摘要:
A computer readable medium embodying a program to be executed by a terminal device used for a biometric authentication, the program including: an image generation code generating an enrolled image and a verification image from biometric information of a user collected at a sensor coupled to the terminal device; a filter generation code generating a random filter for scrambling the enrolled image and an inverse filter of the random filter; a transformation code transforming the enrolled image to a registration template by applying the random filter to the enrolled image and transforming the verification image to a filtered verification image by applying the inverse filter to the verification image; communication code transmitting the registration template and the filtered verification image to a biometric server thereby the biometric server performs biometric authentication of the user based on the cross-correlation between the registration template and the filtered verification image.
摘要:
A printing apparatus includes a head which discharges color inks and into which clear ink that prevents the head from being clogged and white ink are selectively filled. A selection portion communicates either of a white or a clear ink container with the head. A controller executes a first switching from a second filled state where the head is filled with clear ink to a first filled state where the head is filled with white ink by shifting from a state where the clear ink container is communicated with the head to a state where the white ink container is communicated with the head. A second switching is executed from the first filled state to the second filled state by shifting from a state where the white ink container is communicated with the head to a state where the clear ink container is communicated with the head.
摘要:
At a registration time, a feature data array for registration is generated from biometric information acquired by a client, and a position correction template and a comparison template obtained by converting the feature data array for registration are registered in a server.At an authentication time, a feature data array for authentication is generated from biometric information acquired by the client, and converted feature data for position correction obtained by converting the feature data array for authentication is transmitted to the server. The server detects a position correction amount of the feature data array for authentication relative to the feature data array for registration using the position correction template and the converted feature data for position correction, and transmits the position correction amount to the client. The client corrects the feature data array for authentication using the position correction amount and transmits the converted feature data array for comparison to the server. The server calculates a distance between the comparison template and the converted feature data array for comparison and determines success or failure of the authentication on the basis of the distance.
摘要:
In a biometrics authentication system inputting biometric information and outputting a user ID, speedup of 1:N matching on the side of server achieved when cancelable biometrics authentication is realized in which matching is carried out. During registration, similarity of a feature to a dummy feature is searched and the feature is transformed by using a transform parameter corresponding to a nearest neighboring dummy feature. The transformed feature and a group ID are transmitted to the server and the server registers the transformed feature at the group in a DB. During authentication, like the registration process, similarity search of a feature is carried out and the feature is transformed by using transform parameter corresponding to a nearest neighboring dummy feature. The transformed feature and group ID are transmitted to the server. The server executes 1:1 matching between a template a the group in the DB and the transformed feature.
摘要:
In a discharge lamp, at least one of two main electrodes disposed at both ends of the discharge lamp includes one main electrode that comprises a sintered metal member having a slope with respect to another main electrode. A tip of the slope is positioned within a space covered by a trigger electrode coated on an outer surface of the discharge lamp in a limited area with respect to the entire circumference of a bulb of the lamp. This structure allows the discharge lamp to emit light at a stable level constantly. An electronic flash device using this discharge lamp can emit the light precisely.
摘要:
An electric flash apparatus of the present invention is actuated to emit light by application of a trigger signal issues by a trigger circuit (5) after a power transistor (4), such as, an I.G.B.T. (insulated gate bipolar transistor) connected in series with a flash tube (3), is certainly turned to sufficient ON state.
摘要:
In an electronic flash device of the type in which depending upon the exposure conditions an electronic flash lamp converts into light the energy stored on a main flash capacitor or the energies stored not only on the main flash capacitor but also on an auxiliary flash capacitor, a switching element which is turned on or off so as to permit or interrupt the discharge of the auxiliary flash capacitor is controlled by a simplified control circuit comprising a switching element control circuit which delivers a low voltage supplied from a low-voltage power source to the switching element as a turn-on signal and a detection circuit which controls the switching element control circuit in response to the exposure conditions such as a distance to a subject or a selected aperture. Therefore, an inversion circuit which is used in the prior art electronic flash devices can be eliminated.
摘要:
The present invention captures user's biometric data during enrollment and converts it by a given conversion parameter to create a template. It creates verification information for the conversion parameter, and enrolls it in an authentication server together with the template. The conversion parameter is stored in an IC card or the like for issuance to the user. During authentication, the authentication server verifies that the authentication terminal knows the conversion parameter, using conversion parameter verification information. Next, the authentication terminal converts user's biometric data newly captured by a conversion parameter to create matching information, and transmits it to the authentication server. The authentication server matches the matching information with the template to determine whether the user is a principal.
摘要:
In a biometrics authentication system inputting biometric information and outputting a user ID, speedup of 1:N matching on the side of server is achieved when cancelable biometrics authentication is realized in which matching is carried out. During registration, similarity of a feature to a dummy feature is searched and the feature is transformed by using a transform parameter corresponding to a nearest neighboring dummy feature. The transformed feature and a group ID are transmitted to the server and the server registers the transformed feature at the group in a DB. During authentication, like the registration process, similarity search of a feature is carried out and the feature is transformed by using transform parameter corresponding to a nearest neighboring dummy feature. The transformed feature and group ID are transmitted to the server. The server executes 1:1 matching between a template a the group in the DB and the transformed feature.
摘要:
A pulverization/classification apparatus including a cylindrical vessel having an inner wall, on a surface of which a layer including a release agent is located; a pulverizer configured to pulverize a material such as toner raw materials in the cylindrical vessel using a compressed air to prepare a particulate material; and a classifier configured to classify the particulate toner material to prepare a powder of the material. Alternatively, the inner wall of the cylindrical vessel has a circumferentially projected portion. A method for manufacturing a powder such as toners using the pulverization/classification apparatus is also provided.