Azure 认知服务 (5) 计算机视觉API - 使用C#代码实现读取图片中的文字(OCR)功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Net.Http.Headers;
using System.Web;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            MakeRequest();
            Console.WriteLine("Hit ENTER to exit...");
            Console.ReadLine();
        }

        static async void MakeRequest()
        {
            var client = new HttpClient();
            var queryString = HttpUtility.ParseQueryString(string.Empty);

            // Request headers
            // 这里输入API Key
            client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", "{subscription key}");

            // Request parameters
            queryString["language"] = "unk";
            queryString["detectOrientation "] = "true";
            var uri = "https://api.cognitive.azure.cn/vision/v1.0/ocr?" + queryString;

            HttpResponseMessage response;

            // 这里输入使用的jpg图片路径
            string s = @"{""url"":" + @"""https://leizhangstorage.blob.core.chinacloudapi.cn/azureblog/ocr.jpg""}";

            // Request body
            byte[] byteData = Encoding.UTF8.GetBytes(s);

            using (var content = new ByteArrayContent(byteData))
            {
                content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
                response = await client.PostAsync(uri, content);

                var contents = await response.Content.ReadAsStringAsync();
            }
        }
    }
}