Android 人脸识别开源框架 Fotoapparat |
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Android 人脸识别开源框架 Fotoapparat
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简单的集成可以参照：https://github.com/RedApparat/FaceDetector，基本的使用和介绍已经很易懂了。下面是整理的更为全面一些的学习总结。 下载github的源码之后，要到Example文件夹中去运行Demo项目，而不是-master那个层级的项目，如下图所示：
打开项目之后可以看到demo很简单，只有两个类：MainActivity和PermissionsDelegate这个运行时权限委托类，MainActivity的源码如下，由如下的代码可见，要启用人脸检测功能仅仅是调用了createFotoapparat（）这一个自定义函数： package io.fotoapparat.facedetector.example; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.View; import java.util.List; import io.fotoapparat.Fotoapparat; import io.fotoapparat.FotoapparatSwitcher; import io.fotoapparat.facedetector.Rectangle; import io.fotoapparat.facedetector.processor.FaceDetectorProcessor; import io.fotoapparat.facedetector.view.RectanglesView; import io.fotoapparat.parameter.LensPosition; import io.fotoapparat.view.CameraView; import static io.fotoapparat.log.Loggers.fileLogger; import static io.fotoapparat.log.Loggers.logcat; import static io.fotoapparat.log.Loggers.loggers; import static io.fotoapparat.parameter.selector.LensPositionSelectors.lensPosition; public class MainActivity extends AppCompatActivity { private final PermissionsDelegate permissionsDelegate = new PermissionsDelegate(this); private boolean hasCameraPermission; private CameraView cameraView; private RectanglesView rectanglesView; private FotoapparatSwitcher fotoapparatSwitcher; private Fotoapparat frontFotoapparat; private Fotoapparat backFotoapparat; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); cameraView = (CameraView) findViewById(R.id.camera_view); rectanglesView = (RectanglesView) findViewById(R.id.rectanglesView); hasCameraPermission = permissionsDelegate.hasCameraPermission(); if (hasCameraPermission) { cameraView.setVisibility(View.VISIBLE); } else { permissionsDelegate.requestCameraPermission(); } frontFotoapparat = createFotoapparat(LensPosition.FRONT); backFotoapparat = createFotoapparat(LensPosition.BACK); fotoapparatSwitcher = FotoapparatSwitcher.withDefault(backFotoapparat); View switchCameraButton = findViewById(R.id.switchCamera); switchCameraButton.setVisibility( canSwitchCameras() ? View.VISIBLE : View.GONE ); switchCameraButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { switchCamera(); } }); } private boolean canSwitchCameras() { return frontFotoapparat.isAvailable() == backFotoapparat.isAvailable(); } private Fotoapparat createFotoapparat(LensPosition position) { return Fotoapparat .with(this) .into(cameraView) .lensPosition(lensPosition(position)) .frameProcessor( FaceDetectorProcessor.with(this) .listener(new FaceDetectorProcessor.OnFacesDetectedListener() { @Override public void onFacesDetected(List faces) { Log.d("&&&", "Detected faces: " + faces.size()); rectanglesView.setRectangles(faces); } }) .build() ) .logger(loggers( logcat(), fileLogger(this) )) .build(); } private void switchCamera() { if (fotoapparatSwitcher.getCurrentFotoapparat() == frontFotoapparat) { fotoapparatSwitcher.switchTo(backFotoapparat); } else { fotoapparatSwitcher.switchTo(frontFotoapparat); } } @Override protected void onStart() { super.onStart(); if (hasCameraPermission) { fotoapparatSwitcher.start(); } } @Override protected void onStop() { super.onStop(); if (hasCameraPermission) { fotoapparatSwitcher.stop(); } } @Override public void onRequestPermissionsResult(int requestCode, |
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