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POUnable to detect face using FaceDetector in android
 

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  1. POUnable to detect face using FaceDetector in android
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    <p>I need to detect the user face and also compare the face to authenticate my application,for that I used FaceDetector API to detect the user face.</p> <p>When i run my code it works without any defects.But it gives detected faces count as Zero.</p> <pre><code> public class AndroidFaceDetectorActivity extends Activity { private static final int TAKE_PICTURE_CODE = 100; private static final int MAX_FACES = 5; private Bitmap cameraBitmap = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ((Button)findViewById(R.id.take_picture)).setOnClickListener(btnClick); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(TAKE_PICTURE_CODE == requestCode){ processCameraImage(data); } } private void openCamera(){ Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(intent, TAKE_PICTURE_CODE); } private void processCameraImage(Intent intent){ setContentView(R.layout.detectlayout); ((Button)findViewById(R.id.detect_face)).setOnClickListener(btnClick); ImageView imageView = (ImageView)findViewById(R.id.image_view); cameraBitmap = (Bitmap)intent.getExtras().get("data"); imageView.setImageBitmap(cameraBitmap); } private void detectFaces(){ if(null != cameraBitmap){ Log.d("FACE_RECOGNITION","CHECK"); int width = cameraBitmap.getWidth(); int height = cameraBitmap.getHeight(); FaceDetector detector = new FaceDetector(width, height,AndroidFaceDetectorActivity.MAX_FACES); Face[] faces = new Face[AndroidFaceDetectorActivity.MAX_FACES]; Bitmap bitmap565 = Bitmap.createBitmap(width, height, Config.RGB_565); Paint ditherPaint = new Paint(); Paint drawPaint = new Paint(); ditherPaint.setDither(true); drawPaint.setColor(Color.RED); drawPaint.setStyle(Paint.Style.STROKE); drawPaint.setStrokeWidth(2); Canvas canvas = new Canvas(); canvas.setBitmap(bitmap565); canvas.drawBitmap(cameraBitmap, 0, 0, ditherPaint); int facesFound = detector.findFaces(bitmap565, faces); PointF midPoint = new PointF(); float eyeDistance = 0.0f; float confidence = 0.0f; Log.i("FaceDetector", "Number of faces found: " + facesFound); if(facesFound &gt; 0) { for(int index=0; index&lt;facesFound; ++index){ faces[index].getMidPoint(midPoint); eyeDistance = faces[index].eyesDistance(); confidence = faces[index].confidence(); Log.i("FaceDetector", "Confidence: " + confidence + ", Eye distance: " + eyeDistance + ", Mid Point: (" + midPoint.x + ", " + midPoint.y + ")"); canvas.drawRect((int)midPoint.x - eyeDistance , (int)midPoint.y - eyeDistance , (int)midPoint.x + eyeDistance, (int)midPoint.y + eyeDistance, drawPaint); } } String filepath = Environment.getExternalStorageDirectory() + "/facedetect" + System.currentTimeMillis() + ".jpg"; try { FileOutputStream fos = new FileOutputStream(filepath); bitmap565.compress(CompressFormat.JPEG, 90, fos); fos.flush(); fos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } ImageView imageView = (ImageView)findViewById(R.id.image_view); imageView.setImageBitmap(bitmap565); } } private View.OnClickListener btnClick = new View.OnClickListener() { //@Override public void onClick(View v) { switch(v.getId()){ case R.id.take_picture: openCamera(); break; case R.id.detect_face: detectFaces(); break; } } }; } </code></pre> <p>What i did wrong?</p> <p>or</p> <p>Is any other way to do that?</p> <p>Thanks</p>
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    1. COWhy no one here answer my question?
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    2. COHow did you build that cameraBitmap?
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    3. CO@AlexCohn:I've updated source code above.
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