Modulation and Information Hiding in Images

摘要: We use concepts from communication theory to characterize information hiding schemes: the amount of that can be hidden, its perceptibility, and robustness removal modeled using quantities channel capacity, signal-to-noise ratio, jamming margin. then introduce new schemes whose parameters easily adjusted trade off imperceptibility, as required in application. The indicates most aggressive feasible parameter settings. also a technique called predistortion for increasing resistance JPEG compression. Analogous tactics are presumably possible whenever model anticipated distortion is available.