• Title/Summary/Keyword: copyright paper

Search Result 572, Processing Time 0.024 seconds

An Adaptive Watermarking Scheme for Three-Dimensional Mesh Models (3차원 메쉬 모델의 적응형 워터마킹 방법)

  • 전정희;호요성
    • Journal of the Institute of Electronics Engineers of Korea SP
    • /
    • v.40 no.6
    • /
    • pp.41-50
    • /
    • 2003
  • For copyright protection of digital contents, we employ watermarking techniques to embed watermark signals into digital host data. In this paper we propose an adaptive watermarking algorithm for three-dimensional (3-D) mesh models. Watermark signals are inserted into vertex coordinates adaptively according to changes of their position values. While we embed strong watermarks in the areas of large variations, watermarks are weakly inserted in other areas. After we generate triangle strips by traversing the 3-D model and convert the Cartesian coordinates to the spherical coordinate system, we calculate variations of vertex positions along the traversed strips. Then, we insert watermark signals into the vertex coordinates adaptively according to the calculated variations. We demonstrate that imperceptibility of the inserted watermark is significantly improved and show the bit error rate (BER) for robustness.

Digital Image Watermarking using Subband Correlation Wavelet Domain (웨이블릿 영역의 부대역 상관도를 이용한 디지털 영상 워터마킹)

  • 서영호;박진영;김동욱
    • Journal of the Institute of Electronics Engineers of Korea SP
    • /
    • v.40 no.6
    • /
    • pp.51-60
    • /
    • 2003
  • The watermarking is the technique that embeds or extracts the certain data without the change of the original data for the copyright protection of the multimedia contents. Watermark-embedded contents must not be distinguished by human's eye and must be robust to the various image processing and the intentional distortions. In this paper, we propose a new watermarking technique applied in the wavelet domain which has both the spatial and frequency information of a image. For both the robustness and the invisibility, the positions for embedding the watermark is selected with the multi-threshold. We search the similarity between highly correlated coefficients in the each subband and decide the mark space after verifying the significance in the specified subband. The similarity is represented by the coefficient difference between the subbands and its distribution is used in the watermark embedding and extracting. The embedded watermark can be extracted without the original image using the relationship of the subbands. By these properties the proposed watermarking algorithm has the invisibility and the robustness to the attacks such as JPEG compression and the general image processing.

A Study on the Roles of Academic Libraries for Open Access Journal Publishing: Focusing on the Academic Libraries Participated in COPE (오픈액세스 학술지 출판에서 대학도서관의 역할에 대한 고찰 - COPE 참가 대학도서관을 중심으로 -)

  • Joung, Kyoung-Hee
    • Journal of the Korean BIBLIA Society for library and Information Science
    • /
    • v.23 no.4
    • /
    • pp.45-69
    • /
    • 2012
  • This paper examined the roles of academic libraries in open access journal publishing in terms of monetary supports for publication. As a result, many academic libraries have participated in the cooperative programs such as COPE(Compact for Open-Access Publishing Equity) and $SCOAP^3$(The Sponsoring Consortium for Open Access Publishing in Particle Physics) for authors to publish their research in open access journals. Also, 13 academic libraries in North America have set up the campus-based open access author funds individually. Most of academic libraries in participating COPE did not fund for research that have been published in the hybrid open access journals. In addition to publication funds, academic libraries provided authors or scholarly societies with such services as copyright negotiation, technological supports of the publication process, and the dissemination of open access publications.

A Robust DNA Watermarking in Lifting Based 1D DWT Domain (Lifting 기반 1D DWT 영역 상의 강인한 DNA 워터마킹)

  • Lee, Suk-Hwan;Kwon, Ki-Ryong;Kwon, Seong-Geun
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.49 no.10
    • /
    • pp.91-101
    • /
    • 2012
  • DNA watermarking have been interested for both the security of private genetic information or huge DNA storage information and the copyright protection of GMO. Multimedia watermarking has been mainly designed on the basis of frequency domain, such as DCT, DWT, FMT, and so on, for the robustness and invisibility. But a frequency domain watermarking for coding DNA sequence has a considerable constraint for embedding the watermark because transform and inverse transform must be performed without completely changing the amino acid sequence. This paper presents a coding sequence watermarking on lifting based DWT domain and brings up the availability of frequency domain watermarking for DNA sequence. From experimental results, we verified that the proposed scheme has the robustness to until a combination of 10% point mutations, 5% insertion and deletion mutations and also the amino preservation and the security.

A Study on Protection of Iris and fingerprint Data Based on Digital Watermarking in Mid-Frequency Band (중간 주파수 영역에서의 디지털 워터마킹 기법에 의한 홍채 및 지문 데이터 보호 연구)

  • Jeong, Dae-Sik;Park, Kang-Ryoung
    • Journal of Korea Multimedia Society
    • /
    • v.8 no.9
    • /
    • pp.1227-1238
    • /
    • 2005
  • Recently, with the advance of network and internet technologies, it is appeared the Problem that the digital contents such as image, voice and video are illegally pirated and distributed. To protect the copyright of the digital contents, the digital watermarking technology of inserting the provider's information into the contents has been widely used. In this paper, we propose the method of applying the digital watermarking into biometric information such as fingerprint and iris in order to prevent the problem caused by steal and misuse. For that, we propose the method of inserting watermark in frequency domain, compare the recognition performance before and aster watermark inserting. Also, we experiment the robustness of proposed method against blurring attack, which is conventionally taken on biometrics data. Experimental results show that our proposed method can be used for protecting iris and fingerprint data, efficiently.

  • PDF

A Method for Estimating Retransmission Fee for Terrestrial Broadcasting Channels between Terrestrial Television Systems and Cable TV System Operators (지상파방송과 케이블방송 간에 지상파채널 재송신 대가 산정방안)

  • Moon, Myung-Sok;Lee, Song-Hee;Choi, Seong-Jhin
    • Journal of Broadcast Engineering
    • /
    • v.21 no.5
    • /
    • pp.689-703
    • /
    • 2016
  • A dispute over price for retransmitting terrestrial channels between Terrestrial Television Systems and Cable TV System Operator(SO)s has been underway up to now since 2007 and expected to last unless there is a measure of extraordinary countermeasures. Thus, in this paper, we present a scheme for calculating the reasonable price on retransmitting terrestrial channels. Re-transmission price calculation scheme is presented in two ways. One is to calculate the price for the extent to which Terrestrial broadcasters and Cable broadcasters contribute, and the other is to calculate the price for terrestrial channels retransmitted by applying the method of Cable TV PP program fee basis. In addition, on profit-sharing scheme and criteria for program fee we present two ways of subscription, which are flat sum system and fixed rate system.

A Blind Watermarking Algorithm of 3D Mesh Model for Rapid Prototyping System Application (RP 시스템 적용을 위한 3차원 메쉬 모델의 블라인드 워터마킹)

  • Ji-Zhe, Cui
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.32 no.12C
    • /
    • pp.1194-1202
    • /
    • 2007
  • In this paper, we proposed a blind watermarking algorithm to apply to the rapid prototyping system. The 3D mesh model is used in the step of the CAD modeling before the making of the prototype system of the rapid prototyping system. STL type mesh modeling which is used in this system reduces the error of the system and improves the accuracy of the system. In the step of the CAD modeling, some transformations which do not change the model accuracy are used, but some transformations which change the model accuracy are not used because the mesh model error is related to the accuracy of the prototype system. Most watermarking algorithms embedded a specific random noise as the watermark information into the model. These kinds of the algorithms are not proper to the 3D model watermarking. The proposed algorithm can be used for the accurate prototyping system because it does not change the model after the watermark embedding This means it can be used for the copyright marking and the data integrity.

Threshold Selection Method for Capacity Optimization of the Digital Watermark Insertion (디지털 워터마크의 삽입용량 최적화를 위한 임계값 선택방법)

  • Lee, Kang-Seung;Park, Ki-Bum
    • Journal of the Institute of Convergence Signal Processing
    • /
    • v.10 no.1
    • /
    • pp.49-59
    • /
    • 2009
  • In this paper a watermarking algorithm is proposed to optimize the capacity of the digital watermark insertion in an experimental threshold using the characteristics of human visual system(HVS), adaptive scale factors, and weight functions based on discrete wavelet transform. After the original image is decomposed by a 3-level discrete wavelet transform, the watermarks for capacity optimization are inserted into all subbands except the baseband, by applying the important coefficients from the experimental threshold in the wavelet region. The adaptive scale factors and weight functions based on HVS are considered for the capacity optimization of the digital watermark insertion in order to enhance the robustness and invisibility. The watermarks are consisted of gaussian random sequences and detected by correlation. The experimental results showed that this algorithm can preserve a fine image quality against various attacks such as the JPEG lossy compression, noise addition, cropping, blurring, sharpening, linear and non-linear filtering, etc.

  • PDF

Video Copy Detection Algorithm Against Online Piracy of DTV Broadcast Program (DTV 방송프로그램의 온라인 불법전송 차단을 위한 비디오 복사본 검출 알고리즘)

  • Kim, Joo-Sub;Nam, Je-Ho
    • Journal of Broadcast Engineering
    • /
    • v.13 no.5
    • /
    • pp.662-676
    • /
    • 2008
  • This paper presents a video copy detection algorithm that blocks online transfer of illegally copied DTV broadcast programs. Particularly, the proposed algorithm establishes a set of keyframes by detecting abrupt changes of luminance, and then exploits the spatio-temporal features of keyframes. Comparing with the preregistered features stored in the database of DTV broadcast programs, the proposed scheme performs a function of video filtering in order to distinguish whether an uploaded video is illegally copied or not. Note that we analyze only a set of keyframes instead of an entire video frame. Thus, it is highly efficient to identify illegal copied video when we deal with a vast size of broadcast programs. Also, we confirm that the proposed technique is robust to a variety of video edit-effects that are often applied by online video redistribution, such as apsect-ratio change, logo insertion, caption insertion, visual quality degradation, and resolution change (downscaling). In addition, we perform a benchmark test in which the proposed scheme outperforms previous techniques.

A Wavelet Based Robust Logo Watermarking Algorithm for Digital Content Protection (디지털 콘텐트 보호를 위한 강인한 웨이블릿 기반 로고 워터마킹 알고리즘)

  • Kim, Tae-Jung;Hwang, Jae-Ho;Hong, Choong-Seon
    • Journal of Internet Computing and Services
    • /
    • v.9 no.1
    • /
    • pp.33-41
    • /
    • 2008
  • Due to the advantage of wavelet transform such as the compatibility with JPEG2000, multi-resolution decomposition, and application of HVS(Human Visual System), watermarking algorithm based on wavelet transform (DWT) is recently mast interesting research subject. However, mast of researches are focused on theoretical aspects for the robustness rather than practical usage, and. may be not suitable too much complicated to use in practice. In this paper, robust logo watermarking algorithm based on DWT is proposed for large and huge data processing. The proposed method embeds the logo watermark by mapping of $8{\times}8$ blocks in order of the number of '1' of the original image and the randomized watermark image with LFSR. The original image is transformed by 2 level wavelet. The experimental results shows that the watermark is embedded successfully, and the proposed algorithm has the valuable robustness from the image processing like JPEG compression, low pass filter, high pass filter and changes in brightness and contrast.

  • PDF