OpenCV调参利器之滑动条

两幅图像叠加的代码如下：

#include 
#include 
#include
using namespace cv;
using namespace std;

#define WINDOW_NAME "图像叠加"

const int g_nMaxAlphaValue = 100;
int g_nAlphaValueSlider;
double g_dAlphaValue;
double g_dBetaValue;

Mat g_srcImage1;
Mat g_srcImage2;
Mat g_dstImage;

void on_Trackbar(int, void*)
{
	g_dAlphaValue = (double)g_nAlphaValueSlider / g_nMaxAlphaValue;

	g_dBetaValue = 1.0 - g_dAlphaValue;
	//注意图像大小要相等，灰度图和彩图不能叠加
	addWeighted(g_srcImage1, g_dAlphaValue, g_srcImage2, g_dBetaValue, 0, g_dstImage);

	imshow(WINDOW_NAME, g_dstImage);
}

int main()
{
	g_srcImage1= imread("../picture/pic.jpg",1);//原图
	g_srcImage2 = imread("../picture/pic.jpg",1); //logo图

	g_nAlphaValueSlider = 70;

	namedWindow(WINDOW_NAME, 1);

	createTrackbar("滚动条", WINDOW_NAME, &g_nAlphaValueSlider, g_nMaxAlphaValue, on_Trackbar);
	on_Trackbar(g_nAlphaValueSlider, 0);

	waitKey(0);
	return 0;
}