An optimal adaptive quantization index modulation watermarking a...A novel adaptive watermarking algorithm in discrete wavelet transform (DWT) based on quantization index modulation (QIM) technique ... by applying QIM. To improve the invisibility and robustness of watermarking system, the quantization step for each embedding
Geometrically robust image watermarking using scale-invariant fe...In order to resist geometric attacks, a robust image watermarking algorithm is proposed using scale-invariant feature transform (SIFT) and Zernike moments. As SIFT features are invariant to rotation and scaling, we employ SIFT to extract feature points. ...
Rotation, scaling, and translation invariant local watermarking ...A rotation, scaling, and translation invariant local watermarking is proposed with one or two Krawtchouk moment(s) of the original to estimate the geometric distortion parameters including rotation angle, scaling factor, and translation parameter. ...