Reversible Data hiding

1
Reversible Data hiding

• Authors Ni Zhicheng, Shi Yun Q., Ansari Nirwan
  and Su Wei Source IEEE Transactions on Circuits
  and Systems for Video
• Technology Accepted for future
  publication
• IF 1.842 (Rank 28/20913)
• Speaker Chih-Chiang Lee(???)
• Date 3/10/2006

2
Outline

• Introduction
• Proposed method
• Experimental results
• Conclusions
• Comments

3
Introduction
Stego image
Cover image
Embedding algorithm
Secret data
Cover image
Stego image
Extraction algorithm
Secret data
4
Proposed method-embedding
histogram
original image
a3 b6
peak
zero
5
Proposed method-embedding
Secret data 10011011
stego image
6
Proposed method-extraction
peak
zero
stego image
a3 b6
Secret data 10011011
original image
7
Proposed Method- maximum and minimum points
original image
a3 b6
maximum point
minimum point
Record the coordinate of those pixels of b as
overhead bookkeeping information hidden
datasecret data overhead data
8
Proposed Method- multiple pairs of maximum and
minimum points
original image
a1
b1
a2
b2
9
Proposed Method- the lower bound of the PSNR
peak point
zero point
10
Experimental results
11
Experimental results
12
Experimental results
13
Experimental results
14
Experimental results
15
Experimental results
16
Experimental results
17
Experimental results
18
Conclusions

• This algorithm is simple and the execution time
  is sort.
• The PSNR of the marked image is above 48dB.
• The pure payload is about 5k-80k bits into a
  5125128 grayscale image.

19
Comments
histogram
original image
a3 b0,6,7
peak
zero
zero
00
11
01
10