Digital Image Watermarking Scheme based on LWT Domain

Abstract

Digital watermarking technology is now attracting considerable attention as one of the potential solutions for protecting copyrights of digital images. In this paper, digital color image watermarking scheme based on Lifting Wavelet Transform (LWT) is proposed. The RGB color space is converted into YCbCr color space and Y component is selected for watermark embedding. The Y channel is transformed into frequency domain using Lifting Wavelet Transform (LWT). LWT decomposition is done with 'Harr' which is simple and symmetric wavelet. The proposed system focuses on an invisible and blind watermarking. The system will be tested on quality factors such as imperceptibility and performance evaluation metrics. The presented algorithm is implemented in Matlab.