A fast coding method for distortion-free data hiding in high dynamic range image

Abstract

Reversible data hiding (RDH) technique allows the original cover to be lossless restored after the secret message is extracted, and high dynamic range (HDR) images are becoming more and more popular. We found that the existing RDH schemes for HDR image will cause serious stream expansion, which means that the storage size of the cover HDR image will expand. Noticing that we proposed a fast coding method named reverse-Golomb code for message embedding in all-zero cover to reduce the number of the alteration of pixel’s status, and thus reduce the stream expansion of cover HDR images. The experimental results show the superiority of our method.