Title :
A Semi-fragile Digital Watermarking Algorithm for 2D Vector Graphics Tamper Localization
Author :
Zhang, Han-ling ; Gao, Ming-ming
Author_Institution :
Coll. of Comput. & Commun., Hunan Univ., Changsha, China
Abstract :
A semi-fragile digital watermarking algorithm resisting affine transformation based on 2D vector graphics was designed for tamper localization. We divide graphics vertices after extraction, and then transform the construction of 8 × 8 matrix by DCT; authentication watermark is generated by the relationship between the DCT coefficients, and then embedded in the middle frequency region of the coefficients; pre-processing is proposed to eliminate geometric distortion before detecting. High invisibility, robust against common geometrical distortions (e.g. translation, rotation and scaling) and good capability of tamper localization have been proved by experimental results.
Keywords :
computer graphics; discrete cosine transforms; image coding; matrix algebra; message authentication; watermarking; 2D vector graphics; DCT; authentication watermark; semifragile digital watermarking algorithm; tamper localization; Authentication; Computer graphics; Computer security; Discrete cosine transforms; Educational institutions; Geographic Information Systems; Information security; Robustness; Spline; Watermarking; 2D vector graphics; DCT; affine transformation; semi-fragile watermarking; tamper localization.;
Conference_Titel :
Multimedia Information Networking and Security, 2009. MINES '09. International Conference on
Conference_Location :
Hubei
Print_ISBN :
978-0-7695-3843-3
Electronic_ISBN :
978-1-4244-5068-8
DOI :
10.1109/MINES.2009.224
