公开(公告)号：US06208849B1

公开(公告)日：2001-03-27

申请号：US09100953

申请日：1998-06-22

申请人： Seong-Won Cho ,  Jae-Sun Park ,  Hong-Gyu Kim ,  Sung-Taek Kwon

发明人： Seong-Won Cho ,  Jae-Sun Park ,  Hong-Gyu Kim ,  Sung-Taek Kwon

IPC分类号： H04B110

CPC分类号： H04B1/109

摘要： 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.

公开(公告)号：US07302087B2

公开(公告)日：2007-11-27

申请号：US10656885

申请日：2003-09-05

申请人： Seong-Won Cho

发明人： Seong-Won Cho

IPC分类号： G06K9/00

CPC分类号： G06K9/00597

摘要： 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.

摘要翻译： 本发明涉及一种识别对应于生物特征技术领域的人体虹膜的方法，更具体地说，涉及一种使用Daubechies小波变换识别人体虹膜的方法，其中通过从输入的光束中提取虹膜特征来减小特征矢量的尺寸 通过Daubechies小波变换的虹膜图像信号，通过对所提取的特征值应用量化函数来生成二进制特征向量，从而可以提高人眼虹膜识别的效用，因为存储容量和处理时间可以由存储容量特性向量和 当测量向量和先前登记的特征向量时，采用适用于低容量特征向量的测量过程。

公开(公告)号：US20080159600A1

公开(公告)日：2008-07-03

申请号：US11933752

申请日：2007-11-01

申请人： Seong-Won Cho

发明人： Seong-Won Cho

IPC分类号： G06K9/00

CPC分类号： G06K9/00597

摘要： Disclosed is 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, 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 reduced.

摘要翻译： 公开了一种虹膜识别方法，它是生物识别技术之一。 根据通过校正旋转的虹膜图像的非接触型人体虹膜识别方法，通过使用红外照明器的图像采集设备获取虹膜图像。 通过分析Canny边缘检测器和输入的虹膜图像的图像的像差来检测虹膜的内部和外部边界，以便允许从用户的眼睛图像更准确地检测虹膜的边界。 因此，具有各种变形的虹膜图像可以被处理成正确的虹膜图像，因此具有可以显着降低错误接受率和错误拒绝率的优点。

公开(公告)号：US07298874B2

公开(公告)日：2007-11-20

申请号：US10656921

申请日：2003-09-05

申请人： Seong-Won Cho

发明人： Seong-Won Cho

IPC分类号： G06K9/00

CPC分类号： G06K9/00597

摘要： 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.

摘要翻译： 本发明涉及作为生物识别技术之一的虹膜识别方法。 根据通过校正本发明的旋转虹膜图像的非接触式人虹膜识别方法，通过使用红外照明器的图像采集设备获取虹膜图像。 通过分析Canny边缘检测器和输入的虹膜图像的图像的像差来检测虹膜的内部和外部边界，以便允许从用户的眼睛图像更准确地检测虹膜的边界。 因此，具有各种变形的虹膜图像可以被处理成正确的虹膜图像，因此具有可以显着降低错误接受率和错误拒绝率的优点。