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오윤희,강현호,박지환,Oh, Yun-Hui,Kang, Hyun-Ho,Park, Ji-Hwan 한국정보처리학회 2001 정보처리학회논문지 C : 정보통신,정보보안 Vol.8 No.6
In this paper, we consider a multiple watermarking for image copyright protection. Multiple watermarking can be defined that two or more watermarks are inserted into the same content. Multiple watermarking using spread spectrum technique is able to extract the correct watermarks from the watermarked content when the orthogonality among keys should be guaranteed only. To keep the orthogonal property between keys, we perform the process of Gram-Schmidt on the random sequences. The orthogonalized sequences are used as keys to embed the watermarks. The proposed method can not only extract correctly the embedded watermarks but also show the robustness against various attacks such as Gaussian noise addition, histogram equalization, gamma correlation, sharpening and brightness/contrast adjustment. 본 논문에서는 영상의 저작권 보호를 위하여 하나의 컨텐츠에 복수개의 서로 다른 워터마크를 삽입하는 다중 워터마킹(multiple watermarking)에 대하여 고찰한다. 대역확산(spread spectrum)을 이용한 다중 워터마킹에서 워터마크 삽입시 사용되는 키 사이의 직교성(orthogonality)이 유지되어야 삽입된 워터마크의 정확한 추출이 가능하게 된다. 랜덤계열 사이의 직교성을 유지하기 위하여 Gram-schmidt 직교화를 이용하여 워터마크를 삽입하는 방식을 제안한다. 제안 방식은 삽입된 워터마크를 정확하게 추출할 수 있을 뿐 아니라, 가우시안 노이즈 추가, 히스토그램 평활화, 감마 보정, 샤프닝, 명도/대비조정 등의 다양한 공격에 대하여 강인함을 보인다.
오윤희(OH Yunhee),Oka Noriko(岡 典子),조원일(Cho Won Il) 한국장애학회 2018 한국장애학 Vol.3 No.1
본 연구는 현재 한국의 자립생활이념의 원류를 이해하기 위한 일환으로, 한국에서 장애인자립생활센터를 개시하는 데 큰 영향을 끼친 일본 〈휴먼케어협회〉의 설립 경위를 탐색하고, 자립생활이념이 형성되어가는 과정과 자립생활의 실체에 대해 역사적 연구법을 사용하여 분석하고 있다. 연구결과는 다음과 같다. 첫째, 자립(생활)의 개념은 시기별ㆍ인물별로 차이가 있었다. 둘째, 각 시기별로 자립(생활)의 개념은 단일 개념이 아닌, 복합적 개념으로 혼용되었다. 셋째, 용어 사용의 시점과 용어가 갖는 이념의 침투 시점은 동일하지 않다. 마지막으로, 시기별로 일관되게 나타나는 주요 개념은 욕구의 인식과 해결을 위한 주체성의 강조라고 할 수 있다. The purpose of this study is to explore the establishment of the Japanese Human Care Association which had a great influence on the initiation of the Independent Living Center for the Disabled in Korea as part of understanding the origin of Korea’s independence philosophy. Based on the historical study, the process of how independent living philosophy was formed, as well as how it is defined were analyzed. The results of the study are as follows. First, the concept of independence (independent living) was different by period and individual. Second, the concept of independence (independent living) was defined with complexity rather than a single concept. Third, the period at which a term is used does not coincide with establishment of the terminology. Finally, a central concept emerges across different time period as an emphasis on subjectivity for recognition and resolution of needs.
오윤희(Younhee Oh) 대한노인정신의학회 2006 노인정신의학 Vol.10 No.2
This paper reviews the Cognitive-Behavioral Treatment (CBT) of late-life anxiety disorders, mainly focused on generalized anxiety disorder. CBT for late-life anxiety disorder is usually based on the same programs with demonstrated efficacy in younger adults, with specific treatment components included relaxation training, cognitive restructuring, and exposure. CBT for late-life anxiety disorders was proved to be more effective than no treatment. But, the existing body of work does not clearly indicate the superiority of CBT over alternative psychosocial interventions. Another serious limitation of CBT is that the rates of attrition in many trials are higher among older adults than among younger adults. Those limitations are strongly suggested that augmented CBT to meet the late-life adult’s characteristics and needs, like as execute function, should be developed. Enhanced CBT is the one of the example, it includes the standard CBT elements, as well as additional attention to at-home practice assignments, reminder telephone call and weekly reviews of concepts and techniques. In conclusion, this review suggested the potential value of CBT for late-life anxiety disorders. Based on the current literature, nonstandard and augmented therapies appear to produce best results.