c#调用百度AI实现图片无损放大

code:

               /// <summary>
        /// 图片无损放大
        /// </summary>
        /// <returns></returns>
        public ActionResult ImageQualityEnhance()
        {
            //生成一个不重复的随机数作为图片的新名字
            string newName = Guid.NewGuid().ToString();
            //把-替换为空
            newName = newName.Replace("-", "");
            string host = "https://aip.baidubce.com/rest/2.0/image-process/v1/image_quality_enhance?access_token=" + AccessToken.getAccessToken().access_token;
            string result = BaiduAIBase64Tool.Invoke(host, "c:/img/5b4b48c1Nc91949da.jpg");
            ImageQualityEnhanceModel imageQualityEnhanceModel = JsonConvert.DeserializeObject<ImageQualityEnhanceModel>(result);
            //存储放大后的图片
            base64TOImg(imageQualityEnhanceModel.image, Server.MapPath("~/img/" + newName + ".jpg"));

            return View();
        }

        /// <summary>
        /// 把base64转化成图片并保存
        /// </summary>
        /// <param name="base64str"></param>
        private void base64TOImg(String base64str, string url)
        {
            Byte[] streamByte = Convert.FromBase64String(base64str);
            System.IO.MemoryStream ms = new System.IO.MemoryStream(streamByte);
            System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
            img.Save(url);
        }

model:

    public class ImageQualityEnhanceModel
    {
        public string log_id { get; set; }
        public string image { get; set; }
    }

调用工具类：

public class BaiduAIBase64Tool
    {
        public static string Invoke(string url, string imgurl)
        {
            //string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/bankcard?access_token=" + "sdfdsf";
            Encoding encoding = Encoding.Default;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "post";
            request.KeepAlive = true;
            // 图片的base64编码
            string base64 = getFileBase64(imgurl);
            String str = "multi_detect=true&image=" + HttpUtility.UrlEncode(base64);
            byte[] buffer = encoding.GetBytes(str);
            request.ContentLength = buffer.Length;
            request.GetRequestStream().Write(buffer, 0, buffer.Length);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            string result = reader.ReadToEnd();
            return result;
        }

        private static String getFileBase64(String fileName)
        {
            FileStream filestream = new FileStream(fileName, FileMode.Open);
            byte[] arr = new byte[filestream.Length];
            filestream.Read(arr, 0, (int)filestream.Length);
            string baser64 = Convert.ToBase64String(arr);
            filestream.Close();
            return baser64;
        }
    }