for help on steganography projects

[Wen Liu <liuwen () gnuchina org>]

hi,folks, 
i know much have been done on steganography and watermarking in recent
years, now we are in a project that needs some kind of steganography,
but none of us has previous exp on this field. There must be some
existing project(no matter whether GPL or not) to implement this
function, but google did not give me a clear answer. :(( 

All we need is to embed a secret message or any type of file into a
image, transfer it, the other side decrypt the secret message/file,that's
all. thank you!

Cheers
Liu