opencv直线检测

#include <opencv.hpp>
#include<iostream>
#include <string>
#include<conio.h>
#include<time.h>
#include<math.h>
using namespace std;
using namespace cv;

int max_count = 255;
int threshold_value = 100;
const char* output_lines = "Hough Lines";
Mat dst, src,roiImage;
void detectLines(int, void*);
void morhpologyLines(int, void*);
int main()
{
   
	src = imread("E:\\Users\\opencvCoder\\image\\exam.png", IMREAD_GRAYSCALE);
	if (src.empty())
	{
   
		printf("could not load image...\n");
		return -1;
	}

	namedWindow("input image", WINDOW_AUTOSIZE);
	imshow("imput image", src