so i am just trying to align this image
and i am following these steps here
so after performing hough transform the result was this image
and now i am performing affine Transform and i am getting the Cvtype error
OpenCV Error: Assertion failed (src.checkVector(2, CV_32F) == 3 && dst.checkVector(2, CV_32F) == 3) in getAffineTransform, file /home/tomna/Desktop/opencv-3.1.0/modules/imgproc/src/imgwarp.cpp, line 6360 Exception in thread "main" CvException [org.opencv.core.CvException: cv::Exception: /home/tomna/Desktop/opencv-3.1.0/modules/imgproc/src/imgwarp.cpp:6360: error: (-215) src.checkVector(2, CV_32F) == 3 && dst.checkVector(2, CV_32F) == 3 in function getAffineTransform
]
here is my code
System.out.println("Detecting Charachters");
Mat roi_image = ("122.jpg");
Mat element = getStructuringElement(MORPH_RECT, new Size(2, 2));
Mat Kernel = Mat.ones(new Size(1, 1), MORPH_RECT);
Mat roi_canny = new Mat();
Mat roi_lines = new Mat();
Mat roi_bila = new Mat();
Mat roi_histo = new Mat();
Mat roi_morphologyEx = new Mat();
Mat roi_grey = new Mat();
Mat roi_sobel = new Mat();
Imgproc.cvtColor(roi_image, roi_image, Imgproc.COLOR_BGR2GRAY);
Imgproc.equalizeHist(roi_image, roi_histo);
/////////////////edge detection/////////////////////////////////////////////////////////////////
Imgproc.Canny(roi_histo, roi_canny, 250, 150);
Imgproc.HoughLines(roi_canny, roi_lines, 1, Math.PI / 180, 50);
Mat mRgba = new Mat(roi_canny.size(), CvType.CV_8UC3, Scalar.all(0));
/////////////////////Hough transform///////////////////////////////////////////////////////////
for (int i = 0; i < roi_lines.rows(); i++) {
double val[] = roi_lines.get(i, 0);
// System.out.println(roi_lines.get(i, 0));
// Imgproc.line(ik, new Point(val[0], val[1]), new Point(val[2], val[1]), new Scalar(0, 0, 255), 2);
double rho1 = val[0];
double theta1 = val[1];
double cosTheta = Math.cos(theta1);
double sinTheta = Math.sin(theta1);
double x0 = cosTheta * rho1;
double y0 = sinTheta * rho1;
Point pt1 = new Point(x0 + 10000 * (-sinTheta), y0 + 10000 * cosTheta);
Point pt2 = new Point(x0 - 10000 * (-sinTheta), y0 - 10000 * cosTheta);
Imgproc.line(mRgba, pt1, pt2, new Scalar(0, 0, 255), 2);
}
MatOfPoint2f srcTri = new MatOfPoint2f();
Point[] canonicalPoints = new Point[4];
canonicalPoints[0] = new Point(-30, 60);
canonicalPoints[1] = new Point(mRgba.cols() + 50, -50);
canonicalPoints[2] = new Point(mRgba.cols() + 100, mRgba.rows() + 50);
canonicalPoints[3] = new Point(-50, mRgba.rows() + 50);
srcTri.fromArray(canonicalPoints);
//////////////////////////////////////////////////////////////
MatOfPoint2f dstTri = new MatOfPoint2f();
Point[] canonicalPoints1 = new Point[4];
canonicalPoints1[0] = new Point(0, 0);
canonicalPoints1[1] = new Point(mRgba.cols() - 1, 0);
canonicalPoints1[2] = new Point(mRgba.cols() - 1, mRgba.rows() - 1);
canonicalPoints1[3] = new Point(0, mRgba.rows() - 1);
dstTri.fromArray(canonicalPoints1);
Mat m = new Mat(4, 1, CvType.CV_32FC2);
m = Imgproc.getAffineTransform(srcTri, dstTri);
Imgproc.warpAffine(mRgba, mRgba, m, mRgba.size());
Imgcodecs.imwrite("123.jpg", mRgba);
so my question is am i in the right track and my numbers are right? and how to get them ? and the error .
