A CLASSICAL REVIEW ON ADVANCED DIGITAL IMAGE WATERMARKING TECHNIQUES

The world has become a global village in digital era due to advances in internet and communication technology. Presently, creation, copy and transmission of image data via internet and mobile phone are very common practices. The access, sharing, replication and manipulation of medical images have become daily needs. Image data distributed can be copied repeatedly without errors putting the rights of owners at risk. Even though encrypted for distribution, images can be unprotected after decryption. Deployment of information and communication technology infrastructure is bringing revolution to health industry. Consequently, worldwide e-health technology and associated standards demand strong security of medical image data. Digital image data security is achieved by different ways.Digital image watermarking provides copyright protection and authentication by hiding ownership information in image data. This paper presents motivation along with vast number of application area of digital image watermarking. The paper mainly focuses on classical review of variety of advanced image watermarking techniques. The paper recommends transform domain image watermarking for strong provision of imperceptibility, robustness and security. This study also draws some significant conclusions based on classical review of advanced image watermarking techniques