I want to detect image keypoints. I tried the following code with differents feature detectors from the OpenCV library.
It work for ORB , BRISK , FAST , etc. But not for SURF/SIFT and even MSER detector !
public class ReadImaageActivity extends ActionBarActivity {
Mat image ; File fileimage ;
TimePicker time ;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i("activity", "OpenCV loaded successfully");
fileimage = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/7.jpg");
if (fileimage.exists())
image = Highgui.imread(fileimage.getAbsolutePath() ,Highgui.CV_LOAD_IMAGE_COLOR);
else Log.i("activity","dont exit") ;
//
long startTime = System.nanoTime();
FeatureDetector fd= FeatureDetector.create(FeatureDetector.SURF);
MatOfKeyPoint keypoints= new MatOfKeyPoint();
try
{
fd.detect(image, keypoints);
} catch (Exception e) {
e.printStackTrace();
}
long endTime = System.nanoTime();
long duration = (endTime - startTime)/1000000; //divide by 1000000 to get milliseconds.
if (!keypoints.empty())
{
Log.i("Keypoints", "is not empty");
System.out.println("duration"+""+duration);
System.out.println("size"+""+keypoints.size());
}
else
Log.i("Keypoints", "is not empty");
/*
Mat descriptors=new Mat();
DescriptorExtractor dex =DescriptorExtractor.create(DescriptorExtractor.SURF);
{
dex.compute(image, keypoints, descriptors);
long endTime = System.nanoTime();
long duration = (endTime - startTime)/1000000; //divide by 1000000 to get milliseconds.
System.out.println(descriptors.size());
System.out.println("duration"+duration);
}
else System.out.println("a3");
*/
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
@SuppressLint("NewApi") @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_read_imaage);
}
@Override
public void onResume()
{
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_9, this, mLoaderCallback);
}
}
It is because SURF and SIFT algorithms are not supported?