BLIND WATERMARKING ADAPTIF PADA CITRA DIGITAL BERDASARKAN NOISE VISIBILITY FUNCTION DALAM DOMAIN DWT-DCT

Daniel Setiadikarunia, Dian Eriani Surbakti

Abstract


Digital watermarking adalah salah satu teknologi yang digunakan untuk melindungi hak cipta suatu media digital seperti citra, audio dan video. Dalam artikel ini dibahas mengenai teknik blind watermarking adaptif pada citra digital dalam domain DWT-DCT. Watermark disisipkan pada koefisien DCT sub-band LH hasil DWT level 1 citra host. Level penyisipan watermark secara adaptif disesuaikan dengan nilai NVF (Noise Visibility Function) koefisien DWT sub-band LH. Untuk daerah yang bertekstur watermark akan disisipkan lebih kuat daripada daerah yang datar. Dari hasil uji coba dengan Sd = 3, St = 5 dan ⍺ = 5 diperoleh kualitas citra ber-watermark mempunyai rata-rata nilai PSNR > 30 dB, dan nilai BCR 99%-100%. Watermark masih tahan terhadap kompresi JPEG dengan faktor kualitas Q = 3, penambahan noise Gaussian sampai 10% dan uniform sampai 15%, cropping sampai 25%, dan scaling 50%, tetapi tidak tahan terhadap rotasi.


Full Text:

PDF

References


I. J. Cox, M. L. Miller, J. A. Bloom, J. Fridrich, and T. Kalker, Digital Watermarking and Steganography, Morgan Kaufmann, 2008.

C. Chan, and L. Cheng, “Hiding data in images by simple LSB substitution”, Pattern Recognition, 37(3):469-474, 2004.

M. El-Gayyar and J. von zur Gathen, “Watermarking techniques spatialdomain,” University of Bonn Germany, Tech. Rep., 2006.

M. Barni, F. Bartolini, V. Cappellini, A. Piya, “A DCT domain system for robust image watermarking”, IEEETransactions on Signal Processing, 66(3), 1998.

S. Lin, and C. Chin, “A Robust DCT-based watermarking for copyright protection”, IEEE Trans. Consumer Electronics, 46(3): 415-421, 2000.

P. Tao, and A.M. Eskicioglu, “A robust multiple watermarking scheme in the discrete wavelet transform domain”, in Symposium on Internet Multimedia Management Systems, Philadelphia, PA. October 25-28, 2004.

A. Reddy and B. Chatterji, “A new wavelet based logowatermarking scheme”, Pattern Recognition Letters, 26(7): 1019- 1027, 2005.

V. Potdar, S. Han and E. Chang, “A Survey of Digital Image Watermarking Techniques”, in Proc. of the IEEE International Conference on Industrial Informatics, pp. 709-716, Perth, Australia 2005.

S.K. Amirgholipour, A.R. Naghsh-Nilchi, “Robust Digital Image Watermarking Based on Joint DWT-DCT”, Proceedings of International Journal of Digital Content Technology and its Applications, vol. 3, num. 2, June 2009.

J.R. Hernandez, M. Amado, and F.P. Gonzalez, “DCT-Domain Watermarking Techniques for Still Images: Detector Performance Analysis and a New Structure”, in IEEE Trans. Image Processing, vol. 9, pp 55-68, Jan. 2000.

A. Al-Haj, “Combined DWT-DCT Digital Image Watermarking” Journal of Computer Science, 3(9):740-746, 2007.

L.P. Feng, L.B. Zheng, P. Cao, “A DWT-DCT Based Blind Watermarking Algorithm for Copyright Protection”, Proceeding of 3rd IEEE International Conference on Computer Science and Information Technology (ICCSIT), pp. 455-458, 2010.

C.P. Chuang, C.H. Liu, Y.T. Liao, H.W. Chi, “A Robust Digital Watermarking with Mixed Transform Technique for Digital Image”, Proceedings of the International MultiConference of Engineers and Computer Scientists, March 2012.

S. Voloshynovskiy, A. Herrigel, N. Baumgaertner and T. Pun, “A Stochastic Approach to Content Adaptive Digital Image Watermarking”, Proceedings of the Third International Workshop on Information Hiding, pp.211-236, Sep. 1999.

S. Voloshynovskiy, S. Pereira, V. Iquise, and T. Pun, “Attack modelling: Towards a second generation benchmark”, Signal Processing, vol. 81(6), pp. 1177-1214, 2001.

S. Pereira, S. Voloshynovskiy, and T. Pun, “Optimal transform domain watermark embedding via linear programming”, Signal Processing, Special Issue: Information Theoretic Issues in Digital Watermarking, 2001.


Refbacks

  • There are currently no refbacks.