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Anyone here have tried implementing the chamerMatching method on android using opencv4android? I cant get it to work properly on my device galaxy tab 3 kitkat.

the application crashes as soon as I call the chamerMatching method.

here's the screenshot of the logcat from where the problem starts.

it seems like a memory problem.

I'm trying to create an application the will compute the similarity scores between two edge maps/matrices using the chamfer matching algorithm provided on the contrib folder of opencv 2.4.11.

heres my code.

public static float getScore(Mat img, Mat tpl)
{
    //System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

    if (img.empty() | tpl.empty())
    {
        System.out.println("Could not read image file.");
        return 0;
    }

    Imgproc.cvtColor(img, img, Imgproc.COLOR_BGR2GRAY);
    Imgproc.cvtColor(tpl, tpl, Imgproc.COLOR_BGR2GRAY);

    Mat cimg = new Mat(img.rows(), img.cols(), CvType.CV_8UC1);
    Imgproc.cvtColor(img, cimg, Imgproc.COLOR_GRAY2BGR);

    List<MatOfPoint> results = new Vector<>();
    MatOfFloat costs = new MatOfFloat();

    int best = Contrib.chamerMatching(img, tpl, results, costs);

    if (best < 0) {
        System.out.println("matching not found");
        return 0;
    }

    System.out.println("Chamfer Distance = " + costs.toList().get(best));

    for (int i =0; i < results.get(best).rows(); i++)
    {
        Core.circle(cimg, results.get(best).toArray()[i], 0, new Scalar(0,255,0));
    }

    int count_contour = Core.countNonZero(img);

    Imgproc.cvtColor(cimg, cimg, Imgproc.COLOR_BGR2GRAY);
    Imgproc.threshold(cimg, cimg, 150, 255, Imgproc.THRESH_BINARY);
    int count_white = Core.countNonZero(cimg);

    System.out.println("Contour = " + count_contour);
    System.out.println("White = " + count_white);


    float m = count_contour - count_white;
    float d = m / count_contour;
    float s = d * 100;

    return s;
}

Anyone here have tried implementing the chamerMatching method on android using opencv4android? I cant get it to work properly on my device galaxy tab 3 kitkat.

the application crashes as soon as I call the chamerMatching method.

here's the screenshot of the logcat from where the problem starts.

it seems like a memory problem.

I'm trying to create an application the will compute the similarity scores between two edge maps/matrices using the chamfer matching algorithm provided on the contrib folder of opencv 2.4.11.

heres my code.

public static float getScore(Mat img, Mat tpl)
{
    //System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

    if (img.empty() | tpl.empty())
    {
        System.out.println("Could not read image file.");
        return 0;
    }

    Imgproc.cvtColor(img, img, Imgproc.COLOR_BGR2GRAY);
    Imgproc.cvtColor(tpl, tpl, Imgproc.COLOR_BGR2GRAY);

    Mat cimg = new Mat(img.rows(), img.cols(), CvType.CV_8UC1);
    Imgproc.cvtColor(img, cimg, Imgproc.COLOR_GRAY2BGR);

    List<MatOfPoint> results = new Vector<>();
    MatOfFloat costs = new MatOfFloat();

    int best = Contrib.chamerMatching(img, tpl, results, costs);

    if (best < 0) {
        System.out.println("matching not found");
        return 0;
    }

    System.out.println("Chamfer Distance = " + costs.toList().get(best));

    for (int i =0; i < results.get(best).rows(); i++)
    {
        Core.circle(cimg, results.get(best).toArray()[i], 0, new Scalar(0,255,0));
    }

    int count_contour = Core.countNonZero(img);

    Imgproc.cvtColor(cimg, cimg, Imgproc.COLOR_BGR2GRAY);
    Imgproc.threshold(cimg, cimg, 150, 255, Imgproc.THRESH_BINARY);
    int count_white = Core.countNonZero(cimg);

    System.out.println("Contour = " + count_contour);
    System.out.println("White = " + count_white);


    float m = count_contour - count_white;
    float d = m / count_contour;
    float s = d * 100;

    return s;
}

easyBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v){

                    Mat img = new Mat(257,257, CvType.CV_8UC1);
                    Mat tpl = new Mat(257,257, CvType.CV_8UC1);

                    Bitmap imgBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo_in_clutter);
                    Bitmap tplBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo);

                    Utils.bitmapToMat(imgBitmap, img);
                    Utils.bitmapToMat(tplBitmap, tpl);

                    Log.i("CHAMFER TEST", "Score = " + ChamferTest.getScore(img, tpl));

                }
            });

Anyone here have tried implementing the chamerMatching method on android using opencv4android? I cant get it to work properly on my device galaxy tab 3 kitkat.

the application crashes as soon as I call the chamerMatching method.

here's the screenshot of the logcat from where the problem starts.

it seems like a memory problem.

I'm trying to create an application the will compute the similarity scores between two edge maps/matrices using the chamfer matching algorithm provided on the contrib folder of opencv 2.4.11.

heres my code.

public static float getScore(Mat img, Mat tpl)
{
    //System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

    if (img.empty() | tpl.empty())
    {
        System.out.println("Could not read image file.");
        return 0;
    }

    Imgproc.cvtColor(img, img, Imgproc.COLOR_BGR2GRAY);
    Imgproc.cvtColor(tpl, tpl, Imgproc.COLOR_BGR2GRAY);

    Mat cimg = new Mat(img.rows(), img.cols(), CvType.CV_8UC1);
    Imgproc.cvtColor(img, cimg, Imgproc.COLOR_GRAY2BGR);

    List<MatOfPoint> results = new Vector<>();
    MatOfFloat costs = new MatOfFloat();

    int best = Contrib.chamerMatching(img, tpl, results, costs);

    if (best < 0) {
        System.out.println("matching not found");
        return 0;
    }

    System.out.println("Chamfer Distance = " + costs.toList().get(best));

    for (int i =0; i < results.get(best).rows(); i++)
    {
        Core.circle(cimg, results.get(best).toArray()[i], 0, new Scalar(0,255,0));
    }

    int count_contour = Core.countNonZero(img);

    Imgproc.cvtColor(cimg, cimg, Imgproc.COLOR_BGR2GRAY);
    Imgproc.threshold(cimg, cimg, 150, 255, Imgproc.THRESH_BINARY);
    int count_white = Core.countNonZero(cimg);

    System.out.println("Contour = " + count_contour);
    System.out.println("White = " + count_white);


    float m = count_contour - count_white;
    float d = m / count_contour;
    float s = d * 100;

    return s;
}

heres the code that will call method getScore.

easyBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v){

                    Mat img = new Mat(257,257, CvType.CV_8UC1);
                    Mat tpl = new Mat(257,257, CvType.CV_8UC1);

                    Bitmap imgBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo_in_clutter);
                    Bitmap tplBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo);

                    Utils.bitmapToMat(imgBitmap, img);
                    Utils.bitmapToMat(tplBitmap, tpl);

                    Log.i("CHAMFER TEST", "Score = " + ChamferTest.getScore(img, tpl));

                }
            });