Ошибка при установке OpenCV на QT

#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <stdlib.h>
#include <stdio.h>
 
using namespace cv;
 
/// Global variables
 
Mat src, src_gray;
Mat dst, detected_edges;
 
int edgeThresh = 1;
int lowThreshold;
int const max_lowThreshold = 100;
int ratio = 3;
int kernel_size = 3;
String window_name = "Edge Map";
 
/**
 * @function CannyThreshold
 * @brief Trackbar callback - Canny thresholds input with a ratio 1:3
 */
void CannyThreshold(int, void*)
{
  /// Reduce noise with a kernel 3x3
  blur( src_gray, detected_edges, Size(3,3) );
 
  /// Canny detector
  Canny( detected_edges, detected_edges, lowThreshold, lowThreshold*ratio, kernel_size );
 
  /// Using Canny's output as a mask, we display our result
  dst = Scalar::all(0);
 
  src.copyTo( dst, detected_edges);
  imshow( window_name, dst );
 }
 
 
/** @function main */
int main( int argc, char** argv )
{    
    /// Load an image
    src = imread( "C:/TAIS/johovich.jpg");
 
    if( !src.data )
    { return -1; }
 
    /// Create a matrix of the same type and size as src (for dst)
    dst.create( src.size(), src.type() );
 
    /// Convert the image to grayscale
    cvtColor( src, src_gray, CV_BGR2GRAY );
 
    /// Create a window
    namedWindow( window_name, CV_WINDOW_AUTOSIZE );
 
    /// Create a Trackbar for user to enter threshold
    createTrackbar( "Min Threshold:", window_name, &lowThreshold, max_lowThreshold, CannyThreshold );
 
    /// Show the image
    CannyThreshold(0, 0);
 
    /// Wait until user exit program by pressing a key
    waitKey(0);
 
    return 0;
}