Blind Digital Watermarking Algorithm Based on Singular Value Decomposition and Discrete Wavelet Transform
Jiang Nan · Dalian Minzu Xueyuan xuebao · 2013
A blind digital image watermarking scheme based on singular value decomposition(SVD) and discrete wavelet transform(DWT) is proposed in this paper.This algorithm executes DWT transform on the original image,and the low-frequency approximation subband(LL2) of the DWT domain is partitioned into non-overlapping blocks with 2×2 pixels.For each block,the SVD technique is performed to obtain its singular value decomposition.The quantization step S is used to quantify the max singular value of each block based on the embedded watermark.The experimental results demonstrate that the algorithm has good robustness to the noise,median filtering,cropping,scale,JPEG compression and so on.