Added face datection Android sample

samples/android/face-detection/.classpath

+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="src" path="gen"/>
+	<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>
+	<classpathentry kind="src" path="OpenCV-2.3.1_src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

samples/android/face-detection/.project

+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Sample - face-detection</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.ResourceManagerBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.PreCompilerBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>com.android.ide.eclipse.adt.ApkBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>com.android.ide.eclipse.adt.AndroidNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+	<linkedResources>
+		<link>
+			<name>OpenCV-2.3.1_src</name>
+			<type>2</type>
+			<locationURI>_android_OpenCV_2_3_1_df28900a/src</locationURI>
+		</link>
+	</linkedResources>
+</projectDescription>

samples/android/face-detection/.settings/org.eclipse.jdt.core.prefs

+#Wed Jun 29 04:36:40 MSD 2011
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+org.eclipse.jdt.core.compiler.compliance=1.5
+org.eclipse.jdt.core.compiler.source=1.5

samples/android/face-detection/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      package="org.opencv.samples.fd"
+      android:versionCode="1"
+      android:versionName="1.0">
+
+    <supports-screens android:resizeable="true"
+                      android:smallScreens="true" 
+                      android:normalScreens="true" 
+                      android:largeScreens="true" 
+                      android:anyDensity="true" />
+
+    <application android:label="@string/app_name" android:icon="@drawable/icon">
+        <activity android:name="FdActivity"
+                  android:label="@string/app_name"
+                  android:screenOrientation="landscape"
+                  android:configChanges="keyboardHidden|orientation">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+    
+    <uses-sdk android:minSdkVersion="8" />
+
+    <uses-permission android:name="android.permission.CAMERA"/>
+    <uses-feature android:name="android.hardware.camera" />
+    <uses-feature android:name="android.hardware.camera.autofocus" />
+
+</manifest> 

samples/android/face-detection/default.properties

+android.library.reference.1=../../OpenCV-2.3.1
+# Project target.
+target=android-8

samples/android/face-detection/res/values/strings.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">OpenCV Sample - face-detection</string>
+</resources>

samples/android/face-detection/src/org/opencv/samples/fd/FdActivity.java

+package org.opencv.samples.fd;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.Window;
+
+public class FdActivity extends Activity {
+    private static final String TAG         = "Sample::Activity";
+
+    private MenuItem            mItemFace50;
+    private MenuItem            mItemFace40;
+    private MenuItem            mItemFace30;
+    private MenuItem            mItemFace20;
+
+    public static float         minFaceSize = 0.5f;
+
+    public FdActivity() {
+        Log.i(TAG, "Instantiated new " + this.getClass());
+    }
+
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        Log.i(TAG, "onCreate");
+        super.onCreate(savedInstanceState);
+        requestWindowFeature(Window.FEATURE_NO_TITLE);
+        setContentView(new FdView(this));
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        Log.i(TAG, "onCreateOptionsMenu");
+        mItemFace50 = menu.add("Face size 50%");
+        mItemFace40 = menu.add("Face size 40%");
+        mItemFace30 = menu.add("Face size 30%");
+        mItemFace20 = menu.add("Face size 20%");
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        Log.i(TAG, "Menu Item selected " + item);
+        if (item == mItemFace50)
+            minFaceSize = 0.5f;
+        else if (item == mItemFace40)
+            minFaceSize = 0.4f;
+        else if (item == mItemFace30)
+            minFaceSize = 0.3f;
+        else if (item == mItemFace20)
+            minFaceSize = 0.2f;
+        return true;
+    }
+}

samples/android/face-detection/src/org/opencv/samples/fd/FdView.java

+package org.opencv.samples.fd;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.LinkedList;
+import java.util.List;
+
+import org.opencv.*;
+import org.opencv.objdetect.CascadeClassifier;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.util.Log;
+import android.view.SurfaceHolder;
+
+class FdView extends SampleCvViewBase {
+    private static final String TAG = "Sample::FdView";
+    private Mat                 mRgba;
+    private Mat                 mGray;
+
+    private CascadeClassifier   mCascade;
+
+    public FdView(Context context) {
+        super(context);
+
+        try {
+            InputStream is = context.getResources().openRawResource(R.raw.lbpcascade_frontalface);
+            File cascadeDir = context.getDir("cascade", Context.MODE_PRIVATE);
+            File cascadeFile = new File(cascadeDir, "lbpcascade_frontalface.xml");
+            FileOutputStream os = new FileOutputStream(cascadeFile);
+
+            byte[] buffer = new byte[4096];
+            int bytesRead;
+            while ((bytesRead = is.read(buffer)) != -1) {
+                os.write(buffer, 0, bytesRead);
+            }
+            is.close();
+            os.close();
+
+            mCascade = new CascadeClassifier(cascadeFile.getAbsolutePath());
+            if (mCascade.empty()) {
+                Log.e(TAG, "Failed to load cascade classifier");
+                mCascade = null;
+            } else
+                Log.i(TAG, "Loaded cascade classifier from " + cascadeFile.getAbsolutePath());
+
+            cascadeFile.delete();
+            cascadeDir.delete();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+            Log.e(TAG, "Failed to load cascade. Exception thrown: " + e);
+        }
+    }
+
+    @Override
+    public void surfaceChanged(SurfaceHolder _holder, int format, int width, int height) {
+        super.surfaceChanged(_holder, format, width, height);
+
+        synchronized (this) {
+            // initialize Mats before usage
+            mGray = new Mat();
+            mRgba = new Mat();
+        }
+    }
+
+    @Override
+    protected Bitmap processFrame(VideoCapture capture) {
+        capture.retrieve(mRgba, highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA);
+        capture.retrieve(mGray, highgui.CV_CAP_ANDROID_GREY_FRAME);
+
+        if (mCascade != null) {
+            int height = mGray.rows();
+            int faceSize = Math.round(height * FdActivity.minFaceSize);
+            List<Rect> faces = new LinkedList<Rect>();
+            mCascade.detectMultiScale(mGray, faces, 1.1, 2, 2 // TODO: objdetect.CV_HAAR_SCALE_IMAGE
+                    , new Size(faceSize, faceSize));
+
+            for (Rect r : faces)
+                core.rectangle(mRgba, r.tl(), r.br(), new Scalar(0, 255, 0, 255), 3);
+        }
+
+        Bitmap bmp = Bitmap.createBitmap(mRgba.cols(), mRgba.rows(), Bitmap.Config.ARGB_8888);
+
+        if (android.MatToBitmap(mRgba, bmp))
+            return bmp;
+
+        bmp.recycle();
+        return null;
+    }
+
+    @Override
+    public void run() {
+        super.run();
+
+        synchronized (this) {
+            // Explicitly deallocate Mats
+            if (mRgba != null)
+                mRgba.dispose();
+            if (mGray != null)
+                mGray.dispose();
+
+            mRgba = null;
+            mGray = null;
+        }
+    }
+}
\ No newline at end of file

samples/android/face-detection/src/org/opencv/samples/fd/SampleCvViewBase.java

+package org.opencv.samples.fd;
+
+import java.util.List;
+
+import org.opencv.*;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.util.Log;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+
+public abstract class SampleCvViewBase extends SurfaceView implements SurfaceHolder.Callback, Runnable {
+    private static final String TAG = "Sample::SurfaceView";
+
+    private SurfaceHolder       mHolder;
+    private VideoCapture        mCamera;
+
+    public SampleCvViewBase(Context context) {
+        super(context);
+        mHolder = getHolder();
+        mHolder.addCallback(this);
+        Log.i(TAG, "Instantiated new " + this.getClass());
+    }
+
+    public void surfaceChanged(SurfaceHolder _holder, int format, int width, int height) {
+        Log.i(TAG, "surfaceCreated");
+        synchronized (this) {
+            if (mCamera != null && mCamera.isOpened()) {
+                Log.i(TAG, "before mCamera.getSupportedPreviewSizes()");
+                List<Size> sizes = mCamera.getSupportedPreviewSizes();
+                Log.i(TAG, "after mCamera.getSupportedPreviewSizes()");
+                int mFrameWidth = width;
+                int mFrameHeight = height;
+
+                // selecting optimal camera preview size
+                {
+                    double minDiff = Double.MAX_VALUE;
+                    for (Size size : sizes) {
+                        if (Math.abs(size.height - height) < minDiff) {
+                            mFrameWidth = (int) size.width;
+                            mFrameHeight = (int) size.height;
+                            minDiff = Math.abs(size.height - height);
+                        }
+                    }
+                }
+
+                mCamera.set(highgui.CV_CAP_PROP_FRAME_WIDTH, mFrameWidth);
+                mCamera.set(highgui.CV_CAP_PROP_FRAME_HEIGHT, mFrameHeight);
+            }
+        }
+    }
+
+    public void surfaceCreated(SurfaceHolder holder) {
+        Log.i(TAG, "surfaceCreated");
+        mCamera = new VideoCapture(highgui.CV_CAP_ANDROID);
+        if (mCamera.isOpened()) {
+            (new Thread(this)).start();
+        } else {
+            mCamera.release();
+            mCamera = null;
+            Log.e(TAG, "Failed to open native camera");
+        }
+    }
+
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        Log.i(TAG, "surfaceDestroyed");
+        if (mCamera != null) {
+            synchronized (this) {
+                mCamera.release();
+                mCamera = null;
+            }
+        }
+    }
+
+    protected abstract Bitmap processFrame(VideoCapture capture);
+
+    public void run() {
+        Log.i(TAG, "Starting processing thread");
+        while (true) {
+            Bitmap bmp = null;
+
+            synchronized (this) {
+                if (mCamera == null)
+                    break;
+
+                if (!mCamera.grab()) {
+                    Log.e(TAG, "mCamera.grab() failed");
+                    break;
+                }
+
+                bmp = processFrame(mCamera);
+            }
+
+            if (bmp != null) {
+                Canvas canvas = mHolder.lockCanvas();
+                if (canvas != null) {
+                    canvas.drawBitmap(bmp, (canvas.getWidth() - bmp.getWidth()) / 2, (canvas.getHeight() - bmp.getHeight()) / 2, null);
+                    mHolder.unlockCanvasAndPost(canvas);
+                }
+                bmp.recycle();
+            }
+        }
+
+        Log.i(TAG, "Finishing processing thread");
+    }
+}
\ No newline at end of file

samples/android/image-manipulations/res/values/strings.xml

 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">OpenCV sample - image-manipulations</string>
+    <string name="app_name">OpenCV Sample - image-manipulations</string>
 </resources>

samples/android/image-manipulations/src/org/opencv/samples/imagemanipulations/ImageManipulationsView.java

@@ -139,6 +139,16 @@ class ImageManipulationsView extends SampleCvViewBase {
 
         synchronized (this) {
             // Explicitly deallocate Mats
+        	if (mZoomWindow != null)
+        		mZoomWindow.dispose();
+        	if (mZoomCorner != null)
+        		mZoomCorner.dispose();
+        	if (mBlurWindow != null)
+        		mBlurWindow.dispose();
+        	if (mGrayInnerWindow != null)
+        		mGrayInnerWindow.dispose();
+        	if (mRgbaInnerWindow != null)
+        		mRgbaInnerWindow.dispose();
             if (mRgba != null)
                 mRgba.dispose();
             if (mGray != null)
@@ -149,6 +159,11 @@ class ImageManipulationsView extends SampleCvViewBase {
             mRgba = null;
             mGray = null;
             mIntermediateMat = null;
+            mRgbaInnerWindow = null;
+            mGrayInnerWindow = null;
+            mBlurWindow = null;
+            mZoomCorner = null;
+            mZoomWindow = null;
         }
     }
 }
\ No newline at end of file