Title :
Polar co-ordinates shape adaptive discrete transform-based watermarking scheme for arbitrarily-shaped object
Author :
Ko, Yun-Ho ; Kim, Seong-Dae
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
10/25/2001 12:00:00 AM
Abstract :
A new watermarking scheme for arbitrarily-shaped image is proposed. Using co-ordinates conversion to log-polar and polar co-ordinates shape adaptive discrete transform (PSADT), the proposed watermarking method can be applied to any arbitrarily-shaped image such as MPEG-4 VOP and is much more robust to geometrical attacks than conventional ones
Keywords :
copy protection; data compression; discrete transforms; image coding; message authentication; MPEG-4 VOP; arbitrarily-shaped image; arbitrarily-shaped object; co-ordinates conversion; geometrical attack robustness; polar co-ordinates shape adaptive discrete transform; watermarking scheme;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010920
