Nec Corporation

Nippon Electric Co., Ltd.

Yoshitomi Pharmaceutical Industries, Ltd.

Taito Company, Ltd.

Welfide Corporation

Yukio Hoshino

Leiming Su

Yukio Itakura

Tetsuro Fujita

Hirotsugu Komatsu

Toshio Miyazaki

Kenji Chiba

Shigeo Sasaki

Yoshihide Takahashi

Kunitomo Adachi

Minoru Moriwaki

Michio Terasawa

Koji Teshima

Masafumi Arita

Ko Asai

Tokushi Hanano

Mitsuharu Sano

Takeshi Ikumoto

Isamu Suzuki

Seiichi Hiratsuka

Hideo Tsuiki

Takeki Okumoto

Tatsuo Shibuya

Yoshiyuki Aoki

Tetsuo Miura

Chiba Kenji

Yoshitaka Fukumasu

Ritsuko Omori

Kazuo Kiji

Mariko Nagasawa

Hidekazu Aratani

Junichi Kunikata

Interlace noises of the image of an iris included in the image of an eye picked up through an interlaced scheme are corrected precisely within a short time. An image processing apparatus () corrects a digital image P based on only low-brightness pixels configuring the image of a pupil included in the digital image P of an eye. Accordingly, interlace noises included in the image of the pupil of the eye and that of the iris can be corrected precisely within a short time. Next, a checking apparatus () performs authentication on a subject person based on the image of the iris specified based on the corrected digital image P. Hence, precise authentication is enabled.

Image processing apparatus, biometric authentication apparatus, image processing method and recording medium

An image of the iris contained in an image of an eye is accurately specified. An image of the iris contained in a digital image (P) of an eye is accurately specified. In view of low-intensity pixels of the digital image (P) of the eye, and high-intensity pixels having a predetermined relationship with the low-intensity pixels, a reference pixel (PX) that defines the center of the pupil is determined. Thereby, the center of the pupil can be specified more accurately when compared to the case where, for example, it is determined only from the low-intensity pixels. Therefore, the accuracy of the process to specify the iris image on the basis of the reference pixel is improved, and as a result, the iris image can be accurately specified.

Image processing device, biometric authentication device, image processing method, and recording medium

A plurality of pieces of information related to the iris pattern of an eye can be checked against each other in a short time. Characteristic curves (S()-S()), which are in accordance with eight ring areas (A-A) formed by dividing an image of an iris, are generated. The polarities of the gradients of these characteristic curves are then arranged, thereby generating codes (-) to be checked. Each of these codes (-) to be checked consists of a ternary combination of +, &#x2212; and zero, whereby the amount of data to be handled during the checking process can be reduced. As a result, checking the codes to be checked can be performed in a short time.

Biometric authentication apparatus, biometric authentication method and recording medium

A region of an iris image where eyelash and other part images are mixed is identified with accuracy. The noise region of an iris image contained in a digital eye image (P) where, for example, eyelash and eyelid parts are mixed is identified with accuracy based on characteristic curves obtained by scanning the iris image with arcs (AR) and (AR). Then, authentication is performed using data created based on the iris image from which the noise region is excluded. In this way, the subject can be authenticated with accuracy without being affected by noise.

The present invention relates to a compound of the general formula

2-aminopropane-1,3-diol compounds, medicinal use thereof, and intermediates in synthesizing the same

To provide a stripe pattern matching system enabling to verify minutia correspondence between a searching stripe pattern and a filed stripe pattern independent of position or direction of the searching stripe pattern, correspondence value between them is evaluated by comparing their distances, directions or relations to their each neighboring minutiae by a pairing examination means (16). The most appropriate rotation angle and the most appropriate shifting coordinates for adjusting the searching stripe pattern to the filed stripe pattern is obtained by selecting a most appropriate axial candidate giving the most concentrated coordinate deviations referring to deviation distributions of correspondence values accumulated on a deviation plane memory (18) by applying each axial candidate as the coordinate adjustment reference. Therefore, the most appropriate coordinate adjustment can be performed even when either or both of absolute direction and position cannot be specified, in the invention.

Stripe pattern matching system

Immunosuppressive drug

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 false minutiae from the fingerprint image displayed on an output device to leave only real minutiae and to formulate a minutia list which registers a location of each minutia, a minutia direction, and minutia relations representative of adjacent minutia pairs. Edition of the minutiae may be carried out by handling the minutiae as an image while correction may be made by recognizing the minutiae as data. Ridge numbers between two adjacent ones of the minutiae are included in the minutia relations and may be manually or automatically extracted from the fingerprint image.

Fingerprint image processing system capable of simply processing minutiae

3,4-dihydrothieno[2,3-d]pyrimidine compounds and their pharmaceutical use

There are disclosed 2-aminopentanoic acid compounds represented by the formula ##STR1## wherein R is as defined in the specification, their optical isomers, their pharmacologically acceptable salts and their use as an immunosuppressant.

2-aminopentanoic acid compounds and their use as immunosuppressants

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 personnel in order to determine if the individual is included among the authorized personnel. The streaked pattern is compared with the fingerprint patterns stored in memory on the basis of characteristics between a reference point of a fingerprint and its relationship to other selected points of the fingerprint.

Identification system employing verification of fingerprints

A letter segmenting apparatus for the optical character recognition is disclosed. In response to a binary pattern of signals for a letter group, a proportioning circuit predicts possible locations of dividing lines between the letters. A binary signal processor processes the binary pattern to find correct dividing lines near the predicted locations. When this processor fails to find a correct dividing line, a multi-level signal processor finds the correct dividing line near the predicted location.

Letter segmenting apparatus for OCR comprising multi-level segmentor

A character recognizing system for recognizing an input pattern of a character by comparing with a plurality of standard patterns is disclosed. The standard patterns are classified into a plurality of groups, and each group has a common standard pattern and a plurality of non-common standard patterns. The non-common standard patterns represent differences between the standard patterns and the common standard pattern. An input pattern read out by scanning a printed character is first compared with the common standard pattern of any group. When the difference between the input pattern and the common standard pattern is less than a predetermined value, the input pattern is compared with the non-common standard patterns in the same group.

Character recognizing system for machine-printed characters

A word recognition apparatus using a dictionary of words is disclosed. The apparatus comprises, first of all, word storing means which stores words based on the classification of a plurality of words to be retrieved in block units. The words are stored in the order of block numbers so that characters placed in one or more given positions of a word forming an input character string may be used as a retrieving key. A block-starting-address storing means is provided for storing starting addresses of the clock units in the word storing means. A block-starting-address and limit-address taking-out means takes out a block starting address corresponding to a designated block number and a block limit address corresponding to a block number next to the designated number from the blockstarting-address storing means. An input-character-string storing means stores the string of characters recognized by a character recognition system. A block-number determining means responsive to the input-character-string storing means sequentially designates the number of blocks containing words having recognized characters of characters placed in the retrieving key positions of the input character string. A word taking-out means sequentially takes out words stored in the addresses beginning with the block starting address of the word storing means and ending with an address short of the block limit address by using the starting address and the block limit address which are taken out from the block-starting address storing means with the block number used as the retrieving key. Finally, a word comparing means is provided for detecting a word similar to the input character string to a degree over a given value by the comparison of the words thus taken out with the input character string.

Word recognition apparatus

Growing community of inventors

Tokyo, Japan

Yukio Hoshino