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。
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.
出处
《微计算机信息》
2011年第9期80-82,共3页
Control & Automation
基金
院级课题<高等职业教育中项目教学法的实践研究>
课题编号为ZZYKY0608
关键词
小波变换
数字水印
Wavelet Transform
Digital Watermarking
