Example usage for org.opencv.core Mat Mat

Introduction

In this page you can find the example usage for org.opencv.core Mat Mat.

Prototype

public Mat() 

Source Link

Usage

From source file:in.fabinpaul.sixthsense.ColorBlobDetectionFragment.java

License:Apache License

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
    mRgba = inputFrame.rgba();/*from w  w w .j a  v a2 s . co m*/
    Mat[] colorLabel = new Mat[4];
    org.opencv.core.Point markersXY[] = new org.opencv.core.Point[4];
    for (int i = 0; i < 4; i++) {

        colorLabel[i] = new Mat();

        if (mIsColorSelected[i]) {
            mDetector[i].process(mRgba);
            List<MatOfPoint> contours = mDetector[i].getContours();
            Log.e(TAG, "Contours count: " + contours.size());
            Imgproc.drawContours(mRgba, contours, -1, CONTOUR_COLOR);
            markersXY[i] = new org.opencv.core.Point();
            markersXY[i] = mDetector[i].getXY();
            Log.i(TAG, "Point:X" + markersXY[i].x + " Y:" + markersXY[i].y);
            switch (i) {
            case 0:
                colorLabel[i] = mRgba.submat(4, 68, 4, 68);
                break;
            case 1:
                colorLabel[i] = mRgba.submat(4, 68, mRgba.cols() - 68, mRgba.cols() - 4);
                break;
            case 2:
                colorLabel[i] = mRgba.submat(mRgba.rows() - 68, mRgba.rows() - 4, 4, 68);
                break;
            case 3:
                colorLabel[i] = mRgba.submat(mRgba.rows() - 68, mRgba.rows() - 4, mRgba.cols() - 68,
                        mRgba.cols() - 4);
                break;
            }
            colorLabel[i].setTo(mBlobColorRgba[i]);
        }
    }

    return mRgba;
}

---

From source file:in.fabinpaul.sixthsense.ColorBlobDetectionFragment.java

License:Apache License

@Override
public boolean onTouch(View v, MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        count++;//from   www .j a  v a  2s . c om
        if (count > 3)
            count = 0;

        if (count == 3) {
            colorMarkerSet = true;
            comm.saveButtonVisibility();
        }

        int cols = mRgba.cols();
        int rows = mRgba.rows();

        int xOffset = (mOpenCvCameraView.getWidth() - cols) / 2;
        int yOffset = (mOpenCvCameraView.getHeight() - rows) / 2;
        Log.i(TAG, "x coordinates" + event.getX() + "y coordinates" + event.getY());
        Log.i(TAG, "View width" + mOpenCvCameraView.getWidth() + "View Height" + mOpenCvCameraView.getHeight());

        int x = (int) event.getX() - xOffset;
        int y = (int) event.getY() - yOffset;

        if ((x < 0) || (y < 0) || (x > cols) || (y > rows))
            return false;

        Rect touchedRect = new Rect();

        touchedRect.x = (x > 4) ? x - 4 : 0;
        touchedRect.y = (y > 4) ? y - 4 : 0;

        touchedRect.width = (x + 4 < cols) ? x - 1 - touchedRect.x : cols - touchedRect.x;
        touchedRect.height = (y + 4 < rows) ? y - 1 - touchedRect.y : rows - touchedRect.y;

        Log.i(TAG, "Width" + touchedRect.width + " Height" + touchedRect.height);
        Log.i(TAG, "Column" + cols + " Rows" + rows);
        Log.i(TAG, "Touch image coordinates: (" + x + ", " + y + ")");

        Mat touchedRegionRgba = mRgba.submat(touchedRect);

        Mat touchedRegionHsv = new Mat();
        Imgproc.cvtColor(touchedRegionRgba, touchedRegionHsv, Imgproc.COLOR_RGB2HSV_FULL);

        // Calculate average color of touched region
        mBlobColorHsv[count] = Core.sumElems(touchedRegionHsv);
        int pointCount = touchedRect.width * touchedRect.height;
        for (int i = 0; i < mBlobColorHsv[count].val.length; i++)
            mBlobColorHsv[count].val[i] /= pointCount;

        mBlobColorRgba[count] = converScalarHsv2Rgba(mBlobColorHsv[count]);

        Log.i(TAG, "Before" + mBlobColorHsv[count].val[0] + " " + mBlobColorHsv[count].val[1] + " "
                + mBlobColorHsv[count].val[2]);
        Log.i(TAG, "After" + mBlobColorRgba[count].val[0] + " " + mBlobColorRgba[count].val[1] + " "
                + mBlobColorRgba[count].val[2]);

        Log.i(TAG, "Touched rgba color: (" + mBlobColorRgba[count].val[0] + ", " + mBlobColorRgba[count].val[1]
                + ", " + mBlobColorRgba[count].val[2] + ", " + mBlobColorRgba[count].val[3] + ")");

        // mDetector[count].setHsvColor(mBlobColorHsv[count]);
        setHSV(count);

        mIsColorSelected[count] = true;

        touchedRegionRgba.release();
        touchedRegionHsv.release();
    }
    return true; // don't need subsequent touch events
}

---

From source file:in.fabinpaul.sixthsense.ColorBlobDetectionFragment.java

License:Apache License

private Scalar converScalarHsv2Rgba(Scalar hsvColor) {
    Mat pointMatRgba = new Mat();
    Mat pointMatHsv = new Mat(1, 1, CvType.CV_8UC3, hsvColor);
    Imgproc.cvtColor(pointMatHsv, pointMatRgba, Imgproc.COLOR_HSV2RGB_FULL, 4);

    return new Scalar(pointMatRgba.get(0, 0));
}

---

From source file:in.fabinpaul.sixthsense.ColorBlobDetector.java

License:Apache License

public void process(Mat rgbaImage) {
    Imgproc.pyrDown(rgbaImage, mPyrDownMat);
    Imgproc.pyrDown(mPyrDownMat, mPyrDownMat);

    Imgproc.cvtColor(mPyrDownMat, mHsvMat, Imgproc.COLOR_RGB2HSV_FULL);

    Core.inRange(mHsvMat, mLowerBound, mUpperBound, mMask);
    Imgproc.dilate(mMask, mDilatedMask, new Mat());

    List<MatOfPoint> contours = new ArrayList<MatOfPoint>();

    Imgproc.findContours(mDilatedMask, contours, mHierarchy, Imgproc.RETR_EXTERNAL,
            Imgproc.CHAIN_APPROX_SIMPLE);

    // Find max contour area
    double maxArea = 0;
    Iterator<MatOfPoint> each = contours.iterator();
    while (each.hasNext()) {
        MatOfPoint wrapper = each.next();
        double area = Imgproc.contourArea(wrapper);
        if (area > maxArea)
            maxArea = area;/*  w ww  . ja va  2 s .  co m*/
    }

    // Filter contours by area and resize to fit the original image size
    mContours.clear();
    each = contours.iterator();
    while (each.hasNext()) {
        MatOfPoint contour = each.next();
        if (Imgproc.contourArea(contour) > mMinContourArea * maxArea) {
            Core.multiply(contour, new Scalar(4, 4), contour);
            mContours.add(contour);
        }
    }
}

---

From source file:info.jmfavreau.bifrostcore.imageprocessing.ImageToColor.java

License:Open Source License

public Scalar process(Bitmap bmp) {
    // convert the image to OpenCV format
    Log.d("bifrostcore", "create original image");
    Mat original_alpha = new Mat();
    Assert.assertNotNull(original_alpha);
    Utils.bitmapToMat(bmp, original_alpha);
    // remove alpha
    Mat original = new Mat();
    Imgproc.cvtColor(original_alpha, original, Imgproc.COLOR_RGBA2RGB, 0);
    Log.d("bifrostcore", "image size: " + String.valueOf(original.total()));

    // compute an ROI
    Mat roi = compute_roi(original);//from   w w w .ja  va2s  .c  o m

    Log.d("bifrostcore", "smooth image");
    // smooth the image
    Mat smoothed = smooth_image(original);

    Log.d("bifrostcore", "convert to hsv");
    Mat hsv = toHSV(smoothed);

    Log.d("bifrostcore", "extract main region");
    // extract main region using histogram
    Mat main_region = extract_main_region(hsv, roi);

    // threshold to preserve only the most significant regions
    Mat main_region_threshold = threshold_mask(main_region);
    saveImage(main_region_threshold);

    Log.d("bifrostcore", "return mean value");
    // return the mean value
    return Core.mean(original, main_region_threshold);
}

---

From source file:info.jmfavreau.bifrostcore.imageprocessing.ImageToColor.java

License:Open Source License

private Mat compute_roi(Mat original) {
    Mat roi = new Mat();
    Imgproc.cvtColor(original, roi, Imgproc.COLOR_BGR2GRAY, 0);
    roi.setTo(new Scalar(0, 0, 0));
    int x = original.width();
    int y = original.height();
    int cx = x / 2;
    int cy = y / 2;
    int r = Math.min(cx, cy) * 2 / 3;
    Core.circle(roi, new Point(cx, cy), r, new Scalar(255, 255, 255), -1, 8, 0);
    return roi;//from w w  w.  j  av a 2  s.  c  o  m
}

---

From source file:info.jmfavreau.bifrostcore.imageprocessing.ImageToColor.java

License:Open Source License

private Mat toHSV(Mat img) {
    Mat hsv = new Mat();
    Imgproc.cvtColor(img, hsv, Imgproc.COLOR_BGR2HSV);
    return hsv;
}

---

From source file:info.jmfavreau.bifrostcore.imageprocessing.ImageToColor.java

License:Open Source License

private Mat extract_main_region(Mat img, Mat roi) {
    Mat hist = new Mat();
    int h_bins = 30;
    int s_bins = 32;
    MatOfInt mHistSize = new MatOfInt(h_bins, s_bins);

    MatOfFloat mRanges = new MatOfFloat(0, 179, 0, 255);
    MatOfInt mChannels = new MatOfInt(0, 1);

    Imgproc.calcHist(Arrays.asList(img), mChannels, roi, hist, mHistSize, mRanges, false);

    Core.normalize(hist, hist, 0, 255, Core.NORM_MINMAX, -1, new Mat());

    Mat backproj = new Mat();
    Imgproc.calcBackProject(Arrays.asList(img), mChannels, hist, backproj, mRanges, 1);

    Log.w("bifrostcore",
            "Number of pixels in the biggest region: " + String.valueOf(Core.countNonZero(backproj)));
    return backproj.mul(roi);
}

---

From source file:interactivespaces.activity.image.vision.opencv.outline.ImageOpenCvVisionOutlineActivity.java

License:Apache License

/**
 * Detect all the edges in the image and make only the edges visible.
 *
 * @param image/*from  w  w  w .  ja  v  a  2 s .com*/
 *          the image to be processed
 * @param dst
 *          the destination image
 */
private void edgeify(Mat image, Mat dst) {
    Mat gray = new Mat();
    Imgproc.cvtColor(image, gray, Imgproc.COLOR_RGB2GRAY);

    Imgproc.medianBlur(gray, gray, BLUR_FILTER_SIZE);

    Mat edges = new Mat();
    Imgproc.Laplacian(gray, edges, CvType.CV_8U, LAPLACIAN_KERNEL_SIZE, 1, 0);

    Imgproc.threshold(edges, dst, EDGES_THRESHOLD, MAXIMUM_THRESHOLD_VALUE, Imgproc.THRESH_BINARY_INV);
}

---

From source file:interactivespaces.service.image.vision.opencv.OpenCvVideoLoop.java

License:Apache License

@Override
protected void loop() throws InterruptedException {
    Mat frame = new Mat();
    capture.grab();//from  w ww .  j a v  a2  s .  c  o m
    capture.retrieve(frame);
    if (frame.empty()) {
        log.warn("No image");
        return;
    }

    notifyListenersNewVideoFrame(frame);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• »