菜品识别
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          图像识别

          菜品识别

          接口描述

          该请求用于菜品识别。即对于输入的一张图片(可正常解码,且长宽比适宜),输出图片的菜品名称、卡路里信息、置信度。

          请求说明

          请求示例

          HTTP 方法:POST

          请求URL: https://aip.baidubce.com/rest/2.0/image-classify/v2/dish

          URL参数:

          参数
          access_token 通过API Key和Secret Key获取的access_token,参考“Access Token获取

          Header如下:

          参数
          Content-Type application/x-www-form-urlencoded

          Body中放置请求参数,参数详情如下:

          请求参数

          参数 是否必选 类型 说明
          image 和url二选一 string 图像数据,base64编码,要求base64编码后大小不超过4M,最短边至少15px,最长边最大4096px,支持jpg/png/bmp格式。注意:图片需要base64编码、去掉编码头(data:image/jpg;base64,)后,再进行urlencode。
          url 和image二选一 string 图片完整URL,URL长度不超过1024字节,URL对应的图片base64编码后大小不超过4M,最短边至少15px,最长边最大4096px,支持jpg/png/bmp格式,当image字段存在时url字段失效。
          top_num unit32 返回结果top n,默认5.
          filter_threshold float 默认0.95,可以通过该参数调节识别效果,降低非菜识别率.
          baike_num integer 返回百科信息的结果数,默认不返回

          请求代码示例

          提示一:使用示例代码前,请记得替换其中的示例Token、图片地址或Base64信息。

          提示二:部分语言依赖的类或库,请在代码注释中查看下载地址。

          curl -i -k 'https://aip.baidubce.com/rest/2.0/image-classify/v2/dish?access_token=【调用鉴权接口获取的token】' --data 'image=【图片Base64编码,需UrlEncode】&top_num=5' -H 'Content-Type:application/x-www-form-urlencoded'
          <?php
          /**
           * 发起http post请求(REST API), 并获取REST请求的结果
           * @param string $url
           * @param string $param
           * @return - http response body if succeeds, else false.
           */
          function request_post($url = '', $param = '')
          {
              if (empty($url) || empty($param)) {
                  return false;
              }
          
              $postUrl = $url;
              $curlPost = $param;
              // 初始化curl
              $curl = curl_init();
              curl_setopt($curl, CURLOPT_URL, $postUrl);
              curl_setopt($curl, CURLOPT_HEADER, 0);
              // 要求结果为字符串且输出到屏幕上
              curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
              curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
              // post提交方式
              curl_setopt($curl, CURLOPT_POST, 1);
              curl_setopt($curl, CURLOPT_POSTFIELDS, $curlPost);
              // 运行curl
              $data = curl_exec($curl);
              curl_close($curl);
          
              return $data;
          }
          
          $token = '[调用鉴权接口获取的token]';
          $url = 'https://aip.baidubce.com/rest/2.0/image-classify/v2/dish?access_token=' . $token;
          $img = file_get_contents('[本地文件路径]');
          $img = base64_encode($img);
          $bodys = array(
              'image' => $img,
              'top_num' => 5
          );
          $res = request_post($url, $bodys);
          
          var_dump($res);
          package com.baidu.ai.aip;
          
          import com.baidu.ai.aip.utils.Base64Util;
          import com.baidu.ai.aip.utils.FileUtil;
          import com.baidu.ai.aip.utils.HttpUtil;
          
          import java.net.URLEncoder;
          
          /**
          * 菜品识别
          */
          public class Dish {
          
              /**
              * 重要提示代码中所需工具类
              * FileUtil,Base64Util,HttpUtil,GsonUtils请从
              * https://ai.baidu.com/file/658A35ABAB2D404FBF903F64D47C1F72
              * https://ai.baidu.com/file/C8D81F3301E24D2892968F09AE1AD6E2
              * https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3
              * https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3
              * 下载
              */
              public static String dish() {
                  // 请求url
                  String url = "https://aip.baidubce.com/rest/2.0/image-classify/v2/dish";
                  try {
                      // 本地文件路径
                      String filePath = "[本地文件路径]";
                      byte[] imgData = FileUtil.readFileByBytes(filePath);
                      String imgStr = Base64Util.encode(imgData);
                      String imgParam = URLEncoder.encode(imgStr, "UTF-8");
          
                      String param = "image=" + imgParam + "&top_num=" + 5;
          
                      // 注意这里仅为了简化编码每一次请求都去获取access_token,线上环境access_token有过期时间, 客户端可自行缓存,过期后重新获取。
                      String accessToken = "[调用鉴权接口获取的token]";
          
                      String result = HttpUtil.post(url, accessToken, param);
                      System.out.println(result);
                      return result;
                  } catch (Exception e) {
                      e.printStackTrace();
                  }
                  return null;
              }
          
              public static void main(String[] args) {
                  Dish.dish();
              }
          }
          # encoding:utf-8
          
          import requests
          import base64
          
          '''
          菜品识别
          '''
          
          request_url = "https://aip.baidubce.com/rest/2.0/image-classify/v2/dish"
          # 二进制方式打开图片文件
          f = open('[本地文件]', 'rb')
          img = base64.b64encode(f.read())
          
          params = {"image":img,"top_num":5}
          access_token = '[调用鉴权接口获取的token]'
          request_url = request_url + "?access_token=" + access_token
          headers = {'content-type': 'application/x-www-form-urlencoded'}
          response = requests.post(request_url, data=params, headers=headers)
          if response:
              print (response.json())
          #include <iostream>
          #include <curl/curl.h>
          
          // libcurl库下载链接:https://curl.haxx.se/download.html
          // jsoncpp库下载链接:https://github.com/open-source-parsers/jsoncpp/
          const static std::string request_url = "https://aip.baidubce.com/rest/2.0/image-classify/v2/dish";
          static std::string dish_result;
          /**
           * curl发送http请求调用的回调函数,回调函数中对返回的json格式的body进行了解析,解析结果储存在全局的静态变量当中
           * @param 参数定义见libcurl文档
           * @return 返回值定义见libcurl文档
           */
          static size_t callback(void *ptr, size_t size, size_t nmemb, void *stream) {
              // 获取到的body存放在ptr中,先将其转换为string格式
              dish_result = std::string((char *) ptr, size * nmemb);
              return size * nmemb;
          }
          /**
           * 菜品识别
           * @return 调用成功返回0,发生错误返回其他错误码
           */
          int dish(std::string &json_result, const std::string &access_token) {
              std::string url = request_url + "?access_token=" + access_token;
              CURL *curl = NULL;
              CURLcode result_code;
              int is_success;
              curl = curl_easy_init();
              if (curl) {
                  curl_easy_setopt(curl, CURLOPT_URL, url.data());
                  curl_easy_setopt(curl, CURLOPT_POST, 1);
                  curl_httppost *post = NULL;
                  curl_httppost *last = NULL;
                  curl_formadd(&post, &last, CURLFORM_COPYNAME, "image", CURLFORM_COPYCONTENTS, "【base64_img】", CURLFORM_END);
                  curl_formadd(&post, &last, CURLFORM_COPYNAME, "top_num", CURLFORM_COPYCONTENTS, "5", CURLFORM_END);
          
                  curl_easy_setopt(curl, CURLOPT_HTTPPOST, post);
                  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, callback);
                  result_code = curl_easy_perform(curl);
                  if (result_code != CURLE_OK) {
                      fprintf(stderr, "curl_easy_perform() failed: %s\n",
                              curl_easy_strerror(result_code));
                      is_success = 1;
                      return is_success;
                  }
                  json_result = dish_result;
                  curl_easy_cleanup(curl);
                  is_success = 0;
              } else {
                  fprintf(stderr, "curl_easy_init() failed.");
                  is_success = 1;
              }
              return is_success;
          }
          using System;
          using System.IO;
          using System.Net;
          using System.Text;
          using System.Web;
          
          namespace com.baidu.ai
          {
              public class Dish
              {
                  // 菜品识别
                  public static string dish()
                  {
                      string token = "[调用鉴权接口获取的token]";
                      string host = "https://aip.baidubce.com/rest/2.0/image-classify/v2/dish?access_token=" + token;
                      Encoding encoding = Encoding.Default;
                      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(host);
                      request.Method = "post";
                      request.KeepAlive = true;
                      // 图片的base64编码
                      string base64 = getFileBase64("[本地图片文件]");
                      String str = "image=" + HttpUtility.UrlEncode(base64) + "&top_num=" + 5;
                      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.Default);
                      string result = reader.ReadToEnd();
                      Console.WriteLine("菜品识别:");
                      Console.WriteLine(result);
                      return result;
                  }
          
                  public 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;
                  }
              }
          }

          返回说明

          返回参数

          字段 是否必选 类型 说明
          log_id uint64 唯一的log id,用于问题定位
          result_num unit32 返回结果数目,及result数组中的元素个数
          result array() 菜品识别结果数组
          +name string 菜名,示例:鱼香肉丝
          +calorie float 卡路里,每100g的卡路里含量
          +probability float 识别结果中每一行的置信度值,0-1
          +baike_info object 对应识别结果的百科词条名称
          ++baike_url string 对应识别结果百度百科页面链接
          ++image_url string 对应识别结果百科图片链接
          ++description string 对应识别结果百科内容描述

          返回示例

          HTTP/1.1 200 OK
          x-bce-request-id: 73c4e74c-3101-4a00-bf44-fe246959c05e
          Cache-Control: no-cache
          Server: BWS
          Date: Tue, 18 Oct 2016 02:21:01 GMT
          Content-Type: application/json;charset=UTF-8
          {
          	"log_id": 7357081719365269362,
          	"result_num": 5,
          	"result": [
          	{
          		"calorie": "119",
          		"has_calorie": true,
          		"name": "酸汤鱼",
          		"probability": "0.396031"
          		"baike_info": {
          			"baike_url": "http://baike.baidu.com/item/%E9%85%B8%E6%B1%A4%E9%B1%BC/1754055",
          			"description": "酸汤鱼,是黔桂湘交界地区的一道侗族名菜,与侗族相邻的苗、水、瑶等少数民族也有相似菜肴,但其中以贵州侗族酸汤鱼最为有名,据考证此菜肴最早源于黎平县雷洞镇牙双一带。制作原料主要有鱼肉、酸汤、山仓子等香料。成菜后,略带酸味、幽香沁人、鲜嫩爽口开胃,是贵州“黔系”菜肴的代表作之一。这道菜通常先自制酸汤,之后将活鱼去掉内脏,入酸汤煮制。"
          		}
          	},
          	{
          		"calorie": "38",
          		"has_calorie": true,
          		"name": "原味黑鱼煲",
          		"probability": "0.265432",
          
          	},
          	{
          		"calorie": "144",
          		"has_calorie": true,
          		"name": "椒鱼片",
          		"probability": "0.0998993"
          	},
          	{
          		"calorie": "98",
          		"has_calorie": true,
          		"name": "酸菜鱼",
          		"probability": "0.0701917"
          	},
          	{
          		"calorie": "257.65",
          		"has_calorie": true,
          		"name": "柠檬鱼",
          		"probability": "0.0471465"
          	}]
          }
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