1. 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: /9/27

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

3. Related Work – AMBTC (1/2)
k: n × n image block
x: image block ( 𝑥 1 , 𝑥 2 ,.., 𝑥 𝑘 )
q: the number of pixels greater than the threshold value
{𝑎,𝑏}
𝑥 1
𝑥 2
𝑥 3
𝑥 4
𝑥 5
𝑥 6
𝑥 7
𝑥 8
𝑥 9
𝑥 10
𝑥 11
𝑥 12
𝑥 13
𝑥 14
𝑥 15
𝑥 16 1 𝑎 𝑏
𝐵 𝑚
Lema M, Mitchell O (1984) Absolute moment block truncation coding and its application to color images.
IEEE Trans Commun 32:1148–1157

4. Related Work – AMBTC (2/2)
quantization level
a: 111
130 92
133 97 90
124
106
116
130 92
161
165
133 97 90
170
147
175
140
183
124
194
106
116
111
167 1
161
165
170
147
175
140
183
194
Mean Value : 138
quantization level
b: 167

5. Proposed method (1/4) 𝑎 𝑏 𝑥 1 𝑥 2 𝑥 3 𝑥 4 𝑥 5 𝑥 6 𝑥 7 𝑥 8 𝑥 9 𝑥 10
𝑥 11
𝑥 12
𝑥 13
𝑥 14
𝑥 15
𝑥 16 1
AMBTC
Compressed block
Original block
Bit plane 𝑎
𝑎 𝑠 𝑏
𝑏 𝑠
Secret data bit stream
Secret data in base 3
Stego block

6. Proposed method (2/4) If |a-b|>1 ,embeddable
If |a-b|<=1,non-embeddable
130 92
161
165
133 97 90
170
147
175
140
183
124
194
106
116 1
111
167
AMBTC
Original block
Bit plane
Compressed block
Secret data bit stream
( ) 2
Secret data in base 3
( ) 3

7. Proposed method (3/4) 111 167 Secret data (12020201201002) 3 111 112
166
110
168
𝑖𝑓 𝑆=0, 𝑥 𝑖 = 𝑥 𝑖 𝑖𝑓 𝑆=1, 𝑥 𝑖 = 𝑥 𝑖 +1 𝑖𝑓 𝑆=2, 𝑥 𝑖 = 𝑥 𝑖 −1
Compressed block
Stego block

8. Proposed method (4/4) embeddable :
If number of different pixel>2 or different of values >=2
111
167
111
112
167
166
110
168
𝑖𝑓 𝑥 𝑖 = 𝑎 𝑜𝑟 𝑏 , 𝑆=0 𝑖𝑓 𝑥 𝑖 −1= 𝑎 𝑜𝑟 𝑏 , 𝑆=1 𝑖𝑓 𝑥 𝑖 +1= 𝑎 𝑜𝑟 𝑏 , 𝑆=2
Compressed block
Stego block
Secret data ( ) 3

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

10. 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.
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.

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