Digital Image Watermarking Based on Wavelet Techniques: A Review

Digital watermarking is a technique for embedding information in to cover media to prove ownership. It became very important in the number of application areas such as copyright protection, fingerprinting, broadcast monitoring, and medical application. During the last several years, various watermarking techniques have been proposed by different authors. Wavelet based watermarking is gaining more and more popularity because of its resemblance to the human visual system. In this paper, we aim to elaborate wavelet based watermarking techniques, to compare different wavelet used for wavelet based watermarking techniques, to compare different wavelet used for wavelet based watermarking and to provide in-depth review of existing work done on wavelet based watermarking techniques.