Title :
Watermark embedded in permuted domain
Author_Institution :
Nat. Lien-Ho Inst. of Technol., Miaoli, Taiwan
fDate :
1/18/2001 12:00:00 AM
Abstract :
A scheme is proposed in which a watermark is transformed and then used to modify the third, fourth, or fifth bit of the pixels in a permuted image according to a chaotic binary sequence. The PSNR is larger than 44 dB and the extracted watermarks are still recognisable when the compression ratio reaches 39%
Keywords :
binary sequences; chaos; copy protection; data compression; image coding; PSNR; chaotic binary sequence; compression ratio; permuted domain; watermark;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010065
