Title :
A novel image digital watermark algorithm with weighted fractional calculus based on wavelet coefficients
Author :
Miao, Qi-Guang ; Shi, Cheng ; Wang, Wei
Author_Institution :
Sch. of Comput. Sci., Xidian Univ., Xi´´an, China
Abstract :
A novel digital watermark algorithm, based on fractional calculus and wavelet transform, is proposed in this paper. It makes full use of the characteristic of the high sensitive fractional order. The algorithm makes sinusoidal signal by fractional Cauchy formula with two differential orders. The sampled signals of the differential signals were superimposed as the pseudo-random sequence which is used to scramble the watermark. By exchanging the high-frequency coefficients of the carrier image, the scrambled watermark was embedded into the carrier image. Experimental results show that this novel algorithm is robust to a number of regular geometric attacks and many image processing operations. The new method given in this paper has a good performance on both robustness and invisibility.
Keywords :
calculus; image coding; mathematical programming; random sequences; watermarking; wavelet transforms; carrier image; differential signal; fractional Cauchy formula; image digital watermark algorithm; image processing operation; pseudorandom sequence; regular geometric attack; sampled signal; sensitive fractional order; sinusoidal signal; wavelet coefficient; weighted fractional calculus; Discrete wavelet transforms; Fractional calculus; Image coding; Pixel; Robustness; Watermarking; differential-order; digital watermarking; fractional calculus; wavelet transform;
Conference_Titel :
Computer Application and System Modeling (ICCASM), 2010 International Conference on
Conference_Location :
Taiyuan
Print_ISBN :
978-1-4244-7235-2
Electronic_ISBN :
978-1-4244-7237-6
DOI :
10.1109/ICCASM.2010.5623133