Taxi ticket identification

Update time ： 2023-09-14

Interface description

It supports the identification of 16 key fields of taxi tickets in major cities across the country, including invoice number, code, vehicle number, date, total amount, fuel surcharge, call service fee, province, city, unit price, mileage, boarding time, alighting time, etc.

Online debugging

You can visit Sample Code Center Debug the interface in , you can perform signature verification, view the request content and return results of online calls, and automatically generate sample code.

Request Description

Request Example

HTTP method: POST

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

URL parameter:

parameter	value
access_token	Access_token obtained through API Key and Secret Key, refer to“ Access Token acquisition ”

The headers are as follows:

parameter	value
Content-Type	application/x-www-form-urlencoded

Place the request parameters in the body. The details of the parameters are as follows:

Request Parameters

parameter	Must	type	Optional value range	explain
image	And url/pdf_file/ofd_file	string	-	For image data, the size of urlencode after base64 encoding and urlencode shall not exceed 8M, the shortest side shall be at least 15px, the longest side shall be at most 4096px, and jpg/jpeg/png/bmp format is supported priority : image>url>pdf_file>ofd_file. When the image field exists, the url, pdf_file, and ofd_file fields become invalid
url	And image/pdf_file/ofd_file	string	-	The image is a complete url with a length of no more than 1024 bytes. The size of the image corresponding to the url after encoding in base64 does not exceed 8M. The shortest side is at least 15px, and the longest side is at most 4096px. It supports the jpg/jpeg/png/bmp format priority : image>url>pdf_file>ofd_file, when the image field exists, the url field is invalid Please close the URL anti-theft chain
pdf_file	And image/url/ofd_file	string	-	For PDF files, urlencode is performed after base64 encoding. The size of base64 encoding and urlencode is required to be no more than 8M, with the shortest side at least 15px and the longest side at most 4096px priority : image>url>pdf_file>ofd_file. When image and url fields exist, the pdf_file field becomes invalid
pdf_file_num	no	string	-	The corresponding page number of the PDF file that needs to be identified. When the pdf_file parameter is valid, identify the corresponding page content of the incoming page number. If not, identify the first page by default
ofd_file	And image/url/pdf_file	string	-	For OFD files, urlencode is performed after base64 encoding. The size of base64 encoding and urlencode is required to be no more than 8M, the shortest side is at least 15px, and the longest side is at most 4096px priority : image>url>pdf_file>ofd_file. When the image, url, and pdf_file fields exist, the ofd_file field becomes invalid
ofd_file_num	no	string	-	The corresponding page number of the OFD file to be identified. When the ofd_file parameter is valid, identify the corresponding page content of the incoming page number. If not, the default is to identify the first page

Request Code Example

Prompt 1 : Before using the sample code, remember to replace the sample token, image address or Base64 information.

Prompt 2 : Some languages depend on classes or libraries. Please check the download address in the code comment.

 curl -i -k ' https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt?access_token= [Call the token obtained from the authentication interface] ' --data 'image=[Picture Base64 encoding, UrlEncode required]' -H 'Content-Type:application/x-www-form-urlencoded'

 # encoding:utf-8

 import requests import base64 ''' Taxi ticket identification ''' request_url =  " https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt "
 #Open picture file in binary mode f =  open ( '[Local file]' ,  'rb' ) img = base64 . b64encode ( f . read ( ) ) params =  { "image" : img } access_token =  '[Token obtained by calling the authentication interface]' 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 ;

 /** *Taxi ticket identification */
 public  class  TaxiReceipt  {

     /** *Tool class required in important tip code *FileUtil, Base64Util, HttpUtil, GsonUtils *  https://ai.baidu.com/file/658A35ABAB2D404FBF903F64D47C1F72 *  https://ai.baidu.com/file/C8D81F3301E24D2892968F09AE1AD6E2 *  https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3 *  https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3 *Download */
     public  static  String  taxiReceipt ( )  {
         //Request url
         String url =  " https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt " ;
         try  {
             //Local file path
             String filePath =  [Local file path] ;
             byte [ ] imgData =  FileUtil . readFileByBytes ( filePath ) ;
             String imgStr =  Base64Util . encode ( imgData ) ;
             String imgParam =  URLEncoder . encode ( imgStr ,  "UTF-8" ) ;

             String param =  "image="  + imgParam ;

             //Note that the purpose here is to simplify the encoding and obtain access_token for each request. The online environment access_token has an expiration time, and the client can cache it and retrieve it after expiration.
             String accessToken =  "[Token obtained by calling the authentication interface]" ;

             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>

 //Download link of libcurl library: https://curl.haxx.se/download.html
 //Download link of jsoncpp library: 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 ;
 /** *The curl sends the callback function called by the http request. The returned body in json format is parsed in the callback function, and the parsing result is stored in the global static variable *See the libcurl document for @ param parameter definitions *@ return See the libcurl document for the definition of the return value */
 static size_t callback ( void  * ptr , size_t size , size_t nmemb ,  void  * stream )  {
     //The obtained body is stored in ptr and converted to string format first taxiReceipt_result = std :: string ( ( char  * ) ptr , size * nmemb ) ;
     return size * nmemb ;
 }
 /** *Taxi ticket identification *@ return If the call is successful, 0 will be returned. If an error occurs, other error codes will be returned */
 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 ,  one ) ; 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 =  one ;
             return is_success ;
         } json_result = taxiReceipt_result ;
         curl_easy_cleanup ( curl ) ; is_success =  zero ;
     }  else  {
         fprintf ( stderr ,  "curl_easy_init() failed." ) ; is_success =  one ;
     }
     return is_success ;
 }

 <? php
 /** *Initiate http post requests (REST APIs) and obtain the results of REST requests * @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 ;
     //Initialize curl
     $curl  =  curl_init ( ) ;
     curl_setopt ( $curl ,  CURLOPT_URL ,  $postUrl ) ;
     curl_setopt ( $curl ,  CURLOPT_HEADER ,  zero ) ;
     //The result is required to be a string and output to the screen
     curl_setopt ( $curl ,  CURLOPT_RETURNTRANSFER ,  one ) ;
     curl_setopt ( $curl ,  CURLOPT_SSL_VERIFYPEER ,  false ) ;
     //Post submission method
     curl_setopt ( $curl ,  CURLOPT_POST ,  one ) ;
     curl_setopt ( $curl ,  CURLOPT_POSTFIELDS ,  $curlPost ) ;
     //Run curl
     $data  =  curl_exec ( $curl ) ;
     curl_close ( $curl ) ;

     return  $data ;
 }

 $token  =  '[Token obtained by calling the authentication interface]' ;
 $url  =  ' https://aip.baidubce.com/rest/2.0/ocr/v1/taxi_receipt?access_token= '  .  $token ;
 $img  =  file_get_contents ( '[Local file path]' ) ;
 $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
     {
         //Taxi ticket identification
         public  static  string  taxiReceipt ( )
         {
             string token =  "[Token obtained by calling the authentication interface]" ;
             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 ;
             //Base64 encoding of pictures
             string base64 =  getFileBase64 ( [Local picture file] ) ;
             String str =  "image="  + HttpUtility . UrlEncode ( base64 ) ;
             byte [ ] buffer = encoding . GetBytes ( str ) ; request . ContentLength = buffer . Length ; request . GetRequestStream ( ) . Write ( buffer ,  zero , buffer . Length ) ;
             HttpWebResponse response =  ( HttpWebResponse ) request . GetResponse ( ) ;
             StreamReader reader =  new  StreamReader ( response . GetResponseStream ( ) , Encoding . Default ) ;
             string result = reader . ReadToEnd ( ) ; Console . WriteLine ( "Taxi ticket identification:" ) ; 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 ,  zero ,  ( int ) filestream . Length ) ;
             string baser64 = Convert . ToBase64String ( arr ) ; filestream . Close ( ) ;
             return baser64 ;
         }
     }
 }

Return description

Return parameters

parameter	Must	type	explain
log_id	yes	uint64	Request ID, random number, unique.
words_result_num	yes	uint32	The number of recognition results, representing the number of words_result elements
words_result	yes	object{}	Identification result array
+ InvoiceCode	yes	string	Invoice code
+ InvoiceNum	yes	string	Invoice No
+ TaxiNum	yes	string	license plate number
+ Date	yes	string	date
+ Time	yes	string	Boarding and alighting time
+ PickupTime	yes	string	Boarding time
+ DropoffTime	yes	string	Departure time
+ Fare	yes	string	amount of money
+ FuelOilSurcharge	yes	string	Fuel surcharge
+ CallServiceSurcharge	yes	string	Car call service fee
+ TotalFare	yes	string	Total amount
+ Location	yes	string	Billing City
+ Province	yes	string	province
+ City	yes	string	city
+ PricePerkm	yes	string	Unit Price
+ Distance	yes	string	mileage
pdf_file_size	no	string	The total number of pages of the incoming PDF file. This field is returned when the pdf_file parameter is valid

Return to Example

 {
	 "log_id" : two billion thirty-four million thirty-nine thousand eight hundred and ninety-six ,
	 "words_result_num" : sixteen ,
	 "words_result" :
	 {
		 "Date" : "2017-11-26" ,
		 "Fare" : "¥ 153.30 yuan" ,
         "Location" :  Beijing ,
		 "InvoiceCode" : "111001681009" ,
		 "InvoiceNum" : "90769610" ,
		 "TaxiNum" : "BV2062" ,
		 "Time" : "20:42-21:07" ,
         "PickupTime" : "20:42" ,
         "DropoffTime" : "21:07" ,
		 "FuelOilSurcharge" :  "¥1.00" ,
		 "CallServiceSurcharge" :  "¥1.00" ,
         "TotalFare" : "¥ 155.30" ,
         "Province" :  Beijing ,
         "City" :  Beijing ,
         "PricePerkm" :  "2.50 yuan/KM" ,
         "Distance" :  "4.5KM"
	 }
 }

Train ticket identification

Identification of aircraft itinerary