阿里人脸识别接口

你的名字 2022-01-10 05:03 840阅读 0赞

最近研究了一下阿里的人脸识别功能，只是调用阿里提供的接口返回数据给我们就OK了。  
详细文档可参考阿里的api  [阿里人脸识别api][api]

人脸比对的方法

直接上代码吧：

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1 package com.guoxin.common.test;
      2 
      3 import sun.misc.BASE64Encoder;
      4 import javax.crypto.Mac;
      5 import javax.crypto.spec.SecretKeySpec;
      6 import org.slf4j.Logger;
      7 import org.slf4j.LoggerFactory;
      8 import com.alibaba.fastjson.JSON;
      9 import com.alibaba.fastjson.JSONObject;
     10 import java.io.*;
     11 import java.net.HttpURLConnection;
     12 import java.net.URL;
     13 import java.net.URLConnection;
     14 import java.security.MessageDigest;
     15 import java.text.SimpleDateFormat;
     16 import java.util.Date;
     17 import java.util.Locale;
     18 
     19 //@SuppressWarnings("restriction")
     20 public class FaceDemoVerify {
     21     private final static Logger logger = LoggerFactory.getLogger(FaceDemoVerify.class.getName());
     22     /*
     23      * 计算MD5+BASE64
     24      */
     25     public static String MD5Base64(String s) {
     26         if (s == null)
     27             return null;
     28         String encodeStr = "";
     29         byte[] utfBytes = s.getBytes();
     30         MessageDigest mdTemp;
     31         try {
     32             mdTemp = MessageDigest.getInstance("MD5");
     33             mdTemp.update(utfBytes);
     34             byte[] md5Bytes = mdTemp.digest();
     35             BASE64Encoder b64Encoder = new BASE64Encoder();
     36             encodeStr = b64Encoder.encode(md5Bytes);
     37         } catch (Exception e) {
     38             throw new Error("Failed to generate MD5 : " + e.getMessage());
     39         }
     40         return encodeStr;
     41     }
     42     /*
     43      * 计算 HMAC-SHA1
     44      */
     45     public static String HMACSha1(String data, String key) {
     46         String result;
     47         try {
     48             SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), "HmacSHA1");
     49             Mac mac = Mac.getInstance("HmacSHA1");
     50             mac.init(signingKey);
     51             byte[] rawHmac = mac.doFinal(data.getBytes());
     52             result = (new BASE64Encoder()).encode(rawHmac);
     53         } catch (Exception e) {
     54             throw new Error("Failed to generate HMAC : " + e.getMessage());
     55         }
     56         return result;
     57     }
     58     /*
     59      * 等同于javaScript中的 new Date().toUTCString();
     60      */
     61     public static String toGMTString(Date date) {
     62         SimpleDateFormat df = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss z", Locale.UK);
     63         df.setTimeZone(new java.util.SimpleTimeZone(0, "GMT"));
     64         return df.format(date);
     65     }
     66     /*
     67      * 发送POST请求
     68      */
     69     public static String sendPost(String url, String body, String ak_id, String ak_secret) throws Exception {
     70         PrintWriter out = null;
     71         BufferedReader in = null;
     72         String result = "";
     73         int statusCode = 200;
     74         try {
     75             URL realUrl = new URL(url);
     76             /*
     77              * http header 参数
     78              */
     79             String method = "POST";
     80             String accept = "application/json";
     81             String content_type = "application/json";
     82 
     83 //            String content_type = "application/octet-stream";
     84 
     85             String path = realUrl.getFile();
     86             String date = toGMTString(new Date());
     87             // 1.对body做MD5+BASE64加密
     88             String bodyMd5 = MD5Base64(body);
     89             String stringToSign = method + "\n" + accept + "\n" + bodyMd5 + "\n" + content_type + "\n" + date + "\n"
     90                     + path;
     91             // 2.计算 HMAC-SHA1
     92             String signature = HMACSha1(stringToSign, ak_secret);
     93             // 3.得到 authorization header
     94             String authHeader = "Dataplus " + ak_id + ":" + signature;
     95             // 打开和URL之间的连接
     96             URLConnection conn = realUrl.openConnection();
     97             // 设置通用的请求属性
     98             conn.setRequestProperty("accept", accept);
     99             conn.setRequestProperty("content-type", content_type);
    100             conn.setRequestProperty("date", date);
    101             conn.setRequestProperty("Authorization", authHeader);
    102             // 发送POST请求必须设置如下两行
    103             conn.setDoOutput(true);
    104             conn.setDoInput(true);
    105             // 获取URLConnection对象对应的输出流
    106             out = new PrintWriter(conn.getOutputStream());
    107             // 发送请求参数
    108             out.print(body);
    109             // flush输出流的缓冲
    110             out.flush();
    111             // 定义BufferedReader输入流来读取URL的响应
    112             statusCode = ((HttpURLConnection)conn).getResponseCode();
    113             if(statusCode != 200) {
    114                 in = new BufferedReader(new InputStreamReader(((HttpURLConnection)conn).getErrorStream()));
    115             } else {
    116                 in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    117             }
    118             String line;
    119             while ((line = in.readLine()) != null) {
    120                 result += line;
    121             }
    122         } catch (Exception e) {
    123             e.printStackTrace();
    124         } finally {
    125             try {
    126                 if (out != null) {
    127                     out.close();
    128                 }
    129                 if (in != null) {
    130                     in.close();
    131                 }
    132             } catch (IOException ex) {
    133                 ex.printStackTrace();
    134             }
    135         }
    136         if (statusCode != 200) {
    137             throw new IOException("\nHttp StatusCode: "+ statusCode + "\nErrorMessage: " + result);
    138         }
    139         return result;
    140     }
    141     /*
    142      * GET请求
    143      */
    144     public static String sendGet(String url, String ak_id, String ak_secret) throws Exception {
    145         String result = "";
    146         BufferedReader in = null;
    147         int statusCode = 200;
    148         try {
    149             URL realUrl = new URL(url);
    150             /*
    151              * http header 参数
    152              */
    153             String method = "GET";
    154             String accept = "application/json";
    155             String content_type = "application/json";
    156 
    157 //            String content_type = "application/octet-stream";
    158             String path = realUrl.getFile();
    159             String date = toGMTString(new Date());
    160             // 1.对body做MD5+BASE64加密
    161             // String bodyMd5 = MD5Base64(body);
    162             String stringToSign = method + "\n" + accept + "\n" + "" + "\n" + content_type + "\n" + date + "\n" + path;
    163             // 2.计算 HMAC-SHA1
    164             String signature = HMACSha1(stringToSign, ak_secret);
    165             // 3.得到 authorization header
    166             String authHeader = "Dataplus " + ak_id + ":" + signature;
    167             // 打开和URL之间的连接
    168             URLConnection connection = realUrl.openConnection();
    169             // 设置通用的请求属性
    170             connection.setRequestProperty("accept", accept);
    171             connection.setRequestProperty("content-type", content_type);
    172             connection.setRequestProperty("date", date);
    173             connection.setRequestProperty("Authorization", authHeader);
    174             connection.setRequestProperty("Connection", "keep-alive");
    175             // 建立实际的连接
    176             connection.connect();
    177             // 定义 BufferedReader输入流来读取URL的响应
    178             statusCode = ((HttpURLConnection)connection).getResponseCode();
    179             if(statusCode != 200) {
    180                 in = new BufferedReader(new InputStreamReader(((HttpURLConnection)connection).getErrorStream()));
    181             } else {
    182                 in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    183             }
    184             String line;
    185             while ((line = in.readLine()) != null) {
    186                 result += line;
    187             }
    188         } catch (Exception e) {
    189             e.printStackTrace();
    190         } finally {
    191             try {
    192                 if (in != null) {
    193                     in.close();
    194                 }
    195             } catch (Exception e) {
    196                 e.printStackTrace();
    197             }
    198         }
    199         if (statusCode != 200) {
    200             throw new IOException("\nHttp StatusCode: "+ statusCode + "\nErrorMessage: " + result);
    201         }
    202         return result;
    203     }
    204     public static void main(String[] args) throws Exception {
    205         // 发送POST请求示例
    206         String ak_id = "L.............BL"; //用户ak
    207         String ak_secret = "7W..................4EPW"; // 用户ak_secret
    208         String url = "https://dtplus-cn-shanghai.data.aliyuncs.com/face/verify";
    209 
    210         //上传本地图片
    211         // Request body
    212         String pic_path = "C:\\Users\\TEST\\1.jpg";//本地图片的路径
    213         String pic_path2 = "C:\\Users\\TEST\\8.jpg";//本地图片的路径 
    214         
    215         File picBase64 = new File(pic_path);
    216         File picBase642 = new File(pic_path2);
    217         String pic = encodeImageToBase64(picBase64);
    218         String pic2 = encodeImageToBase64(picBase642);
    219 //        String pic = encodeImageToBase64(pic_path);
    220 //        String pic2 = encodeImageToBase64(pic_path2);
    221         //提出base64编码的换行符问题
    222         String data = pic.replaceAll("[\\s*\t\n\r]", "");
    223         String data2 = pic2.replaceAll("[\\s*\t\n\r]", "");
    224         data = "'" + data + "'";
    225         data2 = "'" + data2 + "'";
    226         String body = "{\"type\":1,\n" +
    227                 "\"content_1\":"+data+",\n" +
    228                 "\"content_2\":"+data2+"\n" +
    229                 "}";
    230 
    231         String re = sendPost(url, body, ak_id, ak_secret);
    232         System.out.println("response body:" + re);
    233         
    234         getJsonData(re);
    235     }
    236 
    237     /**
    238      * 将本地图片编码为base64
    239      *
    240      * @param file
    241      * @return
    242      * @throws Exception
    243      */
    244     public static String encodeImageToBase64(File file) throws Exception {
    245         //将图片文件转化为字节数组字符串，并对其进行Base64编码处理
    246 //        loggerger.info("图片的路径为:" + file.getAbsolutePath());
    247         InputStream in = null;
    248         byte[] data = null;
    249         //读取图片字节数组
    250         try {
    251             in = new FileInputStream(file);
    252             data = new byte[in.available()];
    253             in.read(data);
    254             in.close();
    255         } catch (IOException e) {
    256             e.printStackTrace();
    257             throw new Exception("图片上传失败,请联系客服!");
    258         }
    259         //对字节数组Base64编码
    260         BASE64Encoder encoder = new BASE64Encoder();
    261         String base64 = encoder.encode(data);
    262         return base64;//返回Base64编码过的字节数组字符串
    263     }
    264     
    265     /**
    266      * 将网络图片编码为base64
    267      *
    268      * @param url
    269      * @return
    270      * @throws BusinessException
    271      */
    272     public static String encodeImageToBase64(URL url) throws Exception {
    273         //将图片文件转化为字节数组字符串，并对其进行Base64编码处理
    274         logger.info("图片的路径为:" + url.toString());
    275         //打开链接
    276         HttpURLConnection conn = null;
    277         try {
    278             conn = (HttpURLConnection) url.openConnection();
    279             //设置请求方式为"GET"
    280             conn.setRequestMethod("GET");
    281             //超时响应时间为5秒
    282             conn.setConnectTimeout(5 * 1000);
    283             //通过输入流获取图片数据
    284             InputStream inStream = conn.getInputStream();
    285             //得到图片的二进制数据，以二进制封装得到数据，具有通用性
    286             ByteArrayOutputStream outStream = new ByteArrayOutputStream();
    287             //创建一个Buffer字符串
    288             byte[] buffer = new byte[1024];
    289             //每次读取的字符串长度，如果为-1，代表全部读取完毕
    290             int len = 0;
    291             //使用一个输入流从buffer里把数据读取出来
    292             while ((len = inStream.read(buffer)) != -1) {
    293             //用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
    294                 outStream.write(buffer, 0, len);
    295             }
    296             //关闭输入流
    297             inStream.close();
    298             byte[] data = outStream.toByteArray();
    299             //对字节数组Base64编码
    300             BASE64Encoder encoder = new BASE64Encoder();
    301             String base64 = encoder.encode(data);
    302 //            logger.info("网络文件[{}]编码成base64字符串:[{}]", url.toString(), base64);
    303             return base64;//返回Base64编码过的字节数组字符串
    304         } catch (IOException e) {
    305             e.printStackTrace();
    306             throw new Exception("图片上传失败,请联系客服!");
    307         }
    308     }
    309 
    310     
    311     public static void getJsonData(String re){
    312 //        String s = "{\"confidence\":80.6434326171875,\"thresholds\":[61.0,69.0,75.0],\"rectA\":[92,50,74,87],\"rectB\":[171,101,118,137],\"errno\":0,\"request_id\":\"754af075-1d6b-4cb0-a709-7015eac53a7c\"}";
    313         JSONObject jsonObj = JSON.parseObject(re);
    314         
    315         String confidence = jsonObj.getString("confidence");
    316         System.out.println(confidence);
    317     }
    318 }

人脸比对

选择两本地照片或者网络，经过base64编码处理，作为两个参数传入调用，人脸比对接口，返回数据。

结果 如下

{\"confidence\":80.6434326171875,\"thresholds\":[61.0,69.0,75.0],\"rectA\":[92,50,74,87],\"rectB\":[171,101,118,137],\"errno\":0,\"request_id\":\"754af075-1d6b-4cb0-a709-7015eac53a7c\"}

confidence值即为比对结果的分数，分值越大两张脸相似度高。

转载于:https://www.cnblogs.com/atimo/p/10818743.html

[api]: https://help.aliyun.com/product/53257.html
[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
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