无论如何，看来猪可能就是病毒的原始宿主。

However, it seems likely that pigs were the original host.

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方法通过对宿主图像和水印图像的小波变换，该算法把水印图像的低频成分嵌入到原始宿主图像的低频部分。

Methods Based on wavelet transform of watermark image and host image, low-frequency ingredient of watermark is embedded in low-frequency part of host image.

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当图像（宿主信息）遭到加噪、高斯低通滤波、剪切等攻击后，其可视度、提取的水印图像与原始水印图像的类似度都是十分令人称心的；

When the image (host information) is added a noise, gaussian low-pass filter, shear attacks, the mandible, extract the original watermark image watermark image and the similarity is very satisfactory;

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