I am using Qt-Creator 5.2.0 to create a GUI to display the Image and a binary classifier to detect the object is present or absent using Dalal & triggs HOG extraction algorithm.

I am facing the mentioned Run time error & need help to solve this issue.
QT_ERROR.jpg

mainwindow.h

Qt Code: 
  1. #ifndef MAINWINDOW_H
  2.     #define MAINWINDOW_H
  3.  
  4.     #include <QMainWindow>
  5.     #include<QDebug>
  6.     #include <opencv2/calib3d/calib3d.hpp>
  7.     //#include <opencv2/calib3d/calib3d.hpp>
  8.     #include<opencv2/core/core.hpp>
  9.     #include<opencv2/features2d/features2d.hpp>
  10.     #include<opencv2/highgui/highgui.hpp>
  11.     #include<opencv2/imgproc/imgproc.hpp>
  12.     #include<opencv2/ml/ml.hpp>
  13.     #include<opencv2/objdetect/objdetect.hpp>
  14.     using namespace cv;
  15.  
  16.     namespace Ui {
  17.     class MainWindow;
  18.     }
  19.  
  20.     class MainWindow : public QMainWindow
  21.     {
  22.         Q_OBJECT
  23.  
  24.     public:
  25.         explicit MainWindow(QWidget *parent = 0);
  26.         ~MainWindow();
  27.  
  28.     private:
  29.         Ui::MainWindow *ui;
  30.     };
  31.     float SVM_classifier(Mat image);
  32.  
  33.  
  34.     #endif // MAINWINDOW_H
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mainwindow.cpp

Qt Code: 
  1. #include "mainwindow.h"
  2.     #include "ui_mainwindow.h"
  3.  
  4.     MainWindow::MainWindow(QWidget *parent) :
  5.         QMainWindow(parent),
  6.         ui(new Ui::MainWindow)
  7.     {
  8.         ui->setupUi(this);
  9.  
  10.        IplImage *oMatDeltaImage  = cvLoadImage("E:\\Wihart\\Car_Images\\(785).jpg",CV_LOAD_IMAGE_UNCHANGED);
  11.  
  12.         Mat mat_img(oMatDeltaImage );
  13.         float oMatResult =  SVM_classifier(mat_img);
  14.     //    qDebug()<<oMatResult;
  15.  
  16.     }
  17.  
  18.     MainWindow::~MainWindow()
  19.     {
  20.         delete ui;
  21.     }
  22.  
  23.     float SVM_classifier(Mat image)
  24.     {
  25.  
  26.             resize(image, image, Size(64,128) );
  27.  
  28.             HOGDescriptor extract_features;
  29.             vector<float> descriptorsValues;
  30.             descriptorsValues.resize(0.0);
  31.             vector<Point> locations;
  32.             locations.resize(0.0);
  33.             extract_features.compute( image, descriptorsValues, Size(0,0), Size(0,0), locations);
  34.  
  35.             Mat feature_vector(descriptorsValues);// = Mat::zeros((descriptorsValues.size(),1));
  36.             CvSVM SVM;
  37.             SVM.load("SVM_classifier_data.xml");
  38.             float result= SVM.predict(feature_vector);
  39.             return result;
  40.     }
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main.cpp
Qt Code: 
  1. #include "mainwindow.h"
  2.     #include <QApplication>
  3.  
  4.     int main(int argc, char *argv[])
  5.     {
  6.         QApplication a(argc, argv);
  7.         MainWindow w;
  8.         w.show();
  9.  
  10.         return a.exec();
  11.     }
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