【作者】 何沛思； 孙季丰；

【Author】 HE Pei-si,SUN Ji-feng (College of Information Science,South China University of Technology,Guangzhou 510641,China)

【机构】 华南理工大学电信学院；

【摘要】 为了实现对彩色图像等多媒体信息的版权保护,采用独立分量分析(ICA)和图像子采样技术,提出了一种基于离散小波变换(DWT)的彩色图像水印算法。该算法对原图像YIQ色彩空间的Y分量进行子采样,将置乱后的二值水印图像,嵌入到选定子图像的二级小波逼近子图中,嵌入水印的子图像位置由随机数确定,检测时利用快速ICA算法来提取水印。计算机仿真结果和性能分析表明,算法具有较好的隐蔽性和鲁棒性。更多还原

【Abstract】 To protect copyrights of multi-media data,such as color-images,effectively,a color-image watermarking algorithm is proposed based on independent component analysis(ICA) and subsampling in wavelet domain.After the selected sub-image of the Y branch of original image is transformed by two-level wavelet transform,the scrambled binary watermark is embedded into the detail sub-bands,and the embedded position is determined by a random number.The watermark is detected resorting to FASTICA algorithm.The experiment results show that the algorithm can ensure both concealment and robustness of the watermark.更多还原