Title :
Adaptive water marking
Author :
Wong, K.K. ; Tse, C.H. ; Ng, K.S. ; Lee, T.H. ; Cheng, L.M.
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
fDate :
11/1/1997 12:00:00 AM
Abstract :
The watermark is an important protection and identification technique that allows an invisible mark to be placed on top of normal information such as bank note, ID card, magnetic card and valuable documents. Watermarking techniques have been developed to protect digital images against illegal reproduction and illegal modifications when visibility to users is required. Here, we present a new adaptive watermarking algorithm. The adaptive watermark is generated from the image content and can be treated as a digital fingerprint of the image. As a transform based algorithm is used to encode the information in the histogram domain the proposed watermark is robust enough against any degradation, hacking and attack
Keywords :
adaptive signal processing; cryptography; identification; image coding; transform coding; adaptive water marking; attack robustness; degradation robustness; digital fingerprint; digital images; hacking robustness; histogram domain; identification technique; illegal modifications; illegal reproduction; image content; invisible mark; protection technique; transform based algorithm; visibility; Cryptography; Data security; Digital images; Discrete cosine transforms; Fingerprint recognition; Image generation; Pixel; Protection; Robustness; Watermarking;
Journal_Title :
Consumer Electronics, IEEE Transactions on
