Improve Secured Digital Image Watermarking with Discrete Cosine Transform and ABCT

Nowadays Because of the internet's popularity and accessibility, digital watermarking is critical for preventing illegal redistribution of digital data. As a method of protecting sensitive information stored in digital images, "digital watermarking" has gained popularity. The goal of this proposed work is to suggest a secure watermarking scheme with applications in the medical field. As well as being undetectable, this scheme can also withstand numerous forms of attack. In order to maintain the security and authenticity of patient data, the proposed work requires the concealment of sensitive information within the host image. Domain concepts, like the spatial domain, transform domain, and wavelets, can be used to categories image watermarking methods. DCT algorithms increase computation time while also degrading image data hiding performance due to low PSNR values. The proposed technique ABCT increases PSNR values or makes digital image data more robust and invisible. Taking into account the following issues in the existing system (DCT) and the proposed technique, the goal is to provide excellent security to image data, with the message embedded within the image. Watermarking is used in conjunction with content encryption, with encryption providing the secure proposed technique from digital watermarking.