Improved Reversible Data Hiding in JPEG Images Based on Interval Correlation

The redundancy of JPEG images is lower than that of noncompressed images, so any modification will greatly reduce the visual effect and produce file expansion. In this paper, a new RDH algorithm for JPEG images based on interval correlation is proposed. Through the quantization of DCT, the secret message is embedded into a continuous interval with large correlation and low distortion by using histogram shifting (HS). Experimental result shows that the proposed algorithm has better peak signal noise ratio (PSNR) and file expansion than the state-of-the-art HS algorithms for JPEG.