Open AccessA zero-watermarking algorithm of stereoscopic image based on hyperchaotic system
Author(s) -
Wujie Zhou,
Mei Yu,
Simin Yu,
Gangyi Jiang,
GE Ding-fei
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.080701
Subject(s) - watermark , digital watermarking , computer science , algorithm , image (mathematics) , stereoscopy , discrete cosine transform , wavelet , computer vision , image quality , artificial intelligence , discrete wavelet transform , wavelet transform
In order to protect the copyright of stereoscopic images in the condition of the image quality, a zero-watermarking stereoscopic image algorithm is presented based on hyperchaotic system. In the proposed algorithm, disparity zero-watermark is constructed according to the stability of disparity between low frequency bands of wavelet decomposition of the left and the right views and direct coefficients of discrete cosine transform; in the process of zero-watermark construction, the zero-watermark position mapping according to the features of the sensitivity of hyperchaotic discrete system initial value, ampleness of parameter key space and complexity of dynamic behavior, enhances the security of algorithm. The relationship between security and watermark capacity is also analyzed. Experimental results show that the proposed algorithm is strong robust to noise, filtering, compression, and the shearing of asymmetrical and symmetrical attacks.