Senga Advisors, LLC

Samsung Electronics Co., Ltd.

Seong-Won Cho

Jae-Sun Park

Hong-Gyu Kim

Sung-Taek Kwon

The Present invention relates to a method of recognizing the human iris corresponding to a field of a biometric technology, and more particularly to a method of recognizing human iris using Daubechies wavelet transform, wherein the dimensions of characteristic vectors are reduced by extracting iris features from inputted iris image signals through the Daubechies wavelet transform, binary characteristic vectors are generated by applying quantiztion functions to the extracted characteristic values so that utility of human iris recognition can be improved since storage capacity arid processing time thereof can be improved since storage capacity characteristic vectors, and a measurement process suitable for the low capacity characteristic vectors is employed when measuring vectors and previously registered characteristic vectors.

Daubechies wavelet transform of iris image data for use with iris recognition system

The present invention relates to an iris recognition method which is one of biometric technologies. According to a non-contact-type human iris recognition method by correction of a rotated iris image of the present invention, the iris image is acquired by image acquisition equipment using an infrared illuminator. Inner and outer boundaries of the iris are detected by analyzing differences in pixels of a Canny edge detector and the image for the inputted iris image, so as to allow the boundaries of the iris to be more accurately detected from the eye image of a user. Thus, the iris image with a variety of deformation can be processed into a correct iris image, so that there is an advantage in that a false acceptance rate and a false rejection rate can be markedly reduce.

Iris image data processing for use with iris recognition system

A receiver with suppressed intermodulation distortion for a radio communication terminal. In the receiver, a low noise amplifier for amplifying a received signal, has an operating power being increased in response to a first control signal to reduce an intermodulation distortion signal. An RF bandpass filter bandpass-filters the signals in a reception frequency band out of the signals output from the low noise amplifier. A mixer mixes an output of the RF bandpass filter with a local oscillation signal to generate an intermediate frequency signal by down-converting the output of the RF bandpass filter. An intermediate frequency amplifier for amplifying the intermediate frequency signal output from the mixer, and having an operating power being increased to reduce the intermodulation distortion signal in response to a second control signal. An intermediate frequency bandpass filter bandpass-filters an intermediate frequency signal out of the signals output from the intermediate frequency amplifier. A demodulator and signal processor demodulates and processes the intermediate frequency signal output from the intermediate frequency bandpass filter to generate an received signal strength indicator signal and a signal-to-noise ratio signal. A controller having a reference received signal strength indicator signal and a reference signal-to-noise ratio signal stored therein, compares the received signal strength indicator signal and the signal-to-noise ratio signal with the reference received signal strength indicator signal and the reference signal-to-noise ratio signal to determine whether a reception sensitivity is poor, and activates said first and second control signals if the reception sensitivity is poor. And one or more attenuators are provided to be controlled by the controller in response to the further comparisons made between the generated signal-to-noise ratio signal and the reference signal-to-noise ratio signal.

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Seoul, South Korea

Seong-Won Cho