opencv中用滚动条来控制二值化

来源：互联网发布：清华java培训编辑：程序博客网时间：2024/06/04 18:22

一，上效果图

二，上代码

#include<opencv2\opencv.hpp>
using namespace cv;
//需求：用滚动条来控制二值化
IplImage* src;
IplImage* dst;
const char* winname;
const char* trackbarname;
void trackbar(int threshold)
{
cvThreshold(src, dst, threshold, 255, CV_THRESH_BINARY);
cvShowImage(winname, dst);
}
int main()
{
winname = "窗口";
trackbarname = "滚动条";
src = cvLoadImage("D:\\111.jpg", 0);
dst = cvCreateImage(cvGetSize(src), IPL_DEPTH_8U, 1);
int value = 128;
cvNamedWindow(winname);
cvCreateTrackbar(trackbarname, winname, &value, 255, trackbar);
trackbar(150);
cvWaitKey(0);
return 0;

}

三，总结

还是函数

(1)cvThreshold

(2)cvCreateTrackbar

此外，自己在编写程序的时候，没注意将cvNamedWindow(winname);放在了cvCreateTrackbar(trackbarname, winname, &value, 255, trackbar);的后面，就导致了窗口中出现不了滚动条！！

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