Extraction Of Face From a Bitmap

Extraction Of Face From a Bitmap

After being given suggestions to use circular crop i implemented it in my
application to use to extract face from the bitmap but its too inefficient
i mean its of no use and similar to cropping from the rectangular face.
Now here is what i have done up til now:
Launched Camera
Taken Picture
Detected The face in the Picture
Painting a rectangular window in the area face has been detected
Now the serious issue am facing is getting face from that bitmap. I just
want to get the face. Ignore all the other details that were in the face
detection window. If it was matlab it could have been too simpler with the
help of edge detection techniques and segmentation algorithms and
function. I want to know how can i do the same process in android
application? plz do share the code snippets if u know of any. This is
taking too much of my time and i just want to get over with this face
extraction part.
Code i did till now:
public class Makeover 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(){
Bitmap bmFace = null;
if(null != cameraBitmap){
int width = cameraBitmap.getWidth();
int height = cameraBitmap.getHeight();
FaceDetector detector = new FaceDetector(width,
height,Makeover.MAX_FACES);
Face[] faces = new Face[Makeover.MAX_FACES];
Bitmap bitmap565 = Bitmap.createBitmap(width, height,
Config.RGB_565);
Paint ditherPaint = new Paint();
Paint drawPaint = new Paint();
//jo bhi krna hai ab bitmap565 k sath krna hai apse wo image hai main
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 > 0)
{
for(int index=0; index<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);
}
}
for(int count=0;count<detector.findFaces(bitmap565, faces);count++)
{
float left;
float top;
PointF midPoints=new PointF();
faces[count].getMidPoint(midPoint);
eyeDistance=faces[count].eyesDistance();
left = midPoint.x - (float)(1.4 * eyeDistance);
top = midPoint.y - (float)(1.8 * eyeDistance);
bmFace = Bitmap.createBitmap(cameraBitmap, (int) left, (int)
top, (int) (2.8 * eyeDistance), (int) (3.6 * eyeDistance));
}
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(bmFace);
}
}
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;
}
}
};
}