Abstract:
PURPOSE: A high speed shadow removal method by using normal correlation and accumulation image is provided to reduce time for calculating normal correlation by using an accumulation image and a square image. CONSTITUTION: An inputted current image and a background image are converted into an inputted current square image and a background square image. The shadow removal begins by acquiring a multiplexing image(200). The accumulation image is obtained(210). NCC is obtained by using a mathematical formula(220). A pixel unit test is performed by using a preset reference value(230).
Abstract:
PURPOSE: A tag, a RFID system including the tag and an image data coding method are provided to improve data transmission performance of the tag by encoding image data through source coding or channel coding. CONSTITUTION: A source encoder(11) executes source encoding about image data transmitted from an external input device. A modulator(13) modulates the source encoded data. A channel encoder(12) executes channel encoding about the source encoded data using a convolutional code. The source encoder generates the source encoded data from the image data using run length coding.
Abstract:
PURPOSE: A reader, an presuming system about the number of tags and a method including the reader are provided to maximize transmitting efficiency between the reader and tag by presuming the number of tags accurately. CONSTITUTION: An impact determination unit(21) determines a tag collision of slots. The impact determination unit transmits data about the slot which acquires a tag ID successfully among the slots to a tag estimator(23). A frequency domain analysis unit(22) analyzes frequency domain of a plurality of answer signals received in the slot which the collision is generated. The tag estimating unit presumes the number of tags received in the slot which the collision is generated based on the analyzing result. A plurality of response signals has a wave and tag ID having different frequencies.
Abstract:
PURPOSE: A reader improving signal transmission performance, a signal transmission method between an RFID(Radio Frequency IDentification) system including the same and a reader and a tag are provided to maximize the signal-noise ratio of the received signal. CONSTITUTION: A reader(10) comprises a plurality of antennas. The reader comprises the signal processing unit and a controller. The signal processing unit processes each response signal received in a plurality of antenna. The controller controls a plurality of antennae based on data processed in the signal processing unit. A tag(20) communicates with the reader. The tag comprises a plurality of antennae.
Abstract:
PURPOSE: A client terminal device, a performance enjoying service device, a performance enjoying service system and a method thereof through wire/wireless communication network are provided to enjoy performance online without directly visiting a performance place by generating performance data according to the information. CONSTITUTION: A communication module unit(106) performs a performance enjoying service device. A digital signal processor(108) displays performance enjoying service related information. The digital signal processor reproduces performance enjoying data according to each service package. A controller(104) sets up the impression service information through the received performance information. The controller controls performance enjoying service data.
Abstract:
PURPOSE: A target terminal and cooperation communication method of a cooperation terminal is provided to improve the quality of reception data by using cooperation between terminals in cell environment. CONSTITUTION: A target terminal requests cooperation to one or more neighbor terminals(410). The target terminal acquires information for transmission power requested by information for a cooperation method(420). The target terminal selects a cooperation terminal from one or more neighbor terminals based on the transmission power(430). The target terminal cooperatively communicate with the cooperation terminal according to a cooperation method(440).
Abstract:
본 발명은 비디오 분석 기법들 중의 하나인 화면에 존재하는 객체들을 탐지하는 방법에 관한 것으로서, 배경영상(B)을 각 픽셀값을 제곱한 값을 픽셀값으로 가지는 영상(B 2 )으로, 현재영상(I)을 각 픽셀값을 제곱한 값을 픽셀값으로 가지는 영상(I 2 )으로, 또한 입력영상(I)과 배경영상(B)의 픽셀값을 각각 곱한 값을 픽셀값으로 가지는 영상(BI)을 입력된 배경영상(B)과 입력영상(I)를 통해 각각 구하는 변환단계, 구해진 배경제곱영상(B 2 )과 현재 제곱 영상(I 2 ) 및 배경-현재 영상(BI)의 누적영상을 구하는 누적영상 도출단계, 구해진 누적영상 값을 이용해 정규 상관도(NCC)를 구하는 정규상관도 도출단계 및 기 설정된 문턱값을 기준으로 화소 단위 테스트를 수행하여 물체와 그림자를 구별하는 결과 도출단계를 포함하여 정규 상관도와 누적 영상을 이용하여 고속으로 그림자를 비디오 화면에서 제거할 수 있다. 정규 상관도(NCC), 누적 영상, 그림자 제거
Abstract:
리더 및 이를 포함하는 무선 주파수 인식 시스템, 및 리더와 태그간 신호 전송 방법이 개시된다. 본 발명의 실시예에 따른 무선 주파수 인식 시스템은, 태그와 리더에 미모 알고리즘을 적용시켜 수신 신호의 신호대잡음비를 최대화하고 가장 성능이 좋은 전송 경로를 선택하여 신호를 전송함으로써 신호의 전송 성능을 향상시킬 수 있다. 따라서, 무선 주파수 인식 시스템의 통신 거리가 확장될 수 있고, 대용량의 데이터 전송이 가능해진다.