【摘要】 根据小波变换与人眼视觉特性相适应,提出的数字水印算法在图像的小波域进行,在嵌入水印前先对原始图像作小波变换,在小波变换的中低频系数上嵌入水印,然后再进行小波反变换,得到一幅加水印图像。在水印检测时先作小波变换,再在小波域中进行检测。实验结果表明改进算法具有较为理想的效果。更多还原

【Abstract】 On the basis of the wavelet transform and adapt to human visual system,the digital watermarking algorithm in the wavelet domain,wavelet transform for the original before the embedded watermark image,in the low-frequency coefficients of wavelet transform to embed watermarks,and then wavelet inverse transform to get an additional watermark image.In the Watermark detection,wavelet transform for the first,and then detected in the wavelet domain.The experimental results show that the improved algorithms have the better effectiveness of positioning.更多还原