Blind Image Watermarking Based on Local Analysis of Gradients

Digital image watermarking has been emerged as a basic method for copyright protection and authenticity of the owner. This paper proposes a novel and adaptive blind watermarking method using local analysis of gradients in an image block. The method partitions the image into non-overlapping blocks. The embedding is performed in the transfer domain of each image block. Two transform coefficients are modified using a variable strength factor. The …