Base from this here.
I got this error and this is the only one left for almost 3 days of my trial and error in debugging:
Unhandled exception at 0x000007FEEC6315A4 (opencv_imgproc242.dll) in PCA.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF. Please can someone here who can help me with this. Im currently using VS2012 and my os is win7 64-bit. I configure my opencv 2.4.2 following this blog.
Please help!
I've corrected some minor bugs (and now it works perfect for me):
#include #include using namespace cv; using namespace std; double getOrientation(vector &pts, Mat &img) { if (pts.size() == 0) return false; //Construct a buffer used by the pca analysis Mat data_pts = Mat(pts.size(), 2, CV_64FC1); for (int i = 0; i (i, 0) = pts[i].x; data_pts.at(i, 1) = pts[i].y; } //Perform PCA analysis PCA pca_analysis(data_pts, Mat(), CV_PCA_DATA_AS_ROW); //Store the position of the object Point pos = Point(pca_analysis.mean.at(0, 0), pca_analysis.mean.at(0, 1)); //Store the eigenvalues and eigenvectors vector eigen_vecs(2); vector eigen_val(2); for (int i = 0; i (i, 0), pca_analysis.eigenvectors.at(i, 1)); eigen_val[i] = pca_analysis.eigenvalues.at(i); } // Draw the principal components circle(img, pos, 3, CV_RGB(255, 0, 255), 2); line(img, pos, pos + 0.02 * Point(eigen_vecs[0].x * eigen_val[0], eigen_vecs[0].y * eigen_val[0]) , CV_RGB(255, 255, 0)); line(img, pos, pos + 0.02 * Point(eigen_vecs[1].x * eigen_val[1], eigen_vecs[1].y * eigen_val[1]) , CV_RGB(0, 255, 255)); return atan2(eigen_vecs[0].y, eigen_vecs[0].x); } int main() { // Read the image Mat bw, img = imread("pca_test1.jpg",1); // "pca_test2.jpg" // Convert it to greyscale cvtColor(img, bw, COLOR_BGR2GRAY); // Apply thresholding threshold(bw, bw, 150, 255, cv::THRESH_BINARY); // Find all objects of interest vector > contours; vector hierarchy; findContours(bw, contours, hierarchy, cv::RETR_LIST, cv::CHAIN_APPROX_NONE); // For each object for (size_t i = 0; i