Opencv学习十一（基本阈值）

#include<opencv2/opencv.hpp>
#include<iostream>
#include<math.h>
#include <opencv2\imgproc\types_c.h>

using namespace cv;

Mat src, gray_src, dst;
int threshold_value = 88;//定义阈值
int threshold_max = 255;
int type_value = 2;
int type_max = 4;
const char* output_title = "binary image";
void Threshold_Demo(int, void*);

int main(int argc, char** argv)
{
	src = imread("2.jpg");
	if (!src.data)
	{
		printf("无\n");
		return -1;
	}

	namedWindow("input image", WINDOW_FREERATIO);
	namedWindow(output_title, WINDOW_FREERATIO);
	imshow("input image", src);

	createTrackbar("Threshold Value:", output_title, &threshold_value, threshold_max, Threshold_Demo);
	createTrackbar("Type Value:", output_title, &type_value, type_max, Threshold_Demo);
	Threshold_Demo(0, 0);

	waitKey(0);
	return 0;
}

void Threshold_Demo(int, void*)
{
	cvtColor(src, gray_src, CV_BGR2GRAY);
	threshold(gray_src, dst, threshold_value, threshold_max, type_value);
	imshow(output_title, dst);
}