Volume 15 (2023)
Volume 14 (2022)
Volume 13 (2021)
Volume 12 (2020)
Volume 11 (2019)
Volume 10 (2018)
Volume 9 (2017)
Volume 8 (2016)
Volume 7 (2015)
Volume 6 (2014)
Volume 5 (2013)
Volume 4 (2012)
Volume 3 (2011)
Volume 2 (2010)
Volume 1 (2009)
Optimum decoder for multiplicative spread spectrum image watermarking with Laplacian modeling

N. Zarmehi; M. R. Aref

Volume 8, Issue 2 , July 2016, , Pages 131-139


  This paper investigates the multiplicative spread spectrum watermarking method for the image. The information bit is spreaded into middle-frequency Discrete Cosine Transform (DCT) coefficients of each block of an image using a generated pseudo-random sequence. Unlike the conventional signal modeling, ...  Read More

A survey on digital data hiding schemes: principals, algorithms, and applications

M. A. Akhaee; F. Marvasti

Volume 5, Issue 1 , January 2013, , Pages 5-36


  This paper investigates digital data hiding schemes. The concept of information hiding will be explained at first, and its traits, requirements, and applications will be described subsequently. In order to design a digital data hiding system, one should first become familiar with the concepts and criteria ...  Read More

A chaos-based video watermarking algorithm

S. Mohammadi; A. Hakimi

Volume 4, Issue 1 , January 2012, , Pages 77-86


  The intriguing characteristics of chaotic maps have prompted researchers to use these sequences in watermarking systems to good effect. In this paper we aim to use a tent map to encrypt the binary logo to achieve a like-noise signal. This approach makes extraction of the watermark signal by potential ...  Read More