OpenCV c++滑动条的创建和使用代码

int createTrackbar(const string & trackbarname, const string & winname, int * value, int count, TrackbarCallback onChange = 0, void * userdata = 0)

#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc_c.h>
#include <opencv2/imgproc/types_c.h>
#include<opencv2/imgproc.hpp>　
#include<iostream>
using namespace std;
using namespace cv;

Mat image, srcImage;
int thresholds = 50;

void threshold_track(int, void*) {
	Mat result;
	threshold(srcImage, result, thresholds, 255, THRESH_BINARY);
	//Canny(srcImage, result, thresholds, thresholds * 3, 3);
	imshow("边缘检测", result);
}

int main() {
	image = cv::imread("...cc.png");
	if (!image.data)
		return 1;
	cvtColor(image, srcImage, COLOR_BGR2GRAY);
	namedWindow("边缘检测", WINDOW_AUTOSIZE);
	createTrackbar("阈值", "边缘检测", &thresholds, 300, threshold_track);
	waitKey(0);
	return 0;
}

int getTrackbarPos(const string& trackbarname, const string& winname);