View
136
Download
11
Category
Preview:
DESCRIPTION
visual cryptography
Citation preview
1
Visual cryptography for color images
Source: Pattern Recognition,Volume:36, Issue: 7, July, 2003, pp. 1619-1629 Author: Young-Chang Hou Speaker: Wei-Liang Tai Date: 2003/5/15
2
Outline Review the basic theorems of visual
cryptography Visual cryptography for color image
Method 1 Method 2 Method 3
Conclusion
3
Basic theorem of visual cryptography
halftone
4
Basic theorem of visual cryptography ( 一 )
5
Visual Cryptography for color image
6
Method 1
7
Method 1 (cont.)
8
Method 2
9
Method 2 (cont.)
10
Method 3
11
Method 3 (cont.)
12
Conclusion
No computation required
Exploit the techniques of halftone technology and color decomposition to construct three method.
Recommended