Gray image watermarking using slant transform, lifting wavelet transform and singular value decomposition
Roshan Koju, Shashidhar Ram Joshi · 2016
A novel method of semi-blind image watermarking is proposed in this paper. The proposed method is performed by using slant transform along with lifting wavelet transform and singular value decomposition. Host images are decomposed using Lifting wavelet transform. Singular value decomposition is applied on its selected sub band. Singular value decomposed cover image is watermarked using slant transformed watermark image. The method focuses on invisible watermarking, performance evaluation metrics and imperceptibility of watermarked image. Scaling factor is varied from 0.001 to 0.1 to observe the performance of proposed method.