A Novel Distortion-free Data Hiding Scheme for High Dynamic Range Images

Information hiding has become an interesting topic that is arousing more and more attention. In 2011, Yu and Wu proposed a novel, distortion-free, information-hiding method based on the radiance format´s diversity expression for high dynamic range (HDR) images. In this paper, we propose a segment-based method that makes it possible to use all different expressions of every pixel´s radiance format to hide information, thereby further improving the performance of Yu and Wu´s scheme. The experimental results indicated that the proposed scheme did, indeed, outperforms Yu and Wu´s scheme in terms of hiding capacity and security for HDR images. In addition, the proposed scheme has more flexibility due to the flexibility of the segment size.