Patent application number | Description | Published |
20100192531 | FILTER MEDIUM FOR AIR FILTER AND AIR FILTER - An air filter comprising a filter pack comprising a folded nanofiber filter medium, fitted to a filter frame through a seal material, the nanofiber filter medium being a filter medium for an air filter, comprising a nanofiber filter medium which, when a filter medium face velocity is 5.3 cm/s, has a performance index of collecting target particle diameter of 0.3 μm, 0.040 (1/Pa) or more, performance index of collecting target particle diameter of 0.1 μm, 0.030 (1/Pa) or more, and performance index of collecting target particle diameter of 0.05 μm, 0.050 (1/Pa) or more. By this, a high air volume and low pressure drop type high-performance air filter using a nanofiber filter medium can be provided. | 08-05-2010 |
20110314782 | PLEATED AIR FILTER PACK AND AIR FILTER USING SAME - The invention provides a filter pack of which the mass is not increased, and moreover, the effective filter medium area is not reduced, and of which the pressure drop is sufficiently low, and the strength is sufficiently high, and an air filter using this. | 12-29-2011 |
20140165517 | FILTER MEDIUM FOR AIR FILTER, AIR FILTER UNIT, AND METHOD FOR PRODUCING FILTER MEDIUM FOR AIR FILTER - A filter medium for an air filter unit for collecting dust from an airflow includes a pre-collection layer, a principal collection layer and an air-permeable cover layer. The pre-collection layer collects a part of the dust in the air flow. The principal collection layer includes a porous polytetrafluoroethylene film. The principal collection layer is positioned on a downstream side of the air flow relative to the pre-collection layer to collect dust that passes through the pre-collection layer. The air-permeable cover layer is positioned as an outermost surface layer of the filter medium on an upstream side of the air flow to allow dust in the air flow to pass through. The air-permeable cover layer is configured to suppress deformation of a surface of the filter medium caused by pressing force from an outside. Preferably, an air filter unit includes the filter medium in a zigzag shape. | 06-19-2014 |
20150082757 | COMPOSITION HAVING PTFE AS MAIN COMPONENT, MIXED POWDER, MATERIAL FOR MOLDING, FILTERING MEDIUM FOR FILTER, AIR FILTER UNIT, AND A METHOD FOR MANUFACTURING A POROUS MEMBRANE - A composition, a mixed power and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing. | 03-26-2015 |
Patent application number | Description | Published |
20080240515 | METHOD OF ADJUSTING REFERENCE INFORMATION FOR BIOMETRIC AUTHENTICATION AND APPARATUS - According to an aspect of an embodiment, a method of adjusting reference information for biometric authentication, comprises storing the reference information including reference biometric data and threshold values corresponding to a plurality of users, respectively, obtaining biometric data of a user by inputting biometric information of the user, calculating a matching ratio of the biometric data with the reference biometric data of each of the users, respectively, comparing the matching ratio of each of the users with the threshold value of each of the users, respectively, determining which of the matching ratios exceed the corresponding threshold values and adjusting the threshold values which are exceeded by the corresponding matching ratios so that all the matching ratios but the highest matching ratio become lower than the adjusted threshold values, respectively. | 10-02-2008 |
20090232368 | AUTHENTICATION APPARATUS - An authentication apparatus is provided. A forgery determination threshold is determined on the basis of two types of parameters, a forgery similarity and a forgery difficulty. If a calculated value for an object under test is lower than or equal to the forgery determination threshold, then, it is determined that the object is a biologic object. Thus, easiness in impersonation with a fake of a biologic object that is easy to forge may be reduced, and a false rejection due to a determination in which a biologic object is erroneously determined as a fake may be reduced. | 09-17-2009 |
20090245596 | AUTHENTICATION APPARATUS AND AUTHENTICATION METHOD - The present invention relates to authentication information using bio information such as fingerprints. Identification accuracy whether a living body or a forgery (non living body) is improved to prevent an authentication error The present invention particularly relates to an authentication apparatus (a fingerprint authentication apparatus), an authentication method, an authentication program and a recording medium. By detecting characteristics not shown in a living body that a forgery (non-living body) has, the characteristic such as uniform reducing feature by the passage of time of a gummy finger (a false finger) made like a bio finger, whether a living body or a forgery is determined, a determination error of a living body by a forgery is prevented, and authentication accuracy of a living body is enhanced. | 10-01-2009 |
20100042850 | AUTHENTICATION METHOD AND APPARATUS - An authentication method for use in an apparatus having a function, a function to execute a first program that executes a predetermined process after first user authentication with biometrics authentication is performed and does not have a network connection function, and a function to execute a second program that is invoked after the first program is executed, executed after second user authentication and has a network connection function comprises executing the first program in forgery detection mode regardless of a result of a user determination if biometrics authentication with forgery is detected at the time of the first user authentication, invoking the second program in the forgery detection mode after the first program is executed in the forgery detection mode, and notifying a device connected to an external network of forgery detection information by using the network connection function after the second program is invoked in the forgery detection mode. | 02-18-2010 |
20100060417 | BIOMETRICS AUTHENTICATION DEVICE AND BIOMETRICS AUTHENTICATION METHOD - A biometrics authentication device includes a registered data retaining unit to retain registered data, a verification data retaining unit to retain a plurality of pieces of verification data used for verification with the registered data, and a registered data generation unit to extract feature information of high reproducibility from the verification data in the verification data retaining unit and the registered data in the registered data retaining unit and to generate new registered data from extracted feature information, wherein by the new registered data generated by the registered data generation unit, the registered data in the registered data retaining unit is updated. | 03-11-2010 |
20100061600 | Biometric authentication device, fake body judgment device, and biometric authentication method - A biometric authentication device includes a fake body judgment unit that judges whether a subject is a fake body by verifying whether a biometric information value that is input from the subject is within a biometric information value range that has been registered in advance; and a biometric information value range updating unit that, when the fake body judgment unit has judged that the subject is a living body, updates the biometric information value range such that a difference between the biometric information value that is input from the subject and an end of the biometric information value range becomes larger. | 03-11-2010 |
20100148922 | BIOMETRIC AUTHENTICATION DEVICE AND METHOD, COMPUTER-READABLE RECORDING MEDIUM RECORDED WITH BIOMETRIC AUTHENTICATION COMPUTER PROGRAM, AND COMPUTER SYSTEM - A computer system checks whether or not an authentication success rate for a registered user shows an over-time reduction based on the history of the results of the previous biometric authentication processes in which the high-speed verification process is executed, when the authentication success rate is determined as showing an over-time reduction for the registered user, the computer system instead executes a precise verification process for verifying input biometric information against registered biometric information to make verification with a higher precision than with the high-speed verification process. | 06-17-2010 |
20120011579 | BIOMETRIC AUTHENTICATION DEVICE, BIOMETRIC AUTHENTICATION METHOD AND STORAGE MEDIUM - A biometric authentication device includes: a biometric information obtain portion obtaining biometric information of a user; a biometric condition determine portion determining good and bad of biometric condition of the user according to the biometric information of the user; a biometric matching portion performing a matching of registered biometric information registered in advance based on the biometric information; an alternate authentication portion performing an authentication based on information that is different from the biometric information; and an alternate authentication control portion switching validation and invalidation of the authentication by the alternate authentication portion according to a determination result of the biometric condition determine portion. | 01-12-2012 |
20120013436 | BIOMETRIC AUTHENTICATION DEVICE, BIOMETRIC AUTHENTICATION METHOD AND STORAGE MEDIUM - A biometric authentication device including: a data-for-matching generation portion generating a data for matching from biometric information; an update-demand determine portion determining whether a registered data registered for matching with the data for matching needs updating or not, based on a difference between biometric quality of the registered data and biometric quality of the data for matching; and a registered data replace portion replacing the registered data by a generated data for updating, according to a determination result of the update-demand determine portion. | 01-19-2012 |
20130147972 | USER DETECTING APPARATUS, USER DETECTING METHOD AND COMPUTER-READABLE RECORDING MEDIUM STORING A USER DETECTING PROGRAM - A user detecting apparatus includes: a memory that stores a program including a procedure; and a processor that executed the program, the procedure including: obtaining an image captured by a camera, switching between a first mode in which a first user-associated area, which is associated with a user, is detected from the image according to a similarity between a color histogram of the image and a reference color histogram and a second mode in which a second user-associated area, which is associated with the user, is detected from the image according to a feature point extracted from the image, according to luminance of the image, and detecting, from the image, the first user-associated area in the first mode or the second user-associated area in the second mode. | 06-13-2013 |
20130148850 | USER DETECTING APPARATUS, USER DETECTING MEHTOD, AND COMPUTER-READABLE RECORDING MEDIUM STORING A USER DETECTING PROGRAM - A user detecting apparatus includes: a memory; and a processor that executes a procedure, the procedure including: obtaining a first image and a second image, extracting a user-associated area from the first image according to a given condition, dividing the user-associated area into a plurality of areas, storing a histogram of each of the plurality of areas in the memory, detecting from the second image a corresponding area that corresponds to an area that is one of the plurality of areas and has a first reference histogram according to similarity, and changing a reference histogram used for a third image from the first reference histogram to a second reference histogram. | 06-13-2013 |
20140292644 | IMAGE PROCESSING DEVICE AND METHOD - An image processing device includes a processor a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: detecting a first candidate group and a second candidate group contained in the image, the first candidate group being one or more candidates for a first part of a user, the second candidate group being one or more candidates for a second part of the user; and selecting at least one of the first part in the first candidate group and the second part in the second candidate group, on the basis of a human-body's positional relationship of the first part and the second part. | 10-02-2014 |
20150055836 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - An image processing device includes, a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, acquiring an image including a first region of a user; extracting a color feature quantity or an intensity gradient feature quantity from the image; detecting the first region based on the color feature quantity or the intensity gradient feature quantity; and selecting whether the detecting is detecting the first region using either the color feature quantity or the intensity gradient feature quantity, based on first information related to the speed of movement of the first region calculated from a comparison of the first regions in a plurality of images acquired at different times. | 02-26-2015 |
20150110364 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - An image processing device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: obtaining a first image in which a user is included, a second image which is imaged in an imaging condition different from that of the first image, a third image which is continuously imaged at a different point of time from that of the first image, and in the same imaging condition as that of the first image, and a fourth image which is continuously imaged at a different point of time from that of the second image, and in the same imaging condition as that of the second image; extracting a first feature amount of a user which is included in the first image, a second feature amount of the user which is included in the second image, a third feature amount. | 04-23-2015 |