Title :
Robust Image Watermarking against Brightness and Contrast Change
Author :
Gong Daofu ; Liu Fenlin ; Luo Xiangyang ; Wang Ping
Author_Institution :
Zhengzhou Inf. Sci. & Technol. Inst., Zhengzhou, China
Abstract :
The brightness and contrast changes are common image processing, so a robust watermarking algorithm against them is presented based on image edge detection in this article. Firstly Prewitt operator is used for image edge detection. Secondly watermark is embedded into the gradient amplitude and direction of the edge point. The invisibility of our algorithm is better for the masking effect of human vision. And the robustness is also better for the stability of the edge.
Keywords :
brightness; differentiation; edge detection; gradient methods; image watermarking; mathematical operators; Prewitt operator; brightness change; contrast change; edge point direction; edge stability; gradient amplitude; human vision masking effect; image edge detection; image processing; robust image watermarking algorithm; watermark embedding; Brightness; Discrete cosine transforms; Image edge detection; PSNR; Robustness; Watermarking; brightness change; contrast change; image edge; robust watermarking;
Conference_Titel :
Multimedia Information Networking and Security (MINES), 2012 Fourth International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4673-3093-0
DOI :
10.1109/MINES.2012.252
