一种基于小波的脆弱水印算法

A Fragile Watermarking Arithmetic Based on Wavelet

针对数字产品的安全问题,根据离散小波变换(DWT)多分辨率性质,结合人类视觉系统(HVS)特征,提出了一种基于小波的脆弱水印算法.检测器从接收到的水印图像中提取出水印信号,并与原始水印进行比较,从而证明宿主图像是否有篡改发生.实验结果证明,该算法具有防篡改和准确识别篡改区域的能力.

In the light of safety question of digital products and combining the multi - resolution advantages of discrete wavelet transform （DWT） and the features of Human Visual System （ HVS）, we propose a fragile watermarking arithmetic based on wavelet. The tamper detector can pick up the watermarking signal from the received watermarked image, compared with the original watermark to prove whether the original image has been tampered or not. The experimental results demonstrate the arithmetic has the ability of defend -tamper and accurately locating where watermarked image has been tampered.