Example usage for org.opencv.core Mat create

Introduction

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

Prototype

public void create(int rows, int cols, int type) 

Source Link

Usage

From source file:com.trandi.opentld.tld.PatchGenerator.java

License:Apache License

/**
 * //from w  ww  .ja va2 s  .  co  m
 * @param srcCenter
 * @param dstCenter
 * @param transform OUTPUT
 * @param inverse
 */
private void generateRandomTransform(Point srcCenter, Point dstCenter, Mat transform, boolean inverse) {
    MatOfDouble tempRand = new MatOfDouble(0d, 0d);
    Core.randu(tempRand, lambdaMin, lambdaMax);
    final double[] rands = tempRand.toArray();
    final double lambda1 = rands[0];
    final double lambda2 = rands[1];
    Core.randu(tempRand, thetaMin, thetaMax);
    final double theta = tempRand.toArray()[0];
    Core.randu(tempRand, phiMin, phiMax);
    final double phi = tempRand.toArray()[0];

    // Calculate random parameterized affine transformation A,
    // A = T(patch center) * R(theta) * R(phi)' * S(lambda1, lambda2) * R(phi) * T(-pt)
    final double st = Math.sin(theta);
    final double ct = Math.cos(theta);
    final double sp = Math.sin(phi);
    final double cp = Math.cos(phi);
    final double c2p = cp * cp;
    final double s2p = sp * sp;

    final double A = lambda1 * c2p + lambda2 * s2p;
    final double B = (lambda2 - lambda1) * sp * cp;
    final double C = lambda1 * s2p + lambda2 * c2p;

    final double Ax_plus_By = A * srcCenter.x + B * srcCenter.y;
    final double Bx_plus_Cy = B * srcCenter.x + C * srcCenter.y;

    transform.create(2, 3, CvType.CV_64F);
    transform.put(0, 0, A * ct - B * st);
    transform.put(0, 1, B * ct - C * st);
    transform.put(0, 2, -ct * Ax_plus_By + st * Bx_plus_Cy + dstCenter.x);
    transform.put(1, 0, A * st + B * ct);
    transform.put(1, 1, B * st + C * ct);
    transform.put(1, 2, -st * Ax_plus_By - ct * Bx_plus_Cy + dstCenter.y);

    if (inverse) {
        Imgproc.invertAffineTransform(transform, transform);
    }
}

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From source file:de.vion.eyetracking.cameracalib.calibration.opencv.CameraCalibrator.java

private void calcBoardCornerPositions(Mat corners) {
    final int cn = 3;
    float positions[] = new float[this.mCornersSize * cn];

    for (int i = 0; i < this.mPatternSize.height; i++) {
        for (int j = 0; j < this.mPatternSize.width * cn; j += cn) {
            positions[(int) (i * this.mPatternSize.width * cn + j + 0)] = (2 * (j / cn) + i % 2)
                    * (float) this.mSquareSize;
            positions[(int) (i * this.mPatternSize.width * cn + j + 1)] = i * (float) this.mSquareSize;
            positions[(int) (i * this.mPatternSize.width * cn + j + 2)] = 0;
        }/*from ww w  .ja va2  s .  c o  m*/
    }
    corners.create(this.mCornersSize, 1, CvType.CV_32FC3);
    corners.put(0, 0, positions);
}

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From source file:de.vion.eyetracking.cameracalib.calibration.opencv.CameraCalibrator.java

private double computeReprojectionErrors(List<Mat> objectPoints, List<Mat> rvecs, List<Mat> tvecs,
        Mat perViewErrors) {
    MatOfPoint2f cornersProjected = new MatOfPoint2f();
    double totalError = 0;
    double error;
    float viewErrors[] = new float[objectPoints.size()];

    MatOfDouble distortionCoefficients = new MatOfDouble(this.mDistortionCoefficients);
    int totalPoints = 0;
    for (int i = 0; i < objectPoints.size(); i++) {
        MatOfPoint3f points = new MatOfPoint3f(objectPoints.get(i));
        Calib3d.projectPoints(points, rvecs.get(i), tvecs.get(i), this.mCameraMatrix, distortionCoefficients,
                cornersProjected);//from w w w  . j a  va2 s  .  c  o m
        error = Core.norm(this.mCornersBuffer.get(i), cornersProjected, Core.NORM_L2);

        int n = objectPoints.get(i).rows();
        viewErrors[i] = (float) Math.sqrt(error * error / n);
        totalError += error * error;
        totalPoints += n;
    }
    perViewErrors.create(objectPoints.size(), 1, CvType.CV_32FC1);
    perViewErrors.put(0, 0, viewErrors);

    return Math.sqrt(totalError / totalPoints);
}

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