ch.zhaw.facerecognition.Activities.RecognitionActivity.java Source code

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Here is the source code for ch.zhaw.facerecognition.Activities.RecognitionActivity.java

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/* Copyright 2016 Michael Sladoje and Mike Schlchli. All Rights Reserved.
    
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    
http://www.apache.org/licenses/LICENSE-2.0
    
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==============================================================================*/

package ch.zhaw.facerecognition.Activities;

import android.app.Activity;
import android.content.SharedPreferences;
import android.hardware.camera2.params.Face;
import android.os.Bundle;
import android.os.Looper;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.SurfaceView;
import android.view.View;
import android.view.WindowManager;
import android.widget.ProgressBar;

import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.JavaCameraView;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.Rect;

import java.io.File;
import java.util.List;

import ch.zhaw.facerecognitionlibrary.FaceRecognitionLibrary;
import ch.zhaw.facerecognitionlibrary.Helpers.FileHelper;
import ch.zhaw.facerecognitionlibrary.Helpers.MatOperation;
import ch.zhaw.facerecognitionlibrary.Helpers.PreferencesHelper;
import ch.zhaw.facerecognitionlibrary.PreProcessor.PreProcessorFactory;
import ch.zhaw.facerecognition.R;
import ch.zhaw.facerecognitionlibrary.Recognition.Recognition;
import ch.zhaw.facerecognitionlibrary.Recognition.RecognitionFactory;

public class RecognitionActivity extends Activity implements CameraBridgeViewBase.CvCameraViewListener2 {
    private JavaCameraView mRecognitionView;
    private static final String TAG = "Recognition";
    private FileHelper fh;
    private Recognition rec;
    private PreProcessorFactory ppF;
    private ProgressBar progressBar;
    private boolean front_camera;

    static {
        if (!OpenCVLoader.initDebug()) {
            // Handle initialization error
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        Log.i(TAG, "called onCreate");
        super.onCreate(savedInstanceState);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        setContentView(R.layout.recognition_layout);
        progressBar = (ProgressBar) findViewById(R.id.progressBar);
        fh = new FileHelper();
        File folder = new File(fh.getFolderPath());
        if (folder.mkdir() || folder.isDirectory()) {
            Log.i(TAG, "New directory for photos created");
        } else {
            Log.i(TAG, "Photos directory already existing");
        }
        mRecognitionView = (JavaCameraView) findViewById(R.id.RecognitionView);
        // Use camera which is selected in settings
        SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
        front_camera = sharedPref.getBoolean("key_front_camera", true);
        if (front_camera) {
            mRecognitionView.setCameraIndex(1);
        } else {
            mRecognitionView.setCameraIndex(-1);
        }
        mRecognitionView.setVisibility(SurfaceView.VISIBLE);
        mRecognitionView.setCvCameraViewListener(this);
    }

    @Override
    public void onPause() {
        super.onPause();
        if (mRecognitionView != null)
            mRecognitionView.disableView();
    }

    public void onDestroy() {
        super.onDestroy();
        if (mRecognitionView != null)
            mRecognitionView.disableView();
    }

    public void onCameraViewStarted(int width, int height) {
    }

    public void onCameraViewStopped() {
    }

    public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
        Mat imgRgba = inputFrame.rgba();
        Mat img = new Mat();
        imgRgba.copyTo(img);
        List<Mat> images = ppF.getProcessedImage(img);
        Rect[] faces = ppF.getFacesForRecognition();
        // Selfie / Mirror mode
        if (front_camera) {
            Core.flip(imgRgba, imgRgba, 1);
        }
        if (images == null || images.size() == 0 || faces == null || faces.length == 0
                || !(images.size() == faces.length)) {
            // skip
            return imgRgba;
        } else {
            faces = MatOperation.rotateFaces(imgRgba, faces, ppF.getAngleForRecognition());
            for (int i = 0; i < faces.length; i++) {
                MatOperation.drawRectangleAndLabelOnPreview(imgRgba, faces[i], rec.recognize(images.get(i), ""),
                        front_camera);
            }
            return imgRgba;
        }
    }

    @Override
    public void onResume() {
        super.onResume();

        ppF = new PreProcessorFactory();

        final android.os.Handler handler = new android.os.Handler(Looper.getMainLooper());
        Thread t = new Thread(new Runnable() {
            public void run() {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        progressBar.setVisibility(View.VISIBLE);
                    }
                });
                SharedPreferences sharedPref = PreferenceManager
                        .getDefaultSharedPreferences(getApplicationContext());
                String algorithm = sharedPref.getString("key_classification_method",
                        getResources().getString(R.string.eigenfaces));
                rec = RecognitionFactory.getRecognitionAlgorithm(Recognition.RECOGNITION, algorithm);
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        progressBar.setVisibility(View.GONE);
                    }
                });
            }
        });

        t.start();

        // Wait until Eigenfaces loading thread has finished
        try {
            t.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        mRecognitionView.enableView();
    }
}