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.