Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Masahiro Wakamori

Takeo Azuma

Kenji Kondo

Takeshi Fujimatsu

Masahiro Iwasaki

Takeshi Yukitake

Toshiaki Shinohara

Kengo Tsuzuki

Kuriacose Joseph

Morio Sugita

Joel W Zdepski

A plurality of iris images are acquired (SA), 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 (SA). Features are generated from the respective iris images that belong to the aggregation (SA), and a predetermined number of registration features are selected from the features, using authentication performance as an evaluation index.

Techniques and apparatus for increasing accuracy of iris authentication by utilizing a plurality of iris images having different pupil diameter/iris diameter ratios

A plurality of iris codes are registered for each registrant in an iris database () 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 () as an item to be collated before authentication.

Personal authentication method for certificating individual iris

Image data of an image including an eye is input (S), and band limitation is performed (S). Then, a predetermined feature such as moment is extracted from the band-limited image data (S), 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 (S).

Artificial eye distinguishing method and device, artificial eye distinguishing program, iris recognition method, false printed matter distinguishing method, and image distinguishing method

Techniques and apparatus for increasing accuracy of iris authentication by utilizing a plurality of iris images

In iris authentication, iris regions are extracted from a plurality of images (). The extracted iris regions are subjected to polar coordinate transformation () and band limitation (). Thereafter, an iris code is generated from the coordinate-transformed, band-limited iris regions (). The iris code is subjected to rotational compensation (). 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 ().

Iris encoding method, individual authentication method, iris code registration device, iris authentication device, and iris authentication program

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.

Eye image imaging device

A plurality of images that include the same eye is input (S) and iris regions are extracted therefrom to obtain iris images (S). After the plural iris images are subjected to transformation from a rectangular coordinate system to a polar coordinate system (S) and rotational compensation (S), the images are added together while a weight is attached to a pixel value in each coordinate of the polar coordinate system, to accumulate them as a single iris image (S). An iris code is generated from the thus obtained single iris image (S, S).

Iris code generation method, individual authentication method, iris code entry device, individual authentication device, and individual certification program

Pupil candidate detection unit for detecting positions of pupil candidates in an eye image; and luminance difference calculation unit for obtaining a difference between a maximum value and a minimum value of an image data of an eye image on a circumference of a circle having a center at center coordinates of a pupil candidate and a predetermined radius are provided, and when the output of luminance difference calculation unit is larger than the predetermined threshold, the corresponding pupil candidate is determined not to be the pupil.

Pupil detection device and iris authentication apparatus

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.

Eye image taking device

According to the present invention, when an image data currently being received is switched over to the data from another image information device, the best picture quality is provided without stopping the image up to the next I frame even when the switching request is given at the middle of I frame. The apparatus of the invention comprises a clock processing unitfor generating a current time corrected according to an information of a time received from a system controllervia a network, a transmitting/receiving processing unitfor transmitting and receiving data and control signal to and from the network, a time designation processing unitfor setting the designation time received from the system controller via the network, and a designation time detection processing unitfor comparing the preset designation time with the current time, and when the designation time agrees with the current time, the received data is switched over, and the switching is synchronized with the next I frame.

Apparatus controller, device and method for controlling data transmission of digital apparatus, and data transmission control system

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.

Growing community of inventors

Kanagawa, Japan

Masahiro Wakamori