Application of Digital Watermarking Using DWT for Copyright Security of Digital Images : Literature Review

Abstract

By adding invisible information to photos, digital watermarking becomes a viable copyright protection method. In order to improve the protection of digital image copyrights, this study examines the use of the Discrete Wavelet Transform (DWT) approach in digital watermarking. This study compares the findings of watermarking quality measures using Peak Signal-to-Noise Ratio (PSNR) and Mean Squared Error (MSE) parameters, and assesses the benefits and drawbacks of DWT in comparison to alternative watermarking techniques through a survey of ten pertinent publications. The analysis's findings demonstrate that DWT works well for embedding invisible watermarks, preserving images' visual quality, and offering strong resistance to a range of attacks, including compression and modification. Additionally, this approach performs better than spatial domain-based watermarking methods like Least Significant Bit (LSB). This study stimulates more research to improve parameters and investigate combinations of various watermarking techniques, and it suggests using DWT as the major method in digital watermarking for digital image copyright protection.