عنوان مقاله [English]
Several methods are exploited to watermark digital images as a safety measure for storing information, but an attacker can destroy the information by cropping a segment of the watermarked image or doing salt and pepper noise. In recent years, numerous schemes were proposed that reduce the impact of such attacks. A new method has been proposed to confront cropping attack and salt and pepper noise that is carried out using two Sudoku tables. In this method, the watermark image is scattered in two Sudoku table layouts with different solutions and is watermarked in the host image with Least Significant Bit(LSB). Using this method, the watermark image is repeated 81 times in the host image, and to this effect the watermark image can be reconstructed using other segments when cropped or salt and pepper noise by the attacker. Both Sudokus used in this paper are in the classic 9x9 form and using this method, resistance to cropping attacks increases up to 98.8% and resistance to salt and pepper noise increase up to 80%
 S.M. Mousavi, A. Naghsh, S.A.R. Abu-Bakar, "Watermarking techniques used in medical image:a survey", Journal of Digital Imaging, Vol. 27, No. 6, pp. 714-729, Dec. 2014.
 Sunesh, H. Kumar,"Watermark attacks and applications in watermarking", Proceedings published in International Journal of Computer Applications, Vol. 5, No. 10, pp. 1-3, May. 2012.
 M.S.H. Goli, A. Naghsh, "Compare watermarking audio signal in image using transform domain", Proceeding of the MNE, pp. 78-81, Majlesi, Iran, 2016.
 M.S.H. Goli, A. Naghsh, "Robust digital image watermarking against salt and pepper noise using two-step sudoko",pp. 96-116, Proceeding of the MNE, Majlesi, Iran, 2016.
 V. Gupta, A. Barve,"A review on image watermarking and its techniques",International Journal of Advanced Research in Computer Science and Software Engineering, Vol. 2, No.1, pp. 73-81, Jan. 2014.
 M.S.H. Goli, A. Naghsh, "Robust digital image watermarking against salt and pepper noise using two-step sudoko",Proceeding of the ICEEC, pp. 65-73, Tehran, Iran, 2016.
 M.S.H. Goli, A. Naghsh, "Introducing a new method robust against crop attack in digital image watermarking using two-step sudoku", Proceeding of the IPRIA,pp. 53-63, Shahrekord, Iran, 2017.
 M.S.H. Goli, A. Naghsh, "A comparative study of image-in-image steganography using three methods of least significant bit, discrete wavelet transform and singular value decomposition",Bulletin de la Société Royale des Sciences de Liège, Vol. 85, No. 1, pp. 1465 – 1474, Dec. 2016.
 S.H. Saneie, A. Naghsh, "Robust digital image watermarking against cropping using sudoku in spatial and transform domain", Journal of Intelligent Procedures in Electrical Technology, Vol. 7, No.27, pp. 13-26,Agu. 2015.
 S.H.Saneie, A. Naghsh, "Introducing a new method of robust digital image watermarking against cropping and salt & peppe rnoise using sudoku", Majlesi Journal of Multimedia Processing, Vol.4,No.4, pp. 1- 4,Dec. 2015.
 K.A. Khalid Shamsul, M.D. Mustafa, M.M. Kamaruddin,"Anti cropping digital image watermarking using sudoku", International Journal of Grid and Utility Computing, Vol. 4, No. 3, pp. 1-9, Sep. 2013.
 K.A. Khalid Shamsul, M.D. Mustafa, M.M. Kamaruddin, "A robust digital image watermarking against salt & pepper using sudoku", Proceeding of the ICIEIS, Malaysia,2013.
 I.J. Cox, J. Kilian, T. Leighton,T. Shamoon,"A secure, robust watermark for multimedia",Workshop on Information Hiding, Cambridge, Jun. 1996.
 Y.M. Fang, J.W. Huang, S.Q. Wu,"CDMA-based watermarking resisting to cropping", Proceedings of the ISCAS, pp.25-28, Vancouver, Canada, May.2004.
 A. Aggarwal, M. Singla, "Robust water marking of colorimage under noise and cropping attack in spatialdomain", International Journal of Computer Science and Information Technologies, Vol. 2, No. 5, pp.2036-2041, Jun. 2011.
 S. Rawat, B. Raman, "A new robust watermarking scheme for color images", Proceedings of the IEEE 2nd International Advance Computing Conference, pp. 206-209, Patiala, India, Feb. 2010.
 R. Shetty, B.R. Rohith, J. Mukund, H. Rohan, "Steganography using sodoku puzzle", in Proceedings of the IEEE/ARTCC, pp.623-626, Kerala, India, Oct.2009.
 E. Russell, F. Jarvis, "Mathematics of sudoku 11", Mathematical Spectrum, Vol. 39, No. 2, pp.54-58, Jun. 2007.
 W.C. Wu, G.R. Ren, "A new approach to image authentication using chaotic map and sudoku puzzle", Proceedngs of the IEEE/IH-MSP, pp. 628431, Kyoto, Japan, Sep.2009.
 Y. Zou, X.L. Tian, S.W. Xia, Y. Song, "A novel image scrambling algorithm based on sudoku puzzle", Proceedings of the IEEE 4th International Congress on Image and Signal Processing, pp.737-740, Shanghai, China, Oct. 2011.