DocumentCode :
2795189
Title :
Researches on a Fractal Watermarking Algorithm Based on Luminance Shifting Factor
Author :
Jiang, Aiping ; Han, Yulan
Author_Institution :
Coll. of EE, Heilongjiang Univ., Harbin, China
fYear :
2009
fDate :
6-8 Nov. 2009
Firstpage :
377
Lastpage :
381
Abstract :
A new fractal watermarking algorithm is proposed, in which the watermark embedded can be extracted well. To achieve high-quality extracted watermark under some image attacks, the algorithm selects a suitable image arbitrarily and performs fractal encoding for the image. Then the image is decoded after the watermark image takes the place of the luminance shifting factor in the fractal codebook. Finally according to sub-block DCT watermarking algorithm, the decoded binary image is embedded into the DCT middle frequency coefficients of the original image to obtain the watermarked image. Experimental results demonstrate the good robustness and invisibility of our approach proposed.
Keywords :
brightness; discrete cosine transforms; image coding; watermarking; DCT middle frequency coefficient; binary image decoding; discrete cosine transform; fractal encoding; fractal watermarking; luminance shifting factor; subblock DCT watermarking algorithm; Decoding; Discrete cosine transforms; Discrete wavelet transforms; Educational institutions; Fractals; Frequency; Image coding; Robustness; Watermarking; Wavelet domain; discrete cosine transform (DCT); fractal image coding; luminance shifting factor; watermarking;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Chaos-Fractals Theories and Applications, 2009. IWCFTA '09. International Workshop on
Conference_Location :
Shenyang
Print_ISBN :
978-0-7695-3853-2
Type :
conf
DOI :
10.1109/IWCFTA.2009.85
Filename :
5362038
Link To Document :
بازگشت