说明：  本文图像水印源代码，要是用的话请把里面的后缀为（.bmp）的图片变为自己的（.bmp)然后将源代码中在相关的代码变为对应的就可以。
(In this paper, the image watermark source code, if you use it, please change the image with suffix (. BMP) into your own (. BMP) and then change the relevant code in the source code into the corresponding one.)