我正在尝试构建一个应用程序，可以检测设备相机拍摄的照片中面部的数量。目前，我拥有的代码如下所示。通过在这里研究该问题，我认为可能是由于图片分辨率太低导致FaceDetector存在问题，但如果是这种情况，我不确定如何解决该问题。如果不是这种情况，那么我不知道问题出在哪里。非常感谢您的任何帮助！
public class CrowdDetection extends Activity {
ImageView display;
ImageView pic;
Bitmap image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crowd_detection);
display = (ImageView) findViewById(R.id.imageView2);
Button takePicture = (Button) findViewById(R.id.button1);
takePicture.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 0);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
setContentView(R.layout.detect_faces);
pic = (ImageView) findViewById(R.id.imageView1);
image = (Bitmap) data.getExtras().get("data");
image = BitmapFactory.decodeFile(data.getData().getPath());
pic.setImageBitmap(image);
Button detect = (Button) findViewById(R.id.button2);
detect.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
detectFaces();
}
});
}
private void detectFaces() {
setContentView(R.layout.display_crowd);
int h = image.getHeight();
int w = image.getWidth();
int max = 10;
FaceDetector detector = new FaceDetector(w, h, max);
Face[] faces = new Face[max];
ImageView pic2 = (ImageView) findViewById(R.id.imageView3);
pic2.setImageBitmap(image);
int facesFound = detector.findFaces(image, faces);
TextView result = (TextView) findViewById(R.id.textView3);
if(facesFound>5){
result.setText("There are " + facesFound + " faces in this picture, therefore you have a crowd!");
}
else{
result.setText("There are only " + facesFound + " faces in this picture, therefore you do not have a crowd!");
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.crowd_detection, menu);
return true;
}
}
事先感谢您的帮助！