package org.opencv.samples.tutorial1;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.CameraBridgeViewBase;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;
import org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.*;
import org.opencv.highgui.Highgui;
import org.opencv.imgproc.Imgproc;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import com.example.imgloader.R;
import java.util.ArrayList;
import java.util.List;
public class Tutorial1Activity extends Activity implements CvCameraViewListener2 {
private static final String TAG = "OCVSample::Activity";
private Mat mRgba;
private Mat mGray;
private Mat fin;
private CameraBridgeViewBase mOpenCvCameraView;
Scalar min=new Scalar(0,30,60,0);
Scalar max=new Scalar(20,150,255,0);
Mat pointMatHsv;
Mat heirarchy;
Scalar CONTOUR_COLOR = new Scalar(255,0,0);
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();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
public Tutorial1Activity() {
Log.i(TAG, "Instantiated new " + this.getClass());
}
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "called onCreate");
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.tutorial1_surface_view);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.tutorial1_activity_java_surface_view);
mOpenCvCameraView.setMaxFrameSize(720, 480);
mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
mOpenCvCameraView.setCvCameraViewListener(this);
}
@Override
public void onPause()
{
super.onPause();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
@Override
public void onResume()
{
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mLoaderCallback);
}
public void onDestroy() {
super.onDestroy();
if (mOpenCvCameraView != null)
mOpenCvCameraView.disableView();
}
public void onCameraViewStarted(int width, int height) {
mGray = new Mat();
mRgba = new Mat();
pointMatHsv = new Mat(1, 1, CvType.CV_8UC3);
heirarchy=new Mat();
}
public void onCameraViewStopped() {
}
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
mRgba = inputFrame.rgba();
List contours =new ArrayList();
List hull = new ArrayList();
Imgproc.cvtColor(mRgba, mGray, Imgproc.COLOR_RGB2HSV);
Core.inRange(mGray, min, max, mRgba);
Imgproc.dilate(mRgba, mRgba, Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(2, 2)));
//Imgproc.dilate(mRgba, mRgba, Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(2, 2)));
Imgproc.erode(mRgba, mRgba, Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size(2, 2)));
mRgba.copyTo(pointMatHsv);
contours=retContours(pointMatHsv);
Imgproc.drawContours(pointMatHsv,contours,-1,CONTOUR_COLOR);
return mRgba;
}
public List retContours(Mat pointMatHsv)
{
List contours =new ArrayList();
Imgproc.findContours(pointMatHsv, contours, heirarchy, Imgproc.RETR_TREE, Imgproc.CHAIN_APPROX_NONE);
return contours;
}
}
the program executes perfectly but the contours are not drawn in the image. please help
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