该程序源码是水印提取的简单易懂源码实例，但可读性非常强强，适合初做水印与小波的朋友， 可直接使用。 已通过测试。 -The program source code is easy-to-understand source instance watermark extraction, but the readability is very strong, suitable for beginners to do the friends of the watermark and wavelet