关键词: 彩色图像, 可逆信息隐藏, RGB通道, 像素预测

Abstract: In order to improve performance of color image Reversible Data Hiding（RDH）, a novel color image RDH method based on correlations of RGB channels is presented. At first, a RGB correlation based predictor is designed, including rough texture and precise texture prediction stages. Specifically, the first stage is to divide pixels into flat and texture regions by using one reference channel. In the second stage, the smooth pixel is classified into horizontal, vertical, smooth regions by using two reference channels so that the accurate prediction can be computed. The experimental results show the proposed predictor can accurately compute the prediction value and the data hiding performance is superior to the existing color image RDH methods.

Key words: color image, Reversible Data Hiding（RDH）, RGB channels, pixel prediction