OpenCV学习笔记——滑动条开关

由于opencv库中并没有专门为开关而设的函数,可以用滑动条做开关

代码:

#include<highgui.h>
#include<cv.h>
int g_switch_value = 0;
IplImage *img;
void switch_off_fcuntion();
void switch_on_function();
void switch_callback(int position)
{
	if (!position)
	{	
		switch_off_fcuntion();
	}
	else
	{		
		switch_on_function();		
	}
}
int main(void)
{
	cvNamedWindow("sample",1);
	cvCreateTrackbar("Switch", "sample", &g_switch_value, 1, switch_callback);//中间的数值用来自定义可变换区间长度
	while (1)
	{
		if (cvWaitKey(15) == 27)
		{
			cvReleaseImage(&img);
			cvDestroyAllWindows();
			break;
		}
	}
	return 0;
}
void switch_off_fcuntion()
{
	puts("This is q1");
	img = cvLoadImage("q1.jpg", -1);
	cvShowImage("sample", img);
	puts("Q1");
	return;
}
void switch_on_function()
{
	puts("This is q1");
	img = cvLoadImage("q2.jpg", -1);
	cvShowImage("sample", img);
	puts("Q2");
	return;
}
原文地址:https://www.cnblogs.com/Blackops/p/5766280.html