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A ROBUST VIDEO WATERMARKING BASED ON DWT FRAMEWORK AGAINST TRANSCODING
Teak-Young Seong,Seon-Ja Lim,Chong-Ho Woo,Jong-Keuk Lee,Suk-Hwan Lee,Ki-Ryong Kwon 한국멀티미디어학회 2007 한국멀티미디어학회 국제학술대회 Vol.2007 No.-
Recently, transcoding of the video contents in the environments of heterogeneous multimedia services-wired/wireless Internet and mobile networks using cellular phones, DMB(Digital Multimedia Broadcasting), IPTV(Internet Protocol Television) etc. - is raised up as a new issue. Therefore, video watermarking techniques are confronted with difficulty about not only existing video compression but also a modification considering time and spatial resolution under transmission bandwidth. In this paper, for the transcoding, we proposed a new video watermarking scheme based on DWT framework using multiresolution property of DWT and binary image watermark playing a role of synchronization pattern. In the experimental results, we confirmed robustness and invisibility of the proposed scheme about transcoding.
DCT and Homomorphic Encryption based Watermarking Scheme in Buyer-seller Watermarking Protocol
Seong, Teak-Young,Kwon, Ki-Chang,Lee, Suk-Hwan,Moon, Kwang-Seok,Kwon, Ki-Ryong Korea Multimedia Society 2014 멀티미디어학회논문지 Vol.17 No.12
Buyer-seller watermarking protocol is defined as the practice of imperceptible altering a digital content to embed a message using watermarking in the encryption domain. This protocol is acknowledged as one kind of copyright protection techniques in electronic commerce. Buyer-seller watermarking protocol is fundamentally based on public-key cryptosystem that is operating using the algebraic property of an integer. However, in general usage, digital contents which are handled in watermarking scheme mostly exist as real numbers in frequency domain through DCT, DFT, DWT, etc. Therefore, in order to use the watermarking scheme in a cryptographic protocol, digital contents that exist as real number must be transformed into integer type through preprocessing beforehand. In this paper, we presented a new watermarking scheme in an encrypted domain in an image that is based on the block-DCT framework and homomorphic encryption method for buyer-seller watermarking protocol. We applied integral-processing in order to modify the decimal layer. And we designed a direction-adaptive watermarking scheme by analyzing distribution property of the frequency coefficients in a block using JND threshold. From the experimental results, the proposed scheme was confirmed to have a good robustness and invisibility.
3차원 그래픽 모델의 기본 구성 성분들을 고려한 3차원 CAD 도면 워터마킹
성택영(Teak-Young Seong),임순연(Soun-Youn Lim),이석환(Suk-Hwan Lee),권기룡(Ki-Ryong Kwon) 한국멀티미디어학회 2006 한국멀티미디어학회 학술발표논문집 Vol.2006 No.1
본 논문에서는 3차원 설계도면의 세가지 기본 성분인 Line, ARC, 그리고 3DFACE성분을 이용하여 3차원 설계도면의 저작권 보호를 위한 워터마킹 기법을 제안한다. 워터마크는 Line의 길이 정보, ARC의 각도 정보, 그리고 3DFACE의 서로 마주보는 두 선분의 길이의 비율 정보 내에 삽입된다. 워터마크를 삽입할 성분은 설계도면의 배포 순서나 소유권자 혹은 저작권자의 선택을 통해 결정된다. 실험결과를 통해, 삽입된 워터마크의 비가시성 및 여러 기하학적 공격과 파일 포맷 변환 공격에 대한 강인성이 우수함을 확인하였다.
DEVELOPMENT OF REAL-TIME SERVICE INFORMATION SYSTEM USING RFID MIDDLE WARE BASED ON 3-TIER STRUCTURE
Young-Ung Jo,Teak-Young Seong,Hye-Jung Chang,Ji-Sun Yoon,Suk-Hwan Lee,Ki-Ryong Kwon 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-
This paper presents the development of real-time SIS (Service Information System) using RFID middleware based on 3-tier structure. The proposed algorithm recognizes all information in middleware about the product attached RFID tag through the PDA or computer and executes the filtering for data and the integrating of hardware. These processes are to reconstruct to the significant data and information and to transfer them to Web. After mapping the transferred RFID tag information into the product serial numbers that are stored in SIS, the information of services such as the product or the parts, the manual and users claim can be inquired or processed for users. Furthermore, F-cost can be decreased by analyzing and improving the information for contributing business sales.
A Watermarking Scheme for Mobile 3D Game Contents Based on Buyer-Seller Watermarking Protocol
Seong-Geun Kwon,Suk-Hwan Lee,Eung-Ju Lee,Ki-Ryong Kwon,Teak-Young Seong,Sung-Ho Bae 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
This paper presents a watermarking method for copyright protection and illegal copy prevention of mobile 3D contents. The proposed method embeds copyright information and user's phone number into spatial domain and encryption domain of mobile animation data based on Buyer-Seller watermarking protocol. Furthermore, we insert user's operation key so that only authorized user can play 3D animation game in mobile device.
권성근(Seong-Geun Kwon),성택영(Teak-Young Seong),권기룡(Ki-Ryong Kwon),이재승,이석환(Suk-Hwan Lee) 한국멀티미디어학회 2007 한국멀티미디어학회 학술발표논문집 Vol.2007 No.1
3D 키프레임 애니메이션은 여려 개의 변환 노드들로 구성되어 있으며, 각 변환 노드에는 초기 모델의 기하학 노드와 운동 정보를 나타내는 여려 개의 보간기 노드들로 이루어져 있다. 본 논문에서는 방향 보간기를 이용한 3D 키프레임 애니메이션 워터마킹을 제안하였다. 제안한 방법에서는 방향 보간기 노드를 가지는 임의의 변환 노드를 선택한 후, 일정한 단위의 키 타임 이 되도록 쿼터니언 성분들을 재배열한다. 그리고 각 키 타임 동안의 회전 방향이 큰 쿼터니언 성분에 워터마크를 삽입한다. 실험 결과로부터 제안한 방법이 기하학적 공격 및 타임라인 공격에 대하여 우수한 강인성을 가지며, 주관적 및 객관적 화질 측면에서 우수한 비가시성을 가짐을 확인하였다.