Abstract: In a tuner unit, a metal shielding plate standing upright on a circuit board is provided between circuit blocks formed on the circuit board so as to electrically shield the circuit blocks from each other. A metal bridge that connects the shielding plate and a frame is provided between some circuit blocks and at a distance from the circuit board so that an electrical component can be mounted on a portion of the circuit board opposing the bridge. This makes it possible to reduce the mounting space for the electrical component and to achieve a small tuner unit.

Abstract: The authentication system is hard against fraudulent acts even if the authenticator or the system of retail store is forged, resulting in the system with a high security. The system includes: an authenticator having an authentication processor to authenticate whether the user is registered previously, and a data output part to send an identification data of the user when the user is authenticated to be registered previously; and a server having a data input part to input data of the user, a credit appraiser to appraise the user according to the identification data, and an appraisal result output part to output the credit appraisal result.

Abstract: Image data of an image including an eye is input (S1), and band limitation is performed (S2). Then, a predetermined feature such as moment is extracted from the band-limited image data (S3), and recognition as to whether the eye projected in the image is a counterfeit eye or a living eye is performed based on the extracted feature (S4).

Abstract: An eye image taking device comprises: an imaging unit for taking the eye of a person to be authenticated, as an eye image; an illumination unit for illuminating the eye of the person to be authenticated; an eyeglass reflection detecting unit for detecting an eyeglass reflection from the eye image; and an instruction unit for instructing the person to be authenticated the movement of the imaging unit or the direction of the face of the person to be authenticated, in case an eyeglass reflection detecting portion detects the eyeglass reflection.

Abstract: An eye image taking device comprises: an imaging unit for taking an eye of a user as an eye image; a focusing degree calculating unit for calculating the magnitude of high-frequency components from the eye image; a threshold setting unit for setting a focusing threshold intrinsic to an authorized user; and a focus deciding unit for deciding a focus by comparing the magnitude of the high-frequency components and the focusing threshold, so that the optimum focusing threshold is set for the authorized user.

Abstract: A plurality of iris images are acquired (SA0), and aggregation of iris images of which distribution of pupil openings is uniform is acquired from the plurality of iris images by duplication and/or deletion (SA1). Features are generated from the respective iris images that belong to the aggregation (SA2), and a predetermined number of registration features are selected from the features, using authentication performance as an evaluation index.

Abstract: A plurality of iris codes are registered for each registrant in an iris database (12) together with pupil diameter-iris diameter ratio R. At the time of authentication, an iris code is obtained from a captured iris image by feature extraction while pupil diameter-iris diameter ratio R is obtained. Ratio R obtained at the time of registration and ratio R obtained at the time of authentication are compared to specify an appropriate iris code from the iris database (12) as an item to be collated before authentication.

Abstract: In iris authentication, iris regions are extracted from a plurality of images (2a, 2b). The extracted iris regions are subjected to polar coordinate transformation (3a, 3b) and band limitation (4a, 4b). Thereafter, an iris code is generated from the coordinate-transformed, band-limited iris regions (5a, 5b). The iris code is subjected to rotational compensation (6a, 6b). A plurality of resultant iris codes are synthesized into a single iris code by determining the bit value of each bit based on a majority rule (7a, 7b).

Abstract: In a tuner unit, a metal shielding plate standing upright on a circuit board is provided between circuit blocks formed on the circuit board so as to electrically shield the circuit blocks from each other. A metal bridge that connects the shielding plate and a frame is provided between some circuit blocks and at a distance from the circuit board so that an electrical component can be mounted on a portion of the circuit board opposing the bridge. This makes it possible to reduce the mounting space for the electrical component and to achieve a small tuner unit.

Abstract: A shielding structure for a resonant circuit according to the present invention includes a grounding conductor which surrounds the periphery of the resonant circuit and which has conductive tab portions which oppose each other across a cut portion, the conductive tab portions being connected to each other by a connecting conductor which is placed on a pair of first conductive pattern elements so as to intersect the pair of first conductive pattern elements. The resonant circuit is shielded by a closed shielding unit constructed of the grounding conductor and the connecting conductor, so that the radiation from the grounding conductor is reduced.

Abstract: A moving-image signal encoding apparatus includes a transmission buffer memory. A first quantization step size for a normal block other than a refreshed block is determined on the basis of an occupied capacity of the buffer memory. A second quantization step size for the refreshed block is determined on the basis of the first quantization step size. A refreshment instruction signal is generated. One of the first quantization step size and the second quantization step size is selected in response to the refreshment instruction signal.

Abstract: A moving-image signal encoding apparatus includes a transmission buffer memory. A first quantization step size for a normal block other than a refreshed block is determined on the basis of an occupied capacity of the buffer memory. A second quantization step size for the refreshed block is determined on the basis of the first quantization step size. A refreshment instruction signal is generated. One of the first quantization step size and the second quantization step size is selected in response to the refreshment instruction signal.