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          文字识别

          出租车票识别

          接口描述

          支持识别全国各大城市出租车票的 12 个关键字段,包括发票号码、代码、车号、日期、时间、总金额、燃油附加费、叫车服务费、省、市、单价、里程。

          请求说明

          请求示例

          HTTP 方法: POST

          请求URL: https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt

          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 类型 是否必须 说明
          image string 图像数据,base64编码后进行urlencode,要求base64编码和urlencode后大小不超过4M,最短边至少15px,最长边最大4096px,支持jpg/jpeg/png/bmp格式

          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/ocr/v1/taxi_receipt?access_token=【调用鉴权接口获取的token】' --data 'image=【图片Base64编码,需UrlEncode】' -H 'Content-Type:application/x-www-form-urlencoded'
          # encoding:utf-8
          
          import requests
          import base64
          
          '''
          出租车票识别
          '''
          
          request_url = "https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt"
          # 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}
          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())
          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;
          
          /**
          * 出租车票识别
          */
          public class TaxiReceipt {
          
              /**
              * 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 taxiReceipt() {
                  // 请求url
                  String url = "https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt";
                  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;
          
                      // 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) {
                  TaxiReceipt.taxiReceipt();
              }
          }
          #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/ocr/v1/taxi_receipt";
          static std::string taxiReceipt_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
              taxiReceipt_result = std::string((char *) ptr, size * nmemb);
              return size * nmemb;
          }
          /**
          * 出租车票识别
          * @return 调用成功返回0,发生错误返回其他错误码
          */
          int taxiReceipt(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_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 = taxiReceipt_result;
                  curl_easy_cleanup(curl);
                  is_success = 0;
              } else {
                  fprintf(stderr, "curl_easy_init() failed.");
                  is_success = 1;
              }
              return is_success;
          }
          <?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/ocr/v1/taxi_receipt?access_token=' . $token;
          $img = file_get_contents('[本地文件路径]');
          $img = base64_encode($img);
          $bodys = array(
              'image' => $img
          );
          $res = request_post($url, $bodys);
          
          var_dump($res);
          using System;
          using System.IO;
          using System.Net;
          using System.Text;
          using System.Web;
          
          namespace com.baidu.ai
          {
              public class TaxiReceipt
              {
                  // 出租车票识别
                  public static string taxiReceipt()
                  {
                      string token = "[调用鉴权接口获取的token]";
                      string host = "https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt?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);
                      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("出租车票识别:");
                      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

          参数 类型 是否必须 说明
          log_id uint64 请求标识码,随机数,唯一。
          words_result_num uint32 识别结果数,表示words_result的元素个数
          InvoiceCode string 发票代号
          InvoiceNum string 发票号码
          TaxiNum string 车牌号
          Date string 日期
          Time string 上下车时间
          Fare string 总金额
          FuelOilSurcharge string 燃油附加费
          CallServiceSurcharge string 叫车服务费
          Province string
          City string
          PricePerkm string 单价
          Distance string 里程

          返回示例

          {
          	"log_id":2034039896,
          	"words_result_num":6,
          	"words_result":
          	{
          		"Date":"2017-11-26",
          		"Fare":"¥153.30元",
          		"InvoiceCode":"111001681009",
          		"InvoiceNum":"90769610",
          		"TaxiNum":"BV2062",
          		"Time":"20:42-21:07",
          		"FuelOilSurcharge": "¥0.00",
          		"CallServiceSurcharge": "¥0.00",
                  "Province": "浙江省",
                  "City": "杭州市",
                  "PricePerkm": "2.50元/KM",
                  "Distance": "4.5KM"
          	}
          }
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