Among various digital image formats used in daily life, the Joint Photographic Experts Group (JPEG) is the most popular. Therefore, reversible data hiding (RDH) in JPEG images is important and useful for many applications such as archive management and image authentication. However, RDH in JPEG images is considerably more difficult than that in uncompressed images because there is less information redundancy in JPEG images than that in uncompressed images, and any modification in the compressed domain may introduce more distortion in the host image. Furthermore, along with the embedding capacity and fidelity (visual quality), which have to be considered for uncompressed images, the storage size of the marked JPEG file should be considered. In this paper, based on the philosophy behind the JPEG encoder and the statistical properties of discrete cosine transform (DCT) coefficients, we present some basic insights into how to select quantized DCT coefficients for RDH. Then, a new histogram shifting-based RDH scheme for JPEG images is proposed, in which the zero coefficients remain unchanged and only coefficients with values 1 and-1 are expanded to carry message bits. Moreover, a block selection strategy based on the number of zero coefficients in each 8×8 block is proposed, which can be utilized to adaptively choose DCT coefficients for data hiding. Experimental results demonstrate that by using the proposed method we can easily realize high embedding capacity and good visual quality. The storage size of the host JPEG file can also be well preserved.
|Number of pages
|IEEE Transactions on Circuits and Systems for Video Technology
|Published - 2016 Sept
Bibliographical noteFunding Information:
This work was supported in part by the Korea Foundation for Advanced Studies' International Scholar Exchange Fellowship for the academic year of 2013-2014; in part by the 973 Program of China under Grant 2011CB302204; in part by the National Natural Science Foundation of China under Grant 61173147, Grant U1135001, and Grant 61332012; in part by the Korean National Research Foundation under Grant 2015R1A2A2A01004587; and in part by the Shenzhen Research and Development Program under Grant GJHZ20140418191518323.
© 2016 IEEE.
- Block selection
- Joint Photographic Experts Group (JPEG)
- Reversible data hiding (RDH)
- histogram shifting (HS)
ASJC Scopus subject areas
- Media Technology
- Electrical and Electronic Engineering