A form of steganography in which an 'innocent' picture encodes a message.
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
|A | | | | | | |
+ +--+ +--+ +--+--+ +--+ +--+--+ + +--+ + +
| | | | g| | | | |
+ + + +--+ +--+ +--+ + +--+ +--+--+--+ + +
| | | | | | | | | | | i |
+ + +--+--+ + + + + +--+--+ + + + + + +
| | | | | | | | | | | | |
+ + + +--+ + + + +--+ + +--+--+ +--+--+ +
| a | | | | | | | | | | | |
+ +--+--+ +--+ + +--+ + +--+ + + + + + +
| | | | | |1 | | | | |
+ + +--+ + +--+--+ +--+ +--+--+--+--+ + +--+
| | | 2 S 4 | f | | | |
+ + +--+--+--+--+--+ + + + +--+ +--+--+ + +
| | |3 | | | h| | |
+--+--+ +--+ +--+--+ + + +--+--+--+ + +--+ +
| | | | | | d | | |
+--+ +--+--+--+ +--+--+ + +--+--+ +--+ + +--+
| f | | | | | | | | | |
+ +--+--+ + + +--+ + +--+ +--+--+ +--+ + +
| | | | | | |
+ + + +--+ +--+--+ +--+ +--+ +--+--+--+ + +
| | | | e |c | | | | | |
+ + +--+--+ +--+ + + +--+ + + + +--+ +--+
| | g | | | | | B |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
The
graph of the above maze is:
/-\ i
A - a | / \
\-/ g h
\ /
f
1-\ /-3-\ |
| >S< >-c-d-B
2-/ \-4-/ |
e
/ \
f---g
Although the message may not be easily understood, this is one of
many ways to encode information into a maze.