/ocr/idcard

• 1.接口描述
• 2.请求参数
• 3.返回参数
• 4.错误码
• 5.输入示例

1.接口描述

该 API 用于识别静态身份证图像上的,文字信息。

算法主要针对第二代居民身份证，其他类型身份证检测结果准确率较低，仅供参考。

• 图片要求

  1. 格式为 JPG（JPEG），BMP，PNG，GIF，TIFF
  2. 宽和高大于 8px，小于等于4000px
  3. 小于等于 5 MB

• 支持自动识别人脸方向

  1. 上传的图片中包含有 exif 方向信息，先按此信息旋转、翻转后再做识别人脸方向并调整，并在返回结果中给出 exif_orientation 字段（如果没有则不输出）
  2. 如果照片方向混乱且 exif 方向信息不存在或不正确，自动识别人脸方向并调整

请求方式

POST

请求 URL

https://cloudapi.linkface.cn/ocr/idcard

2.请求参数

请求参数 file, url， image_id , image_base64 四选一。

如同时传入多个参数，本API使用顺序为image_id 优先，其次file 、image_base64、url

url 中含有不少特殊字符，若将 URL 放入 Query String 中则需要对这些字符进行转义，所有中文和特殊字符必需以UTF-8编码转义。 目前支持 http/https 等协议的网络地址。下载限时 5s，超时后仍未下载完成则属于失败。 参数 file 需把图片文件的内容以 multipart/form-data 的形式放到 POST 消息体中。

3.返回参数

info数组中字段的结构：

上传身份证正面照片时返回字段name,sex,nation,year,mouth,day,address和number，上传身份证背面照片时返回字段authority和timelimit。

validity数组中字段的结构：

上传身份证正面照片时返回字段name,sex,birthday,address和number，上传身份证背面照片时返回字段authority和timelimit。

>

当上传的图片是非身份证图片时，系统不会报错，但这种情况下 validity 中所有字段都会为 false，请参考 validity 字段进行判断。

• 身份证正面

{
  "request_id": "TID8bf47ab6eda64476973cc5f5b6ebf57e",
  "status": "OK",
  "exif_orientation": 1,
  "side": "front",
  "rotate": "cw270",
  "image_id":"xxxxx",
  "info": {
    "name": "小红",
    "sex": "女",
    "nation": "汉",
    "year": "1990",
    "month": "2",
    "day": "14",
    "address": "北京市海淀区xx路xx号",
    "number": "360722199002148230"
  },
  "validity": {
    "name": true,
    "sex": true,
    "birthday": true,
    "address": true,
    "number": true
  },
}

• 身份证反面

{
  "request_id": "TID8bf47ab6eda64476973cc5f5b6ebf57e",
  "status": "OK",
  "side": "back",
  "image_id":"xxxxx",
  "info": {
    "authority": "宜昌市公安局西陵分局",
    "timelimit": "20060529-20260529"
  },
  "validity": {
    "authority": true,
    "timelimit": true
  },
}

4.错误码

以下请求参数列表仅列出了接口请求参数，其它参数见公共请求参数页面。

{
  "status": "INVALID_ARGUMENT",
  "reason": "must specify 'image_id', 'file' or 'url' argument",
  "request_id": "TID8bf47ab6eda64476973cc5f5b6ebf57e"
}

5.输入示例

• cURL 样例

curl -X POST "https://cloudapi.linkface.cn/ocr/idcard?api_id=ID&api_secret=SECRET" \
  -F file=@/PATH/TO/IMAGE

• HTTPie 样例

http -f POST "https://cloudapi.linkface.cn/ocr/idcard?api_id=ID&api_secret=SECRET" \
  file@/PATH/TO/IMAGE

• C++ 样例

#include <iostream>
#include <cstring>
#include <exception>
#include <curl/curl.h>
#include <json/json.h>

using namespace std;
size_t callback(char *ptr, size_t size, size_t nmemb, string &stream){

  size_t sizes = size*nmemb;
  string temp(ptr,sizes);
  stream += temp;
  return sizes;
}
int main( int argv, char * argc[] ){

  CURL *curl;
  CURLM *multi_handle;
  CURLcode res;
  long code;
  string stream;
  struct curl_httppost *formpost = NULL;
  struct curl_httppost *lastptr = NULL;
  struct curl_slist *headerlist = NULL;

  try{

    curl_global_init(CURL_GLOBAL_DEFAULT);
    curl = curl_easy_init();

    if( curl ){

      curl_formadd(&formpost,&lastptr,CURLFORM_COPYNAME,"api_id",
                  CURLFORM_COPYCONTENTS, "ID",CURLFORM_END);
      curl_formadd(&formpost,&lastptr,CURLFORM_COPYNAME,"api_secret",
                  CURLFORM_COPYCONTENTS, "SECRET",CURLFORM_END);
      curl_formadd(&formpost,&lastptr,CURLFORM_COPYNAME,"file",
                  CURLFORM_FILE, argc[1], CURLFORM_END);

      curl_easy_setopt(curl, CURLOPT_URL, "https://cloudapi.linkface.cn/ocr/idcard");
      curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
      curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, callback);
      curl_easy_setopt(curl, CURLOPT_WRITEDATA, &stream);

      #ifdef SKIP_PEER_VERIFICATION
        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
      #endif
      #ifdef SKIP_HOSTNAME_VERIFICATION
        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
      #endif

      res = curl_easy_perform(curl);

      if( res != CURLE_OK ){
        cout<<"curl_easy_perform() failed:"<<curl_easy_strerror(res)<<endl;
        return -1;
      }
      curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
      Json::Value res_data;
      Json::Reader *reader = new Json::Reader(Json::Features::strictMode());
      if(!reader->parse(stream, res_data)){
        cout<<"parse error";
        return -1;
      }
      cout<<"HTTP Status Code:"<<code<<endl;
      cout<<res_data<<endl;
      curl_easy_cleanup(curl);
  }
    curl_global_cleanup();

  }catch(exception &ex){
    cout<<"curl exception:"<<ex.what()<<endl;
  }
}

• Java 样例

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

public class httpClientPost {

      public static final String api_id = "ID"; 
      public static final String api_secret = "SECRET"; 
      public static final String filepath = "C:/Users/card.jpg";//图片路径
      public static final String POST_URL = "https://cloudapi.linkface.cn/ocr/idcard";

      public static void HttpClientPost() throws ClientProtocolException, IOException {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost post = new HttpPost(POST_URL);
            FileBody fileBody = new FileBody(new File(filepath));
            StringBody id = new StringBody(api_id);
            StringBody secret = new StringBody(api_secret);
            MultipartEntity entity = new MultipartEntity();
            entity.addPart("file", fileBody);
            entity.addPart("api_id", id);
            entity.addPart("api_secret", secret);
            post.setEntity(entity);

            HttpResponse response = httpclient.execute(post);
            if (response.getStatusLine().getStatusCode() == 200) {
                HttpEntity entitys = response.getEntity();
                BufferedReader reader = new BufferedReader(
                    new InputStreamReader(entitys.getContent()));
                String line = reader.readLine();
                System.out.println(line);
            }else{
                HttpEntity r_entity = response.getEntity();
                String responseString = EntityUtils.toString(r_entity);
                System.out.println("错误码是："+response.getStatusLine().getStatusCode()+"  "+response.getStatusLine().getReasonPhrase());
                System.out.println("出错原因是："+responseString);
                //你需要根据出错的原因判断错误信息，并修改
            }

            httpclient.getConnectionManager().shutdown();
      }


    public static void main(String[] args) throws ClientProtocolException, IOException {
        HttpClientPost();
    }
}

• Ruby 样例

require 'net/http/post/multipart'
require 'json'

begin
  uri = URI.parse('https://cloudapi.linkface.cn/ocr/idcard')
  File.open("px.jpg") do |jpg|
    req = Net::HTTP::Post::Multipart.new uri.path,
          "file" => UploadIO.new(jpg, "image/jpeg", "idcard.jpg"),
          "api_id" => "ID",
          "api_secret" => "SECRET"
    res = Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.scheme == 'https') do |http|
      http.request(req)
    end
    result = JSON.parse(res.body)
    puts result
  end
rescue Exception => e
  puts e.message
end

• Python 样例

我们提供的样例支持 Python 2.7 & 3.4–3.7 和 PyPy，其他版本暂不提供，需要您查阅相关资料。

import requests

try:
    host = 'https://cloudapi.linkface.cn'
    url = host + '/ocr/idcard'
    files = {'file': open('/image/file/path', 'rb')}
    data = {'api_id': 'ID','api_secret': 'SECRET'}

    response = requests.post(url, files = files, data = data)
    result = response.json()
    print result
except Exception as e:
    print("type error: " + str(e))

• PHP 样例

我们提供的样例是基于 PHP 5.5 与 PHP 5.6 两个版本，其他版本暂不提供，需要您查阅相关资料。

以下样例是基于 PHP 5.5 版本的。

<?php
   $testurl = 'https://cloudapi.linkface.cn/ocr/idcard';  
   $filePath = 'C:/Users/idcard.jpg';  //图片路径
   $fileContent = '@' . realpath($filePath);
   $post_data = array ('api_id' => 'ID','api_secret' => 'SECRET',
             'file'=>$fileContent);
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $testurl);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);//您可以根据需要，决定是否打开SSL验证
   curl_setopt($ch, CURLOPT_POST,1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
   $output = curl_exec($ch);
   var_dump($output);
   curl_close($ch);
?>

以下样例是基于 PHP 5.6 版本的。

<?php
   $testurl = 'https://cloudapi.linkface.cn/ocr/idcard';  
   $filePath = 'C:/Users/idcard.jpg';  //图片路径
   $fileContent = new \CURLFile($filePath);
   $post_data = array ('api_id' => 'ID','api_secret' => 'SECRET',
             'file' => $fileContent);
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $testurl);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);//您可以根据需要，决定是否打开SSL验证
   curl_setopt($ch, CURLOPT_POST,1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
   $output = curl_exec($ch);
   var_dump($output);
   curl_close($ch);
?>