APPARATUS AND METHOD FOR REVERSIBLE DATA HIDING IN JPEG IMAGES

摘要

Embodiments of the invention are directed toward reversible/invertible and lossless, image data hiding that can imperceptibly hide data into digital images and can reconstruct the original image without any distortion after the hidden data have been extracted. In particular, embodiments of the invention provide a lossless data hiding technique for JPEG images based on histogram pairs, that embeds data into the JPEG quantized 8x8 block DCT coefficients and achieves good performance in terms of peak signal-to-noise ratio (PSNR) versus payload through manipulating histogram pairs with optimum threshold and optimum region of the JPEG DCT coefficients. Furthermore, the technology is expected to be able to apply to the I-frame of Motion Picture Experts Group (MPEG) video for various applications including annotation, authentication, and forensics.