Detection of Facial Feature Regionsby Manipulation of DCT’s Coefficients

이부형(Lee, Boo-Hyung),류장렬(Ryu, Jang-Ryeol) 한국산학기술학회 2007 한국산학기술학회논문지 Vol.8 No.2

본 논문에서는 DCT계수의 특성을 이용하여 조명조건이나 얼굴의 크기에 무관하게 얼굴특정영역을 검출하기 위한 새로운 방법을 제안한다. 일반적으로 영상을 DCT변환하면 영상의 에너지가 저주파영역에 집중되는 특성을 가지나 얼굴 특정요소들은 얼굴영상에서 비교적 고주파 성분들을 포함하고 있기 때문에 저주파에 해당되는 DCT계수들의 일부를 제거한 후 역변환을 취하면 얼굴특징영역이 강조된 영상을 얻을 수 있다. 따라서, 본 논문에서는 DCT변환된 영상으로부터 저주파 계수의 일부를 제거하여 얼굴특징요소 후보들을 추출한 후 템플릿을 적용하여 얼굴특정요소 영역을 결정한다. 얼굴특정요소 영역이 결정되면 얼굴특정요소 추출 알고리즘을 적용하여 눈, 코, 업을 구별한다. 제안된 알고리즘을 MIT의CBCL DB와 Yale facedatabase B 에 적용하여 실험하였다. 실험결과 DCT변환된 영상에서 저주파 일부의 계수를 제거한 후 얼굴 특정영역을 검출했을 경우 그렇지 않은 영상보다 영상의 크기와 조명조건의 변화에 무관하게 인식성능이 향상됨을 알 수 있었다. This paper proposes a new approach for the detection of facial feature regions using the characteristic of DCT(discrete cosine transformation) thatconcentrates the energy of an image into lower frequency coefficients. Since the facial features are pertained to relatively high frequency in a face image, the inverse DCT after removing the DCT’s coefficients corresponding to the lower frequencies generates the image where the facial feature regions are emphasized. Thus the facial regions can be easily segmentedfrom the inversed image using any differential operator. In the segmented region, facial features can be found using face template The proposedalgorithm has been tested with the image MIT’s CBCL DB and the Yale facedatabase B. The experimental results have shown superior performance under the variations of image size and lighting condition.

우편용 RFID 응용 모델

이부형(Lee, Boo-Hyung),박정현(Park, Jeong-Hyun) 한국산학기술학회 2007 한국산학기술학회논문지 Vol.8 No.3

본 논문에서는 우편 물류 환경에서 실시간 소포 처리 및 파렛 관리를 위한 RFID 적용 모델과 시스템 구조를 제시하였다 또한 제시한 RFID 응용 모델과 시스템 구조에 기반하여 RFID 기술을 우정 물류 현장 도입에 앞서 사전에 문제점을 파악하여 그 해결 방안을 모색하고 시행착오를 줄이기 위해 우편 물류용 RFID 응용 시스템 Testbed를 구축했고, 구축한 우편용 RFID 용용 시스템을 이용해 매체별 RFID 태그 인식 성능에 대한 시험 결과를 보였다. 실험에서 종이와 알미늄호일에 대한 인식성능이 물과 캔에 대한 인식성능보다 높음을 알 수 있었다. In this paper, we suggest postal RFID adaptation model and system architecture which can be used for real time trace and track of parcel processing and pallet management. This paper also shows postal RFID application system testbed based on the proposed postal RFID application model and architecture, and shows recognition performance of tag on parcel and pallet by speed and mounting tag material such as thin cans, water bottles, and paper using implemented postal RFID system to find the best solution for RFID adaptation in postal logistics environment. In the experiment, we can know recognition performance of paper and aluminium foil is better than water bottles and thin cans.

특정필드의 자동문자인식 및파일링 시스템

이부형(Boo-hyung Lee),류장렬(Jang-ryeol Ryu) 한국정보기술학회 2007 한국정보기술학회논문지 Vol.5 No.1

In this paper, the automatic character recognition and filing interface to specific field was implemeted. The system have function that can save automatically recognized charecters in the DB file after automatic recognizing characters of specific field selected by mouse dragging. The proposed interface is divided the automatic character recognition part and filing part for saving recognized characters. The system was designed to be operated by menu selection method and if specific menu is selected, each corresponding output is appeared in one output window of 6 windows.

AHP 기법을 이용한 정보시스템 감리 표준점검 항목의 선택 및 관리방법에 관한 연구

이부형(Boo-Hyung Lee) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.4

South Korea have introduced and managed IS audit system for stable development and efficient operation of the information system since 2006. IS auditing is accomplished by IS auditor against standard checklists given by government. However, satisfaction to audit quality are extremely low and there is widespread discontent to audit effectiveness. To improve level of audit quality, it is essential to introduce the selection method of specific standard checklists and intensive management system of selected checklists. To do this, audit standard checklists should be analyzed and then prioritized. In this paper, relative weights among audit standard checklists were obtained by applying Analytic Hierarchy Process(AHP) that is decision making technique and priority according to the weights was decided. The results will give a logical validity for specific checklist selection among audit checklists and help to improve audit quality as a result.

해시 트리 기반의 경량화된 DTLS 메시지 인증

이부형(Boo-Hyung Lee),이성범(Sung-Bum Lee),문지연(Ji-Yeon Moon),이종혁(Jong-Hyouk Lee) 한국통신학회 2015 韓國通信學會論文誌 Vol.40 No.10

웹서비스와 무선센서를 이용한 공용 기기 관리시스템의 구현

이부형(Boo-Hyung Lee) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.1

In this paper, common equipment management system which can identify and then use remotely many information from common equipment having wireless sensor under web environment is proposed. The proposed system consist of a management control module, scheduling server and web server. The management control module is a kind of sensor and installed on individually numerous electrical equipment. ID and control information of the electrical equipment are transferred to web server through wireless interface. The scheduling server performs a role to count and provide scheduling information based on information from each management control module. The management control module was implemented using atmega 328 based arduino board and scheduling server controls information of common electrical equipment through web interface in web server. Because the proposed system has a function that user can identify remotely many control and management information of common equipment by web service, the system will offer convenience to many consumer who are waiting to use the equipment.

원저(原著) : 인혈청내의 S.L.E와 관련된 anti-n-DNA의 정성, 반정량검사를 위한 Latex Agglutination Slide Test에 관하여

이부형 ( Boo Hyung Lee ),박인환 ( In Whan Park ) 대한임상병리사협회 1994 임상혈액검사학회 발표자료집 Vol.1 No.1

새로운 도트형 프린트 워터마크 패턴의 생성 및 부호화 기법

이부형(Lee, Boo-Hyung) 한국산학기술학회 2009 한국산학기술학회논문지 Vol.10 No.5

본 논문에서는 2차원 인쇄물의 고유정보 즉, 텍스트, 도형 및 기호 등에 대응하는 음성,영상 및 기타정보를 출력시킬 수 있도록 하기 위한 새로운 방법의 도트형 프린트 워터마크 생성 방법 및 부호화 기법을 제안히였다. 프린트 워터마크는 인쇄물의 고유정보에 대응하여 고유정보위에 다시 인쇄되는 특정마크로서 고유정보의 특성을 훼손하지 않으면서 음성, 또는 영상정보와 연결시키는 중간 매개 역할을 힌다. 제안한 도트형 프린트 워터마크 패턴은 0.4mm²의 면적 내에 16x16의 행렬구조를 가지며, 256개의 원소(element) 중 23개의 위치에 도트가 인쇄된다. 인쇄되는 도트의 크기는 0.02mm 로 매우 작아 가시화 되지 않는다. 23개의 위치는 2진수 비트 위치와 매핑 되어 800만개 정도의 인쇄물 고유정보를 표현할 수 있으며, 도트가 인쇄되는 위치에 따라 쉽게 2진수로 부호화할 수 있다는 특징을 갖는다. 또한 실험을 통해 제안한 프린트 워터마크 패턴이 자체 제작된 인식장치에 의해 쉽게 인식됨을 보였다. In this paper, the technique for production and encoding of new dot-type print watermark is proposed. The print watermark has characteristics similar to those of the digital watermark and function as link which change various first informations(texts, symbols, figures, etc) on the printed matter to secondary contents(sound, video, character, etc)corresponding each to informations on the printed matter. The proposed dot-type print watermark pattern is represented as 16x 16 matrix in 0.4mm² area and dots are printed on only 23 elements of 16x16 matrix. The size of each dot is so small( 0.02mm)that it can not be seen. Because position of printed dots correspond to the position of each digit in binary notation in this paper, they are encoded easily and there are about 8,000,000 watermark patterns enough to express first information of printed matters. It was showed that the proposed print watermark patterns are recognized without difficulty by the own recognition device.

창조경제 활성화를 위한 이공계 ICT 여성인력 양성추진 정책

이부형,송은지,Lee, Boo-Hyung,Song, Eun-Jee 한국정보통신학회 2014 한국정보통신학회지 Vol.15 No.1

휴대단말 카메라를 이용한 아두이노 기반 졸음예방시스템

이부형(Boo-Hyung Lee) 한국정보기술학회 2015 한국정보기술학회논문지 Vol.13 No.2

In this paper, Arduino based Sleepiness Prevention System Using a Smart-phone camera was implemented. The proposed system consists of the recognition part, control part and alarm part. In the recognition part, face images from Smartphone application programmed by this paper took. In the recognition part, following actions are accomplished: First, contour character values from initial face image and continuous face image of user are extracted. Second, these values are compared and then if values from continuous face image are moved compared to initial values, control value for tracking image is transmitted to the control part, if not, control value to sleepiness decision is transmittedt. In the control part, camera is moved or alarm is transmitted according to received control values. The proposed system was programmed by openCV in the recognition part and C-based Arduino sketch. Also, the reconition part and control part are communicating by bluetooth method. The proposed system accomplished actions according to predefined algorithm correctively and then showed reasonalble operation result.