Lossless Information Hiding Scheme Based on Predictive Coding

In recent years, many lossless information hiding techniques have been proposed, such as difference expansion, integer transformation method, histogram modification and so on. Histogram modification modifies the maximum pixel value of the histogram which generated from a host image to embed secret messages. The image quality of this method is quite good but the information capacity is low. To solve this problem, we propose a lossless information hiding scheme in this paper. The proposed scheme uses predictive coding technique to generate an external histogram and an internal histogram. Both of them are used to conceal the secret message. According to the experimental results, the proposed method can not only increase the information capacity but also keep the image quality.