Title :
A watermark algorithm based on SVD and image geometric correction
Author :
Jia, Xiaolin ; Qi, Yanli ; Shao, Liping ; Jia, Xiaobo
Author_Institution :
Sch. of Electron. & Inf. Eng., Xi´´an Jiaotong Univ., Xi´´an, China
Abstract :
An anti-geometric attack SVD digital watermark algorithm based on geometric center and image mass centroid is proposed. An improved block-based SVD is employed to embed and extract watermark. Based on the invariance of geometric center and image mass centroid, the conducted geometric transform can be detected, and the attacked image is corrected before extraction according to the detected transformation parameters. Experiments show that the proposed algorithm has low computational cost, good embedding capacity and shows perfect robustness in against large scale geometric deformation, the embedded watermark can be easily and exactly extracted.
Keywords :
feature extraction; image watermarking; singular value decomposition; antigeometric attack; block-based SVD; conducted geometric transform; digital watermark algorithm; geometric center invariance; image geometric correction; image mass centroid; large scale geometric deformation robustness; transformation parameters; watermark embedding; watermark extraction; Educational institutions; Estimation; Feature extraction; Image segmentation; Robustness; Transforms; Watermarking; Anti-geometric; Geometric Center; Image mass centroid; SVD; Watermark;
Conference_Titel :
Systems and Informatics (ICSAI), 2012 International Conference on
Conference_Location :
Yantai
Print_ISBN :
978-1-4673-0198-5
DOI :
10.1109/ICSAI.2012.6223409
