Nothing But a Kiss: A Novel and Accurate Approach to Assessing the Performance of Multidimensional Distortion-Compensated Dither Modulation

摘要

A considerable amount of attention has been lately paid to a number of data hiding methods based on quantization, seeking to achieve in practice the results predicted by Costa for a channel with side information at the encoder. In this paper we analyze a multidimensional extension of the implementation of Costa's result know as DC-QIM. The presented analysis is based on measuring the probabilities of decoding error in the presence of two important kinds of additive channel distortions. DC-QIM is able to achieve a probability of decoding error of less than 1e-02 for 0 dB of watermark to noise ratio and only 20 samples per hidden bit. Empirical results supporting our analysis are given both for synthetic data and real images.