脆弱水印提取算法，与embed.rar中的嵌入算法相对应，可以提供较好的篡改定位-Fragile watermark extraction algorithm, and embed.rar correspond to the embedding algorithm can provide better tamper positioning

可以实现图像篡改检测，附带有几张图片，检测效果一般(Image tamper detection can be achieved, with pictures, the detection effect is general)