人脸检测

1.接口描述

对照片中的人脸进行检测，返回人脸数目和每张人脸的位置信息

• 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

请求方式：

POST

请求URL：

https://cloudapi.linkface.cn/face/face_detect

2.请求参数

注释：

目前仅支持对人脸眼部的打码
请求参数 file , url 与 image_id 三选一。

参数 file 需把图片文件以 multipart/form-data 的形式放到 POST 消息体中。 打开自动旋转功能会增加运算时间，接口调用延迟变大，请酌情考虑是否开通，建议图片在客户端做旋转操作。

3.输出参数

正常响应 （200）

{
    "request_id": "TID4fd00a5e501e4d228613b47b29887da4",
    "status": "OK",
    "face_num": 1,
    "face_rect": [
        [
            230,
            378,
            703,
            850
        ]
    ],
    "image_id": "5ee041c364a1471b93d9f6101d3c0bd5"
}

4.错误码

输出示例：

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

5.输入示例

• cURL 样例

curl -X POST "https://cloudapi.linkface.cn/face/face_detect?api_id=ID&api_secret=SECRET" \
  -F file =@/PATH/TO/IMAGE1

• HTTPie 样例

http -f POST "https://cloudapi.linkface.cn/face/face_detect?api_id=ID&api_secret=SECRET" \
  file@/PATH/TO/IMAGE1

• 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/face/face_detect");
      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 filepath1="C:/Users/face1.jpg";//图片1路径
      public static final String POST_URL = "https://cloudapi.linkface.cn/face/face_detect";

      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);
            FileBody fileBody1 = new FileBody(new File(filepath1));
            MultipartEntity entity = new MultipartEntity();
            entity.addPart("file", fileBody1);
            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/face/face_detect')
  req = Net::HTTP::Post::Multipart.new uri.path,
        "file" => UploadIO.new(File.new("./px.jpg"), "image/jpeg", "px.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
  puts res.body
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 + '/face/face_detect'
    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/face/face_detect';  // url
   $selfiePath = 'C:/Users/face1.jpg';//图片1路径
   $selfieContent = '@' . realpath($selfiePath);
   $post_data = array ('api_id' => 'ID','api_secret' => 'SECRET',
             'file' => $selfieContent);
   $ch = curl_init();
   curl_setopt($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/face/face_detect';  // url
   $selfiePath = 'C:/Users/face1.jpg';//图片1路径
   $selfieContent = new \CURLFile($selfiePath);
   $post_data = array ('api_id' => 'ID','api_secret' => 'SECRET',
             'file' => $selfieContent);
   $ch = curl_init();
   curl_setopt($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);
?>