-One can choose whether or not to watermark their image to let others know a secret is inside! Custom watermarks are available. -Scramble your message...
Shi, Yi Shi, Embedding image watermarks in DC components, IEEE Trans. on Circuits and Systems for Video Technology. 2000, 10(6), pp. 974-979....
“Robust copyright protection using multiple ownership watermarks,” Optics ...4. Xiao-Wei Li, In-Kwon Lee, “3D image encoding in FT domain based ...