引言

现在照相馆越来越少了，拍摄证件照越来越贵了，还好我也打印机，还好我是个程序员

需求分析

使用百度人像分割技术，先将人像抠出开，在写入相对应的背景图片中即可

上代码

*首先我们使用百度人像分割文档地址：https://ai.baidu.com/tech/body/seg

 static void Main(string[] args)
        {

            // 设置APPID/AK/SK
            var APP_ID = "百度appID";
            var API_KEY = "百度API_KEY ";
            var SECRET_KEY = "百度SECRET_KEY ";

            var client = new Baidu.Aip.BodyAnalysis.Body(API_KEY, SECRET_KEY);
            client.Timeout = 60000;  // 修改超时时间
            var image = File.ReadAllBytes(@"图片地址");
            // 调用人像分割，可能会抛出网络等异常，请使用try/catch捕获
            var result = client.BodySeg(image);
            UploadImageByBase64String(result["foreground"].ToString());
            Console.ReadKey();
        }

将Base64位码保存成图片，并替换底色

  public static void UploadImageByBase64String(string imgStr)
        {
            var result="";
        
            try
            {
                byte[] bt = Convert.FromBase64String(imgStr);//获取图片base64
                string fileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString();//年月
                string ImageFilePath = Directory.GetCurrentDirectory()+"/Image" + "/" + fileName;
                if (!System.IO.Directory.Exists(ImageFilePath))//如果不存在就创建文件夹
                {
                    System.IO.Directory.CreateDirectory(ImageFilePath);
                }
                string ImagePath = ImageFilePath + "/" + System.DateTime.Now.ToString("yyyyHHddHHmmss");//定义图片名称
                File.WriteAllBytes(ImagePath + ".png", bt); //保存图片到服务器，然后获取路径  
                result = ImagePath + ".png";//获取保存后的路径

                Image Imageimage;
                Imageimage = System.Drawing.Image.FromFile(result);
                Bitmap bitmap = new Bitmap(Imageimage);
                //  bitmap.MakeTransparent(Color.Red);
                int width = bitmap.Size.Width;
                int height = bitmap.Size.Height;

                string ImagePath3 = ImageFilePath + "/" + System.DateTime.Now.ToString("yyyyHHddHHmmss") + "-33-.png";//定义图片名称

                Bitmap bmp = new Bitmap(width, height);
                Graphics g = Graphics.FromImage(bmp);
                SolidBrush b = new SolidBrush(Color.Yellow);//这里修改颜色
                g.FillRectangle(b, 0, 0, 300, 300);
                g.DrawImage(Imageimage, 0, 0);
                bmp.Save(ImagePath3);

            }
            catch (Exception e)
            {
                throw e;
            }

            Console.WriteLine(result);
        }