人像综合评分服务

1.接口描述

该接口在身份核验的基础上，结合用户的活体检测动作，基于模型算法的能力，优先进行图片质量检测，判断用户图片是否清晰，是否过度曝光等；再对照片进行人像定位，特征提取；并最终判断是否为用户本人。
(注：此接口只提供比对相似度分数，不提供比对照片）

• 普通人脸图片要求
  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 2 MB，建议100KB以内
  4. 人脸双眼间距不小于30像素，建议90像素以上
  5. 图像中人脸图像较清晰，不因镜头散焦或运动而模糊
  6. 眼睛的瞳孔清晰可见,镜面无反光，禁止戴墨镜，且眼镜框不得遮挡眼睛，不要带宽框眼镜
  7. 人脸光线均匀且无阴影,亮度在200-800Lux，面部无明显反光、逆光、侧光
  8. 要求头发及饰物不能遮挡人脸，禁止戴口罩，帽子
  9. 表情自然、放松、无夸张动作,脸部区域完整、轮廓清晰、人脸比例不失真
  10. 照片中只允许有1张人脸，且背景简单，无复杂场景
  11. 人脸姿态要求，平面旋转（roll）±15°，俯仰变化（pitch）±10°，姿态偏转（yaw）±15°

• 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。
  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/identity/selfie_idnumber_verification

2.请求参数

参数 selfie_file,selfie_url,selfie_image_id与selfie_image_base64必四选一，如同时传入多个参数，本API使用顺序为selfie_image_id优先，其次selfie_file、selfie_image_base64、selfie_url。

若将 URL 放入 Query String 中则需要对特殊字符进行转义，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 selfie_file 需把图片文件的内容以 multipart/form-data 的形式放到 POST 消息体中。

参数 selfie_image_base64 需要注意：图片的base64编码是不包含图片头的，如data:image/jpg;base64。

打开自动旋转功能会增加运算时间,请酌情考虑是否开通此功能

3.返回参数

identity 的结构如下：

reason字段详细描述：

注：和/identity/liveness/idnumber_verification接口不同，此接口数据源返回的reason字段为Gongan photo doesn’t exist、Name and idcard number doesn’t match、Invalid idcard number返回状态码为200

>

置信度阈值与错误率对应关系：

> 备注：confidence阈值为0.7，由行业大数据训练得到，大于等于0.7是同一人

{
  "request_id": "TID8bf47ab6eda64476973cc5f5b6ebf57e",
  "status": "OK",
  "confidence": 0.312779,
  "selfie": { 
    "image_id": "xxxxx"
  },
  "identity": {
    "validity": true,
    "photo_id": "6963927a2b1e4fbc9abd9ff15638a2b5",
    "reason": "xxx"
  }
}

4.错误码

错误情况主要分为四种情况

1.账号和服务器报错，错误码为401、403、404、500

输出报错样例：

{
  "status": "RATE_LIMIT_EXCEEDED",
  "request_id": "TID8bf47ab6eda64476973cc5f5b6ebf57e"
}

2.输入参数报错，错误码为400，status为ENCODING_ERROR、DOWNLOAD_TIMEOUT、DOWNLOAD_ERROR、IMAGE_ID_NOT_EXIST、IMAGE_FILE_SIZE_TOO_BIG、CORRUPT_IMAGE、INVALID_IMAGE_FORMAT_OR_SIZE、INVALID_ARGUMENT ，其中根据status字段不同输出image(指哪一张图片出错）或reason

输出报错样例：

{
  "status": "DOWNLOAD_ERROR",
  "image": "selfie"
  "request_id": "TID8bf47ab6eda64476973cc5f5b6ebf57e"
}

注：我们会对输入用户姓名和身份证进行预判，如果输入错误，status为INVALID_ARGUMENT,reason字段的描述为：Invalid name 或Invalid idcard number

3.错误码为400，status为PHOTO_SERVICE_ERROR错误时，reason字段的描述如下：

输出报错样例：

{
  "status": "PHOTO_SERVICE_ERROR",
  "reason": "Gongan service timeout",
  "request_id": "TID8bf47ab6eda64476973cc5f5b6ebf57e"
}

4.如果已经调用成功数据源接口，但在接下来步骤报错（错误码为400，status为NO_FACE_DETECTED），我们会在错误响应的JSON中返回接口的状态。

字段说明如下：

identity 的结构描述：

参考样例如下：

{
  "status": "NO_FACE_DETECTED",
  "image": "selfie",
  "request_id": "TIDc5721b2b7cdb488fafb1e065c4c40619",
  "identity": {
    "validity": true,
    "photo_id": "6963927a2b1e4fbc9abd9ff15638a2b5",
    "reason": "xxx"
  }
}

5.输入示例

• cURL 样例

curl -X POST "https://cloudapi.linkface.cn/identity/selfie_idnumber_verification?api_id=ID&api_secret=SECRET" \
  -F selfie_file=@/PATH/TO/IMAGE -F id_number=NUMBER -F name=NAME

• HTTPie 样例

http -f POST "https://cloudapi.linkface.cn/identity/selfie_idnumber_verification?api_id=ID&api_secret=SECRET" \
  selfie_file@/PATH/TO/IMAGE id_number=NUMBER name=NAME

• 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,"id_number",
                  CURLFORM_COPYCONTENTS, "NUMBER",CURLFORM_END);
      curl_formadd(&formpost,&lastptr,CURLFORM_COPYNAME,"name",
                  CURLFORM_COPYCONTENTS, "NAME",CURLFORM_END);
      curl_formadd(&formpost,&lastptr,CURLFORM_COPYNAME,"selfie_file",
                  CURLFORM_FILE, argc[1], CURLFORM_END);

      curl_easy_setopt(curl, CURLOPT_URL, "https://cloudapi.linkface.cn/identity/selfie_idnumber_verification");
      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 java.nio.charset.Charset;
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/face.jpg";//图片路径
      public static final String POST_URL = "https://cloudapi.linkface.cn/identity/selfie_idnumber_verification";
      public static final String username = "name";//姓名
      public static final String id_number = "number";//身份证号

      public static void HttpClientPost() throws ClientProtocolException, IOException {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost post = new HttpPost(POST_URL);
            StringBody id = new StringBody(api_id);
            StringBody secret = new StringBody(api_secret);
            StringBody name = new StringBody(username,Charset.forName("UTF-8"));
            StringBody number = new StringBody(id_number);
            FileBody fileBody = new FileBody(new File(filepath));
            MultipartEntity entity = new MultipartEntity();

            entity.addPart("api_id", id);
            entity.addPart("api_secret", secret);
            entity.addPart("name", name);
            entity.addPart("id_number", number);
            entity.addPart("selfie_file", fileBody);
            System.out.println(username+name);
            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/identity/selfie_idnumber_verification')
  File.open("px.jpg") do |jpg|
    req = Net::HTTP::Post::Multipart.new uri.path,
          "selfie_file" => UploadIO.new(jpg, "image/jpeg", "px.jpg"),
          "api_id" => "ID",
          "api_secret" => "SECRET",
          "id_number" => "NUMBER",
          "name" => "NAME"
    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 + '/identity/selfie_idnumber_verification'
    files = {'selfie_file': open('/selfie/image/file/path', 'rb')}
    data = {'api_id': 'ID','api_secret': 'SECRET','id_number': 'ID_NUMBER','name':'NAME'}

    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/identity/selfie_idnumber_verification';  
   $filePath = 'C:/Users/face.jpg';  //图片路径
   $fileContent = '@' . realpath($filePath);
   $post_data = array ('api_id' => 'ID','api_secret' => 'SECRET','id_number' => 'NUMBER',
             'name' => 'NAME','selfie_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/identity/selfie_idnumber_verification';  
   $filePath = 'C:/Users/face.jpg';  //图片路径
   $fileContent = new \CURLFile($filePath);
   $post_data = array ('api_id' => 'ID','api_secret' => 'SECRET','id_number' => 'NUMBER',
             'name' => 'NAME','selfie_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);
?>