使用face++的API接口-人脸识别

迈不过友情╰ 2022-06-08 06:42 507阅读 0赞

本文地址：http://blog.csdn.net/tiandixuanwuliang/article/details/78018687

本文将介绍如何使用face++的API接口实现人脸识别。

一、获取face++的API支持

1.1face++官网：https://www.faceplusplus.com.cn/

1.2在face++官网上注册账号，填写开发者资料，如下图：

![Center][]

二、创建API Key和绑定Bundle ID

2.1在如下图位置，点击API Key

![Image 1][] ![Image 1][] ![Center 1][]

2.2点击创建API key,按照要求填写（选择试用）：

![Center 2][]

2.3绑定应用程序：

![Image 1][]![Image 1][]![Center 3][]

至此，我们的准备工作就做好了。我们将会使用API Key和API Secret。

![Image 1][]

三、创建Android工程

3.1建立Android项目。本文使用Fragment+Activity模式，Activity代码是简单的fragment，如下

package com.wllfengshu.boyandgirl;
    
    import android.annotation.SuppressLint;
    import android.app.Activity;
    import android.app.FragmentManager;
    import android.app.FragmentTransaction;
    import android.os.Bundle;
    import android.view.View;
    
    public class MainActivity extends Activity {
    
    	private FragmentManager fm;
    	private FragmentTransaction transaction;
    
    	@SuppressLint("NewApi")
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    
    		fm = getFragmentManager();
    		transaction = fm.beginTransaction();
    		transaction.replace(R.id.ll_fregment, new FaceFragment());
    		transaction.commit();
    
    	}
    
    	public void change(View v) {
    		transaction = fm.beginTransaction();
    		switch (v.getId()) {
    		case R.id.ib_main_face:
    			transaction.replace(R.id.ll_fregment, new FaceFragment());
    			break;
    		case R.id.ib_main_gesture:
    			transaction.replace(R.id.ll_fregment, new GestureFragment());
    			break;
    		case R.id.ib_main_other:
    			transaction.replace(R.id.ll_fregment, new OtherFragment());
    			break;
    		}
    		transaction.commit();
    	}
    }

3.2fragment代码如下：（其中封装的函数会在下文中介绍）

package com.wllfengshu.boyandgirl;
    
    import java.io.IOException;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import org.json.JSONException;
    import org.json.JSONObject;
    
    import android.annotation.SuppressLint;
    import android.app.Fragment;
    import android.content.Intent;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.graphics.Paint;
    import android.os.Bundle;
    import android.os.Handler;
    import android.os.Message;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.view.ViewGroup;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import com.wllfengshu.util.Constant;
    import com.wllfengshu.util.DrawUtil;
    import com.wllfengshu.util.GifView;
    import com.wllfengshu.util.HttpUtils;
    import com.wllfengshu.util.ImageUtil;
    
    
    @SuppressLint({ "NewApi", "HandlerLeak" })
    public class FaceFragment extends Fragment implements OnClickListener {
    
    	private ImageView iv_face;// 锟矫伙拷选锟斤拷锟酵计�
    	private Button ib_face_enter;// 确锟斤拷锟斤拷钮
    	private Button ib_face_choice;// 选锟斤拷图片锟斤拷钮锟斤拷锟斤拷图锟解）
    
    	private TextView tv_face_gender;
    	private TextView tv_face_age;
    	private TextView tv_face_beauty;
    
    	private Bitmap scalingPhoto;// 位图
    
    	private String gender;// 性别
    	private int age;// 年龄
    	private int beauty;// 颜值
    
    	private Paint paint;// 画笔工具
    	private View view;
    	private GifView gif;
    
    	@Override
    	public View onCreateView(LayoutInflater inflater, ViewGroup container,
    			Bundle savedInstanceState) {
    		view = inflater.inflate(R.layout.fragment_face, container, false);
    
    		iv_face = (ImageView) view.findViewById(R.id.iv_face);
    		ib_face_enter = (Button) view.findViewById(R.id.ib_face_enter);
    		ib_face_choice = (Button) view.findViewById(R.id.ib_face_choice);
    
    		tv_face_gender = (TextView) view.findViewById(R.id.tv_face_gender);
    		tv_face_age = (TextView) view.findViewById(R.id.tv_face_age);
    		tv_face_beauty = (TextView) view.findViewById(R.id.tv_face_beauty);
    
    		gif = (GifView) view.findViewById(R.id.gif);
    
    		ib_face_enter.setOnClickListener(this);
    		ib_face_choice.setOnClickListener(this);
    
    		paint = new Paint();// 创建画笔
    		scalingPhoto = BitmapFactory.decodeResource(this.getResources(),
    				R.drawable.defualt);
    
    		return view;
    	}
    
    	@SuppressLint("HandlerLeak")
    	private Handler handler = new Handler() {
    		@Override
    		public void handleMessage(Message msg) {
    			String str = (String) msg.obj;
    			System.out.println("*******face:" + str);
    			if (str.equals("403") || str.equals("400") || str.equals("413")
    					|| str.equals("500")) {
    				Toast.makeText(getActivity(), "Please Try Again",
    						Toast.LENGTH_SHORT).show();
    				
    			} else {
    				try {
    					JSONObject resultJSON = new JSONObject(str);
    					System.out.println(resultJSON.getString("faces") + "=====");
    					if (resultJSON.getString("faces").equals("[]")) {
    						Toast.makeText(getActivity(),
    								"There is no face picture", Toast.LENGTH_SHORT)
    								.show();
    						
    					} else {
    						@SuppressWarnings("rawtypes")
    						List res = DrawUtil.FacePrepareBitmap(resultJSON,
    								scalingPhoto, paint, iv_face);
    						gender = (String) res.get(0);
    						age = (Integer) res.get(1);
    						beauty = (Integer) res.get(2);
    
    						System.out.println("------------" + gender + " " + age
    								+ " " + " " + beauty);
    
    						tv_face_gender.setText("性别:"
    								+ ImageUtil.getFaceGender(gender));
    						tv_face_age.setText("年龄:" + age);
    						tv_face_beauty.setText("颜值:" + beauty);
    					}
    				} catch (JSONException e) {
    					e.printStackTrace();
    				}
    			}
    			gif.setVisibility(View.GONE);// 停止gif
    		};
    	};
    
    	@Override
    	public void onActivityResult(int requestCode, int resultCode, Intent data) {
    		if (requestCode == 1) {
    			// 锟矫伙拷选锟斤拷锟酵计拷锟斤拷锟斤拷锟斤拷荽锟斤拷锟絛ata锟斤拷
    			if (data != null) {
    				// 锟矫碉拷图片锟斤拷路锟斤拷
    				String photoPath = ImageUtil.getPhotoPath(getActivity(), data);
    				// 锟斤拷锟斤拷
    				scalingPhoto = ImageUtil.getScalingPhoto(photoPath);
    				// 锟斤拷示图片
    				iv_face.setImageBitmap(scalingPhoto);
    			}
    		}
    		super.onActivityResult(requestCode, resultCode, data);
    	}
    
    	@Override
    	public void onClick(View v) {
    		switch (v.getId()) {
    		case R.id.ib_face_choice:
    			// 锟斤拷图锟斤拷
    			Intent intent = new Intent();
    			intent.setAction(Intent.ACTION_PICK);
    			intent.setType("image/*");
    			startActivityForResult(intent, 1);// 通锟斤拷氐锟斤拷蚩锟斤拷锟�
    			break;
    		case R.id.ib_face_enter:
    			// 显示加载动画
    			gif.setVisibility(View.VISIBLE);
    			gif.setMovieResource(R.raw.red); // 设置背景gif图片资源
    
    			
    			String base64ImageEncode = ImageUtil
    					.getBase64ImageEncode(scalingPhoto);
    			System.out.println(base64ImageEncode);
    			// 锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�
    			final Map<String, Object> map = new HashMap<String, Object>();
    			map.put("api_key", Constant.API_KEY);
    			map.put("api_secret", Constant.API_SECRET);
    			map.put("return_attributes", "gender,age,beauty");
    			map.put("image_base64", base64ImageEncode);
    
    			// 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
    			new Thread(new Runnable() {
    				@Override
    				public void run() {
    					try {
    						String result = HttpUtils
    								.post(Constant.URL_DETECT, map);
    						Message message = new Message();
    						message.obj = result;
    						handler.sendMessage(message);
    					} catch (IOException e) {
    						e.printStackTrace();
    					}
    				}
    			}).start();
    			break;
    		}
    	}
    }

上面代码说明：fragment页面中包含两个按钮,一个按钮点击“打开手机图库”，一个按钮点击“确认”。用户点击确认后，开始把用户选择的人脸图片通过POST请求方式发送到face++服务器，等待获取人脸特征的数据。  
其中封装的POST请求代码如下：

public static String post(String url, Map<String, Object> args) throws IOException {
    		
    		URL host = new URL(url);
    		HttpURLConnection connection = HttpURLConnection.class.cast(host.openConnection());
    		
    		connection.setRequestMethod("POST");
    		
    		connection.setDoOutput(true);
    		connection.setDoInput(true);
    		
    		connection.setUseCaches(false);
    		connection.setRequestProperty("Connection", "Keep-Alive");
    		connection.setRequestProperty("Charsert", "UTF-8");
    		DataOutputStream dos = new DataOutputStream(connection.getOutputStream());
    
    		
    		if (args != null) {
    			for (Entry<String, Object> entry : args.entrySet()) {
    				String key = entry.getKey(); 
    				Object value = entry.getValue();
    
    				if (value instanceof File) {
    					value = new FileInputStream(File.class.cast(value));
    				}
    		
    				if (value instanceof InputStream) {
    					dos.write((key + "=").getBytes());
    					InputStream is = InputStream.class.cast(value);
    					byte[] data = new byte[is.available()];
    					is.read(data);
    					dos.write(URLEncoder.encode(Base64.encodeToString(data, data.length), "UTF-8").getBytes());
    					
    					is.close();
    				} else { 
    					dos.write((key + "=" + URLEncoder.encode(String.valueOf(value), "UTF-8")).getBytes());
    				}
    				
    				dos.write("&".getBytes());
    			}
    		}
    
    		dos.flush();
    		dos.close();
    		int resultCode = connection.getResponseCode();
    		StringBuilder response = new StringBuilder();
    		if (resultCode == HttpURLConnection.HTTP_OK) {
    			BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
    			String line;
    			while ((line = br.readLine()) != null) {
    				response.append(line);
    			}
    			
    			br.close();
    		} else {
    			response.append(resultCode);
    		}
    		return response.toString();
    	}

本文采用把图片转换为base64格式进行传输，其代码如下：

public static String getBase64ImageEncode(Bitmap myImage) {
    		Bitmap bmSmall = Bitmap.createBitmap(myImage, 0, 0, myImage.getWidth(), myImage.getHeight());
    		ByteArrayOutputStream stream = new ByteArrayOutputStream();
    		bmSmall.compress(Bitmap.CompressFormat.JPEG, 100, stream);
    		byte[] arrays = stream.toByteArray();
    		// base64 encode
    		byte[] encode = Base64.encode(arrays, Base64.DEFAULT);
    		String base64Encode = new String(encode);
    		return base64Encode;
    	}

界面布局文件代码（activity_main.xml文件）：

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/bg" >
        <LinearLayout
            android:id="@+id/ll_fregment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical" >
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:orientation="horizontal" >
            <RadioGroup
                android:layout_width="match_parent"
                android:layout_height="50dp"
                android:orientation="horizontal" >
                <RadioButton
                    android:id="@+id/ib_main_face"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:background="@drawable/rb_select"
                    android:button="@null"
                    android:checked="true"
                    android:gravity="center"
                    android:onClick="change"
                    android:text="人脸识别" />
                <RadioButton
                    android:id="@+id/ib_main_gesture"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:background="@drawable/rb_select"
                    android:button="@null"
                    android:gravity="center"
                    android:onClick="change"
                    android:text="手势识别" />
                <RadioButton
                    android:id="@+id/ib_main_other"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:background="@drawable/rb_select"
                    android:button="@null"
                    android:gravity="center"
                    android:onClick="change"
                    android:text="其他功能" />
                
            </RadioGroup>
        </LinearLayout>
    
    </RelativeLayout>

人脸识别界面代码：

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    	
    	<TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="人脸识别"
            android:textSize="20sp" />
        <ImageView
            android:id="@+id/iv_face"
            android:layout_width="200dp"
            android:layout_height="300dp"
            android:layout_alignParentTop="true"
            android:layout_centerHorizontal="true"
            android:contentDescription="人脸图片"
            android:paddingTop="40dp"
            android:src="@drawable/defualt" />
        <LinearLayout
            android:id="@+id/ll_button"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/iv_face"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:gravity="center_horizontal"
            android:orientation="horizontal" >
            <Button
                android:id="@+id/ib_face_enter"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/enter"
                android:text="确定" />
            <Button
                android:id="@+id/ib_face_choice"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/choose"
                android:text="选择图片" />
        </LinearLayout>
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_below="@id/ll_button"
            android:orientation="horizontal"
            android:paddingTop="20dp" >
            <TextView
                android:id="@+id/tv_face_gender"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:gravity="center"
                android:src="@drawable/ic_launcher"
                android:text="性别"
                android:textSize="20sp" />
            <TextView
                android:id="@+id/tv_face_age"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:gravity="center"
                android:src="@drawable/ic_launcher"
                android:text="年龄"
                android:textSize="20sp" />
            <TextView
                android:id="@+id/tv_face_beauty"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:gravity="center"
                android:src="@drawable/ic_launcher"
                android:text="颜值"
                android:textSize="20sp" />
        </LinearLayout>
        <com.wllfengshu.util.GifView
            android:id="@+id/gif"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:layout_centerHorizontal="true"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="60dp"
            android:enabled="false" />
    </RelativeLayout>

人脸识别界面：

本文还有一些其他的封装函数，由于篇幅问题不一一粘贴，请大家自行下载本文代码案例：  
下载地址：http://download.csdn.net/download/tiandixuanwuliang/9984027

[Center]: /images/20220608/96882ed1902c4e02bceecce1c8f727cc.png
[Image 1]: 
[Center 1]: /images/20220608/7b7098ef621e4b61b7619e98c650ca26.png
[Center 2]: /images/20220608/dfc9c13b72714209940b7f416ab08ec8.png
[Center 3]: /images/20220608/6ff8b5bc601d40978239d14c80a041c9.png