An AMBTC compression based data hiding scheme using

An AMBTC compression based data hiding scheme using pixel value adjusting strategy Sourse: Multidimensional Systems and Signal Processing, Volume 29, Issue 4, October 2018, pp 1801– 1818 Authors: Aruna Malik, Geeta Sikka, Harsh K. Verma Speaker: Guan-Long Li Date: 2018/9/20

Outline • Related Work ‒ Absolute moment block truncation coding(AMBTC) • Proposed method • Experiment Results • Conclusion 2

Related Work – AMBTC (1/2) 0 0 1 1 1 0 0 1 Lema M, Mitchell O (1984) Absolute moment block truncation coding and its application to color images. IEEE Trans Commun 32: 1148– 1157 3

Related Work – AMBTC (2/2) 9 9 10 9 12 11 9 11 8 13 8 14 6 8 13 12 7 Mean Value : 10 quantization level a: 8 9 9 8 8 6 8 7 10 12 11 11 13 14 13 12 0 1 8 12 1 0 1 0 12 8 0 1 1 0 8 12 12 8 quantization level b: 12 4

Proposed method (1/4) AMBTC 0 0 1 1 0 0 0 1 1 1 0 0 Compressed block Bit plane Original block Secret data in base 3 Secret data bit stream Stego block 5

Proposed method (2/4) 130 92 161 165 133 97 90 If |a-b|>1 , embeddable If |a-b|<=1, non-embeddable 0 0 1 1 111 167 0 0 0 1 111 111 167 147 175 140 183 1 1 167 167 124 194 106 116 0 1 0 0 111 167 111 Original block 170 AMBTC Bit plane Compressed block 6

Proposed method (3/4) 111 167 111 112 167 166 111 111 167 111 110 111 166 167 167 167 168 166 167 111 111 112 167 111 110 Compressed block Stego block 7

Proposed method (4/4) embeddable : If number of different pixel>2 or different of values >=2 111 167 111 112 167 166 111 111 167 111 110 111 166 167 167 167 168 166 167 111 111 112 167 111 110 Compressed block Stego block 8

Experiment Results (1/2) Stego-images of the proposed scheme 9

Experiment Results (2/2) Lin, C. C. , Liu, X. L. , Tai, W. L. , & Yuan, S. M. (2013). A novel reversible data hiding scheme based on AMBTC compression technique. Multimedia Tools and Applications. Ou, D. , & Sun, W. (2014). High payload image steganography with minimum distortion based on absolute moment block truncation coding. Multimedia Tools and Applications. Li, C. H. , Lu, Z. M. , & Su, Y. X. (2011). Reversible data hiding for BTC-compressed images based on bitplane flipping and histogram shifting of mean tables. Information Technology Journal, 10(7), 1421– 1426. 10 Chang, C. C. , Lin, C. Y. , & Fan, Y. H. (2008). Lossless data hiding for color images based on block truncation coding. Pattern Recognitation, 41(7), 2347– 2357.

Conclusions • Bit stream convert to base 3. -> Raise hiding capacity • Reversible data hiding in AMBTC compressed Image 11