Abstract
For the traditional steganographic method of Jsteg, the emmbedment of secret message is completed by dividing cover-image into nonoverlapping blocks of 8×8 pixels, discrete cosine transform (DCT) transforming, and using the standard 8×8 quantization table to quantize. In this paper, a novel steganographic method based on the JPEG quantization table modification is presented. Instead of dividing cover-image into 8×8 blocks, nonoverlapping blocks of 16×16 pixels is used. Both theoretical anlysis and experiment results show that the new methods has larger steganography capacity and better stego-image quality, compared with the method of Jsteg and Chang’s.
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Foundation item: Supported by the National Natural Science Foundation of China(50803016), the Fundamental Research Funds for the Central Universities
Biography: JIANG Cuiling, female, Lecturer, Ph. D., research direction: data hiding, image process.
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Jiang, C., Pang, Y., Guo, L. et al. A high capacity steganographic method based on quantization table modification. Wuhan Univ. J. Nat. Sci. 16, 223–227 (2011). https://doi.org/10.1007/s11859-011-0740-0
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DOI: https://doi.org/10.1007/s11859-011-0740-0