Android+Camera+SurfaceView自定義相機系列在這篇文章中已經介紹了如何使用camera+surfaceview
在此基礎上我們介紹如何接入虹軟的人臉識別功能。首先自己去注冊虹軟的開發者賬號,並自行下載SDK,SDK的APP_ID和SDK_KEY是唯一的,可以激活一台設備,完成認證后,可以用於激活100台設備。
一、SDK接入配置
1、在官方文檔中可以看到主要將幾個jar包和幾個so文件接入到你的項目目錄下。完成這步就算完成了接入SDK。
2、激活引擎
我們在自定義的camera的項目中,將激活與初始化封裝起來,重新寫init()函數

private void init() { /* * 激活 * */ String APP_ID = "換成自己的ID"; String SDK_KEY = "換成自己的key"; int code = FaceEngine.activeOnline(MainActivity_l.this, APP_ID, SDK_KEY); if (code == ErrorInfo.MOK) { Log.i(TAG, "activeOnline success"); Toast.makeText(MainActivity_l.this, "激活成功", Toast.LENGTH_SHORT).show(); } else if (code == ErrorInfo.MERR_ASF_ALREADY_ACTIVATED) { Log.i(TAG, "already activated"); Toast.makeText(MainActivity_l.this, "已經激活", Toast.LENGTH_SHORT).show(); } else { Log.i(TAG, "activeOnline failed, code is : " + code); } /* * 初始化 * */ faceEngine = new FaceEngine(); // int code_init = faceEngine.init(getApplicationContext(),DetectMode.ASF_DETECT_MODE_VIDEO, DetectFaceOrientPriority.ASF_OP_0_ONLY, scale,maxFaceNum, initMask); int code_init = faceEngine.init(getApplicationContext(), DetectMode.ASF_DETECT_MODE_VIDEO, DetectFaceOrientPriority.ASF_OP_ALL_OUT, scale, maxFaceNum, initMask); if (code_init != ErrorInfo.MOK) { Toast.makeText(this, "init failed, code is : " + code, Toast.LENGTH_SHORT).show(); } else { Log.i(TAG, "init success"); Toast.makeText(MainActivity_l.this, "初始化成功", Toast.LENGTH_SHORT).show(); } }
這樣我們就完成了如何激活與初始化
3、屬性檢測
我們使用虹軟SDK主要是使用他進行人臉追蹤和人臉識別等功能,比如畫人臉框,顯示性別,年齡,人臉數,是否活體等功能,所以我們繼續在init()添加功能

/* * 檢測屬性 * */ Camera camera = CameraUtils.getmCamera(); camera.setDisplayOrientation(90); DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics); final Camera.Parameters parameters = camera.getParameters(); parameters.setPreviewFormat(ImageFormat.NV21); camera.setParameters(parameters); camera.setPreviewCallback(new Camera.PreviewCallback() { @Override public void onPreviewFrame(byte[] nv21, Camera camera) { // 這里面的Bytes的數據就是NV21格式的數據 previewSize = camera.getParameters().getPreviewSize(); /* * 顯示人臉個數 * */ faceInfoList = new ArrayList<>(); // long start = System.currentTimeMillis(); int code = faceEngine.detectFaces(nv21, previewSize.width, previewSize.height, FaceEngine.CP_PAF_NV21, faceInfoList); if (code == ErrorInfo.MOK && faceInfoList.size() > 0) { Log.i(TAG, "detectFaces, face num is : " + faceInfoList.size()); // Toast.makeText(MainActivity.this,"檢測成功",Toast.LENGTH_SHORT).show(); } else { Log.i(TAG, "no face detected, code is : " + code); // Toast.makeText(MainActivity.this,"檢測失敗",Toast.LENGTH_SHORT).show(); } face_num.setText("人臉數:" + faceInfoList.size()); /* * 顯示年齡 * */ processMask = FaceEngine.ASF_AGE | FaceEngine.ASF_GENDER | FaceEngine.ASF_FACE3DANGLE | FaceEngine.ASF_LIVENESS; int faceProcessCode = faceEngine.process(nv21, previewSize.width, previewSize.height, FaceEngine.CP_PAF_NV21, faceInfoList, processMask); if (faceProcessCode == ErrorInfo.MOK) { Log.i(TAG, "process success"); // Toast.makeText(MainActivity.this,"屬性成功",Toast.LENGTH_SHORT).show(); } else { Log.i(TAG, "process failed, code is : " + faceProcessCode); // Toast.makeText(MainActivity.this,"屬性失敗",Toast.LENGTH_SHORT).show(); } List<AgeInfo> ageInfoList = new ArrayList<>(); int ageCode = faceEngine.getAge(ageInfoList); // 獲取第一個人臉的年齡信息,多人臉情況進行循環即可 if (ageCode == ErrorInfo.MOK && ageInfoList.size() > 0) { if (ageInfoList.size() > 0) { Log.i(TAG, "age of the first face is : " + ageInfoList.get(0).getAge()); // age.setText("年齡:"+ageInfoList.get(0).getAge()); } else { Log.i(TAG, "no face processed"); // age.setText("年齡:--"); } } else { Log.i(TAG, "get age failed, code is : " + ageCode); } if (ageInfoList.size() == 1) { age.setText("年齡:" + ageInfoList.get(0).getAge()); } if (ageInfoList.size() == 2){ age.setText("年齡:"+ageInfoList.get(0).getAge()+" ,"+ageInfoList.get(1).getAge()); } if (ageInfoList.size() == 0) { age.setText("年齡:--"); } /* * 顯示性別 * */ List<GenderInfo> genderInfoList = new ArrayList<>(); int genderCode = faceEngine.getGender(genderInfoList); // 獲取第一個人臉的性別信息,多人臉情況進行循環即可 if (genderCode == ErrorInfo.MOK) { if (genderInfoList.size() > 0) { Log.i(TAG, "gender of the first face is : " + genderInfoList.get(0).getGender()); } else { Log.i(TAG, "no face processed"); } } else { Log.i(TAG, "get gender failed, code is : " + genderCode); } if (genderInfoList.size() > 0 && genderInfoList.get(0).getGender() == 0) { gender.setText("年齡:M"); } if (genderInfoList.size() > 0 && genderInfoList.get(0).getGender() == 1) { gender.setText("年齡:F"); } if (genderInfoList.size() == 2 ){ gender.setText("年齡:"+gen(genderInfoList.get(0).getGender())+gen(genderInfoList.get(1).getGender())); } if (genderInfoList.size() == 0) { gender.setText("年齡:--"); } /* * 活體 * */ List<LivenessInfo> livenessInfoList = new ArrayList<>(); int livenessCode = faceEngine.getLiveness(livenessInfoList); // RGB活體不支持多人臉,因此只能拿第1個活體信息 if (livenessCode == ErrorInfo.MOK) { if (livenessInfoList.size() > 0) { Log.i(TAG, "liveness of the first face is : " + livenessInfoList.get(0).getLiveness()); } else { Log.i(TAG, "no face processed"); } } else { Log.i(TAG, "get liveness failed, code is : " + livenessCode); } if (livenessInfoList.size() > 0 && livenessInfoList.get(0).getLiveness() == 1) { liveness.setText("活體:Y"); } else { liveness.setText("活體:--"); } if (livenessInfoList.size() == 2 ){ liveness.setText("活體:"+Live(livenessInfoList.get(0).getLiveness())+Live(livenessInfoList.get(1).getLiveness())); }
所以寫完這些就完成了檢測人臉數,年齡等。在這里我們先是使用textView的方式將這些信息顯示在屏幕上。后面我們在移植虹軟的人臉識別框,就可以去掉這些代碼;
4、布局文件

<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity_l"> <FrameLayout android:id="@+id/layout_aspect" android:layout_width="match_parent" android:layout_height="wrap_content"> </FrameLayout> <com.example.camera.widget.FaceRectView android:id="@+id/face_rect_view" android:layout_width="match_parent" android:layout_height="match_parent" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_gravity="top" android:gravity="center"> <TextView android:id="@+id/face_num" android:layout_width="100dp" android:layout_height="50dp" android:text="人臉數:--" android:textColor="#000000" /> <TextView android:id="@+id/age" android:layout_width="100dp" android:layout_height="50dp" android:layout_toRightOf="@id/face_num" android:text="年齡:--" android:textColor="#000000" /> <TextView android:id="@+id/gender" android:layout_width="100dp" android:layout_height="50dp" android:layout_toRightOf="@id/age" android:text="性別:--" android:textColor="#000000" /> <TextView android:id="@+id/liveness" android:layout_width="100dp" android:layout_height="50dp" android:layout_toRightOf="@id/gender" android:text="活體:--" android:textColor="#000000" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_gravity="bottom" android:gravity="center"> <Button android:id="@+id/btn_init" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="初始化" /> <Button android:id="@+id/btn_switch" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="切換相機" /> <Button android:id="@+id/btn_focus" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="focus" android:text="聚焦" /> <Button android:id="@+id/btn_facerect" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="facerect" android:text="人臉框" /> </LinearLayout> </FrameLayout>
我們在點擊初始化的按鈕的時候調用init()函數。就可以了
這些就是我們需要的虹軟的人臉識別SDK的基礎功能。完整的代碼下載鏈接:https://download.csdn.net/download/hequnwang10/14150596