order information are transmitted to an electronic commerce (EC) server through a network.

Abstract: A biometric identification system ensuring reliable and protective identification of individuals even in a system having a biometric input device and a biometric verifier are separately provided is disclosed. The biometric data input device has a biometric data sensor and an encoder that encodes digital biometric data using secret information identifying the biometric data input device to transmit encoded data to the biometric verifier. The biometric verifier decodes the encoded data using the secret information to reproduce digital biometric data. The identity of the individual is verified when the digital biometric data is a registered biometric feature of an authorized user and the biometric data input device is an authorized device.

Abstract: The invention provides a fingerprint characteristic extraction apparatus wherein classification and preselection processing with an augmented degree of accuracy can be achieved without significantly increasing the processing time. The apparatus uses, in addition to characteristic amounts used in ordinary preselection processing, another characteristic amount obtained from a fingerprint image for the preselection processing. The apparatus includes a ridge extraction section for extracting ridges from an inputted fingerprint image, a singular point detection section for detecting singular points from the ridges, a main pattern discrimination section for discriminating a pattern of the inputted fingerprint image, and a singular point characteristic calculation section for detecting characteristic amounts between the singular points.

Abstract: To provide an apparatus for pre-selecting fingerprint cards having certain similarity to an S-card to be identified, at a high-speed, among a plurality of F-cards, an apparatus of the invention comprises: an F-side cluster index determination section (2) for designating a cluster wherein feature data of the plurality of F-cards are to be classified according to features extracted from the plurality of F-cards; an F-card feature storing section (3) for storing the feature data of the plurality of F-cards in the cluster designated by the F-side cluster index determination section (2); an S-card feature storing section (5) for temporarily storing feature data of the S-card; an S-side cluster index determination section (6) for designating clusters to be retrieved according to a combination of features extracted from the S-card; and a fingerprint card matching discrimination unit (8) for pre-selecting the fingerprint cards by comparing the feature data of the S-card with the feature data of the plurality of F-car

Abstract: 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 comprises a vertical strip divider (11) for dividing digitized data of a fingerprint into data of a plurality of strips with straight lines parallel to a y direction; a projection calculator (12) for obtaining histograms, each of said histograms calculated by accumulating pixel values of each of said plurality of strips in an x direction perpendicular to said y direction; a valley candidate calculator (13) for detecting candidate valleys from said histograms, one of said histograms having a locally minimum value at each of said candidate valleys; and a valley information integrator (116) for calculating a position of a joint line of said fingerprint from positional information of said candidate valleys detected by said valley candidate calculator (13).

Abstract: An information processing system has a plurality of instruction strings containing a plurality of instructions and progressing process by executing instructions in one of the instruction strings in order. The system executes instructions in the instruction string in order on the basis of a control token set a start address, per each instruction string. In execution of an instruction for loading data from external memory, a next instruction is fed to the arithmetic processing unit without waiting completion of load operation in execution of the instruction for loading data from the external memory, and the currently executed instruction string is interrupted with storing a control token including a resume address of the interrupted instruction string in the token storing memory when data is not loaded in the data register in execution of the instruction for performing arithmetic operation with respect to the data in the data register.