1 research outputs found
A lossless data hiding scheme in JPEG images with segment coding
In this paper, we propose a lossless data hiding scheme in JPEG images. After
quantified DCT transform, coefficients have characteristics that distribution
in high frequencies is relatively sparse and absolute values are small. To
improve encoding efficiency, we put forward an encoding algorithm that searches
for a high frequency as terminate point and recode the coefficients above, so
spare space is reserved to embed secret data and appended data with no file
expansion. Receiver can obtain terminate point through data analysis, extract
additional data and recover original JPEG images lossless. Experimental results
show that the proposed method has a larger capacity than state-of-the-art
works.Comment: 14 pages, 5 figures, 8 table