我在OpenCV中有错误的"approxPolyDP(ROI_Vertices, ROI_Poly, 1.0, true)"

I have mistake "approxPolyDP(ROI_Vertices, ROI_Poly, 1.0, true)" in OpenCV

本文关键字:ROI Poly true OpenCV Vertices approxPolyDP 有错误 我在      更新时间:2023-10-16

我不知道我做错了什么。

Mat mask(img.size(), CV_8UC1, Scalar::all(0));
// Create Polygon from vertices
vector<Point> ROI_Vertices(4);
ROI_Vertices.push_back(Point(196,40));
ROI_Vertices.push_back(Point(47,450));
ROI_Vertices.push_back(Point(204,450));
ROI_Vertices.push_back(Point(275,40));
vector<Point> ROI_Poly;
approxPolyDP(ROI_Vertices, ROI_Poly, 1.0, true);
// Fill polygon white
fillConvexPoly(mask, &ROI_Poly[0], ROI_Poly.size(), 255, 8, 0);
// Create new image for result storage
Mat resImage(480, 640, CV_8UC3);
// Cut out ROI and store it in imageDest
img.copyTo(resImage, mask);
imshow("h",img);
imshow("hh",resImage);

我认为我的程序识别
ROI_Vertices有点(0,0(

我该如何解决这个问题?

这很简单。删除点 (0,0(。进行以下更改

ROI_Vertices.clear();