http://www.datahide.com/BPCSe/
One file in this directory is SPIE98.pdf, which is a paper delivered at the SPIE conference in Boston.
Other files in this directory include:
| ochibo.bmp | Original "Gleaners" image |
| mz.ochibo.bmp | Gleaners image with swan image embedded within |
| swan.bmp | Swan image embedded in gleaners - unicorn image embedded within |
| unicorn.bmp | Image embedded in swan |
Note: These images are embedded like the nested dolls, one within the other. But embedded information doesn't have to be images; it can be any digital information. (Note that "The Gleaners" is an 1857 Francois Millet painting of women picking wheat from a previously harvested field.)
Other files in the directory:
| road.bmp | Original picture of a road |
| mz.road.bmp | Picture with the information described below embedded within |
| lincoln.jpg | One of the many things embedded in the road image |
The road picture
The road picture is 617x504 pixels. The information embedded in the road picture is given below. The total information embedded in this 933,408 byte image is actually 1,212,744 bytes before compression; i.e., the embedded information exceeds the vessel size by 30%! The compressed data size is 505,502 bytes, which is 54% of the vessel size. Even with this much information embedded in the image, the embedded and original images look nearly identical when viewed on the monitor.
The road picture contains:
|
|
Size |
Size |
| Lincoln Picture |
66,190
|
66,044
|
| The Gettysburg Address |
1,502
|
742
|
| The Declaration of Independence |
9,553
|
4,075
|
| The Constitution (with amendments) |
56,989
|
14,803
|
| The Magna Carta |
31,285
|
12,089
|
| Romeo and Juliet |
149,097
|
58,829
|
| Hamlet |
188,626
|
74,690
|
| Macbeth |
109,281
|
43,698
|
| A Midsummer Night's Dream |
99,623
|
40,242
|
| The Taming of the Shrew |
128,385
|
49,787
|
| The Tempest |
102,788
|
42,044
|
| A Comedy of Errors |
89,525
|
34,275
|
| Antony and Cleopatra |
179,900
|
64,184
|
| Total |
1,212,744
|
505,502
|
