网站网页图像的文字水印小波算法

AN ALGORITHM OF TEXT WATER MARKING OF WEB SITE IMAGES

本文在网站彩色图像亮度分量的水印加注过程中,采用新的水印扩展算法,只需一级小波分解.并且,采用参考文献[1]基于F-范数的新的相似度定义.实验结果表明,新的水印扩展算法,有较好的不可见性;新的相似度定义也基本反映了水印的实际降质程度.

In this paper,new watermark extending algorithm is described and the mark is embedded in the luminance of color image.Only one level of decomposition is needed in the new watermark-extending algorithm.In detecting the presence of watermark,a new similarity is used based on F-norm [1].Experimental result shows that new watermark extending algorithm has relatively good perceptual transparency and new similarity reflects the practical degradation degree of image.