N. Zarmehi
Electrical Engineering Department, Sharif University of Technology, Tehran, Iran Advanced Communications Research Institute, Sharif University of Technology, Tehran, Iran
[ 1 ] - Optimum decoder for multiplicative spread spectrum image watermarking with Laplacian modeling
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, we suppose that both signal and noise are distributed with Laplacian distribution, because the ...
نویسندگان همکار