A Robust Watermarking Scheme Using Selective Curvelet Coefficients

In this paper, a digital watermarking algorithm used in the curvelet domain is proposed. Wrapping of specially selected Fourier samples is employed to implement fast discrete curvelet transforms (FDCT) to transform the digital image to the curvelet domain. Based on the capacity of the watermark and the impact of the variation of the curvelet coefficients, the proper positions to embed the watermark were chosen. The experimental results show that watermark is robust to most of the signal processing operations, including Common Image Processing Attacks like Histogram Equalization, Brighter Filter, Darker Filter, Increase Contrast, Decrease Contrast, Median Filtering, JPEG Compression attack, Gaussian Noise attack and Laplacian Filtering.