Resilient Digital Image Watermarking Using a DCT- Component Perturbation Model

摘要: The applications of the Discrete Cosine Transform (DCT) for Computer Generated Imagery, image processing and, in particular, compression are well known and DCT also forms central kernel a number digital watermarking methods. In this paper we consider application producing highly robust method images using block partitioning approach subject to self-alignment strategy bit error correction. algorithms presented include copyright protection Digital Right Management libraries, example. However, principal focus research reported is on use print-scan e-display-scan authentication e-tickets where QR code, example, embedded an full colour ticket holder. This requires that embedding procedure developed blur, noise, geometric distortions such as rotation, shift barrel partial removal segments, all which considered regard resilience proposed its practical realisation real operating environment.