#include<opencv2\imgproc\imgproc.hpp>
#include<opencv2\highgui\highgui.hpp>
#include<iostream>

using namespace std;
using namespace cv;

#define WINDOW "視窗"

int g_nThresholdValue = 100;
int g_nThresholdType = 3;
Mat g_srcImage, g_grayImage, g_dstImage;

void on_Threshold(int,void*);

int main()
{
    g_srcImage = imread("lena.jpg");
    if (!g_srcImage.data)
    {
        return -1;
    }
    cvtColor(g_srcImage,g_grayImage,COLOR_RGB2GRAY);
    namedWindow(WINDOW);
    createTrackbar("模式",WINDOW,&g_nThresholdType,4,on_Threshold);
    createTrackbar("引數值",WINDOW,&g_nThresholdValue,255,on_Threshold);
    on_Threshold(0,0);
    waitKey(0);
    return 0;
}

void on_Threshold(int,void*)
{
    threshold(g_grayImage,g_dstImage,g_nThresholdValue,255,g_nThresholdType);
    imshow(WINDOW,g_dstImage);
}