Hello everyone!
It's my first time with opencCV and I'm trying to get the phone's camera to recognize a stored object whose image is stored in the assets folder.
When I find that objection, I want you to launch a new activty. My problem is that it launches the activity always, as soon as the camera appears it launches the new activity, so the match it makes is not very good.
I leave the code, thanks:
public class Main3Activity extends Activity implements CameraBridgeViewBase.CvCameraViewListener2 {
private static final String TAG = "OCVSample::Activity";
private int w, h;
private CameraBridgeViewBase mOpenCvCameraView;
TextView tvName;
Scalar RED = new Scalar(255, 0, 0);
Scalar GREEN = new Scalar(0, 255, 0);
FeatureDetector detector;
DescriptorExtractor descriptor;
DescriptorMatcher matcher;
Mat descriptors2,descriptors1;
Mat img1;
MatOfKeyPoint keypoints1,keypoints2;
static {
if (!OpenCVLoader.initDebug())
Log.d("ERROR", "Unable to load OpenCV");
else
Log.d("SUCCESS", "OpenCV loaded");
}
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS: {
Log.i(TAG, "OpenCV loaded successfully");
mOpenCvCameraView.enableView();
try {
initializeOpenCVDependencies();
} catch (IOException e) {
e.printStackTrace();
}
}
break;
default: {
super.onManagerConnected(status);
}
break;
}
}
};
private void initializeOpenCVDependencies() throws IOException {
mOpenCvCameraView.enableView();
detector = FeatureDetector.create(FeatureDetector.ORB);
descriptor = DescriptorExtractor.create(DescriptorExtractor.ORB);
matcher = DescriptorMatcher.create(DescriptorMatcher.BRUTEFORCE_HAMMING);
img1 = new Mat();
AssetManager assetManager = getAssets();
InputStream istr = assetManager.open("ajustes.png");
Bitmap bitmap = BitmapFactory.decodeStream(istr);
Utils.bitmapToMat(bitmap, img1);
Imgproc.cvtColor(img1, img1, Imgproc.COLOR_RGB2GRAY);
img1.convertTo(img1, 0); //converting the image to match with the type of the cameras image
descriptors1 = new Mat();
keypoints1 = new MatOfKeyPoint();
detector.detect(img1, keypoints1);
descriptor.compute(img1, keypoints1, descriptors1);
}
public Main3Activity() {
Log.i(TAG, "Instantiated new " + this.getClass());
}
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "called onCreate");
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_main3);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.tutorial1_activity_java_surface_view);
mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
mOpenCvCameraView.setCvCameraViewListener(this);
tvName = (TextView) findViewById(R.id.text1);
}
@Override
public void onPause() {
super.onPause();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
@Override
public void onResume() {
super.onResume();
if (!OpenCVLoader.initDebug()) {
Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback);
} else {
Log.d(TAG, "OpenCV library found inside package. Using it!");
mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
}
}
public void onDestroy() {
super.onDestroy();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
public void onCameraViewStarted(int width, int height) {
w = width;
h = height;
}
public void onCameraViewStopped() {
}
public Mat recognize(Mat aInputFrame) {
Imgproc.cvtColor(aInputFrame, aInputFrame, Imgproc.COLOR_RGB2GRAY);
descriptors2 = new Mat();
keypoints2 = new MatOfKeyPoint();
detector.detect(aInputFrame, keypoints2);
descriptor.compute(aInputFrame, keypoints2, descriptors2);
// Matching
MatOfDMatch matches = new MatOfDMatch();
if (img1.type() == aInputFrame.type()) {
matcher.match(descriptors1, descriptors2, matches);
} else {
return aInputFrame;
}
List<DMatch> matchesList = matches.toList();
Double max_dist = 0.0;
Double min_dist = 100.0;
for (int i = 0; i < matchesList.size(); i++) {
Double dist = (double) matchesList.get(i).distance;
if (dist < min_dist)
min_dist = dist;
if (dist > max_dist)
max_dist = dist;
}
LinkedList<DMatch> good_matches = new LinkedList<DMatch>();
for (int i = 0; i < matchesList.size(); i++) {
if (matchesList.get(i).distance <= (1.5 * min_dist))
good_matches.addLast(matchesList.get(i));
}
MatOfDMatch goodMatches = new MatOfDMatch();
goodMatches.fromList(good_matches);
Mat outputImg = new Mat();
MatOfByte drawnMatches = new MatOfByte();
if (aInputFrame.empty() || aInputFrame.cols() < 1 || aInputFrame.rows() < 1) {
return aInputFrame;
}
else
{
Intent intent = new Intent(this, Blanca.class);
startActivity(intent);
}
Features2d.drawMatches(img1, keypoints1, aInputFrame, keypoints2, goodMatches, outputImg, GREEN, RED, drawnMatches, Features2d.NOT_DRAW_SINGLE_POINTS);
Imgproc.resize(outputImg, outputImg, aInputFrame.size());
return outputImg;
}
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
return recognize(inputFrame.rgba());
}
}