在matlab环境下图片生成水印。生成水印的过程，其实分为三个环节：第一，载入原始图片 第二，载入水印图片 第三，保存新的图片。-Images generated watermark in the Matlab environment. Generate a watermark in the process, in fact, divided into three components: First, load the original picture　second, loading watermark image　Third, save the new image.