visual studio 2022 C ++ Opecv cam 及時圖片放大縮小 VideoCapture

// OpenCV_Cam.cpp : 此檔案包含 'main' 函式。程式會於該處開始執行及結束執行。 // #include <iostream> #include <opencv2/highgui.hpp> #include<opencv2/opencv.hpp> using namespace std; using namespace cv; bool m_IsTest; int m_Image_count; int m_Before_Image_count; int m_horizontal; int m_vertical; int m_SleepTime; bool m_Need_Refreshed; // 預設的視窗大小 int m_Required_Image_Width; int m_Required_Image_Height; //New Defiend Mat org;//原图 Mat img;//输出图片 Mat imgROI;//感兴趣区域 Mat roiResize;//感兴趣区域ROI的两倍 Mat tranPart; int foo = 50;//定义尺寸 int fooResize = 2 * foo;//最终显示放大镜的正方形区域的边长，用作下面if的判断 int pitch_x,pitch_y,w,L,zoom; //cv::Rect crop(95, 31, 450, 412); int P1X = 1 ,P1Y=1,P2X=450,P2Y=412; int scale; int temCurrentIndex; double ScaleFactor; int ZoomIndex = -1; cv::Mat FrameMat[120]; cv::Mat FinalMat_Zoom; int scale_inde=0; bool scale_staus = false; void CropImage_zoomin() { int width = (P2X - (pitch_x * (scale_inde))) - (P1X + (pitch_x * (scale_inde))); int hight = (P2Y - (pitch_y * (scale_inde))) - (P1Y + (pitch_y * (scale_inde))); Rect roi = Rect(P1X + (pitch_x * (scale_inde)), P1Y + (pitch_y * (scale_inde)), width, hight); cv::Mat m1l = FrameMat[temCurrentIndex](roi); cv::resize(m1l, FinalMat_Zoom, cv::Size(w, L)); } void CropImage_zoomout() { //Rect roi = Rect(cx - (pitch_x * scale_inde), cy - (pitch_y *scale_inde), cx + (pitch_x *scale_inde), cy + (pitch_y * scale_inde)); //cv::Mat m1l = FrameMat[temCurrentIndex](roi); //cv::resize(m1l, FinalMat_Zoom, cv::Size(w, L)); int width = (P2X - (pitch_x * (scale_inde))) - (P1X + (pitch_x * (scale_inde))); int hight = (P2Y - (pitch_y * (scale_inde))) - (P1Y + (pitch_y * (scale_inde))); Rect roi = Rect(P1X + (pitch_x * (scale_inde)), P1Y + (pitch_y * (scale_inde)), width, hight); cv::Mat m1l = FrameMat[temCurrentIndex](roi); cv::resize(m1l, FinalMat_Zoom, cv::Size(w, L)); } void CallBackFunc(int event, int x, int y, int flags, void* userdata) { if (event == EVENT_LBUTTONDOWN) { scale_inde = scale_inde + 1; if (scale_inde >= 4) { scale_inde = 4; } CropImage_zoomin(); scale_staus = true; ZoomIndex = 1; //cout << "Left button of the mouse is clicked - position (" << x << ", " << y << ")" << endl; } else if (event == EVENT_RBUTTONDOWN) { if(scale_staus==true) { scale_inde = scale_inde - 1; if (scale_inde == 0) { scale_inde = 0; scale_staus = false; ZoomIndex = -1; } else { scale_staus = true; ZoomIndex = 2; } CropImage_zoomout(); } //cout << "Right button of the mouse is clicked - position (" << x << ", " << y << ")" << endl; } else if (event == EVENT_MBUTTONDOWN) { // << "Middle button of the mouse is clicked - position (" << x << ", " << y << ")" << endl; } else if (event == EVENT_MOUSEMOVE) { ////形参x,y是鼠标点击的位置 //Mat img_temp = img.clone();//临时变量，存放原图 ////if的作用，x，y是鼠标坐标，限定不能太靠近左上角x > fooResize和 y>fooResize，目的是能让放大镜显示出来。 ////同时限定不能太靠近右下角x<img_temp.cols - fooResize和 y < img_temp.rows - fooResize //if (x > fooResize && x<img_temp.cols - fooResize && y>fooResize && y < img_temp.rows - fooResize) { // //感兴趣区域范围 // imgROI = img_temp(Rect(x - foo, y - foo, 2 * foo, 2 * foo));//以(x,y)为中心，左右为foo做正方形 // //tranPart是最后显示放大的区域，这里 // tranPart = img_temp(Range(y - 2 * foo, y + 2 * foo), Range(x - 2 * foo, x + 2 * foo));//Range表示纵、横坐标的范围 // //感兴趣区域放大两倍，需要和tranPart的尺寸搭配。可调，但是注意不能超过图片本身范围。 // resize(imgROI, roiResize, Size(2 * imgROI.cols, 2 * imgROI.rows));//输出到roiResize这个Mat对象中 // roiResize.copyTo(tranPart);//复制到tranPart这个Mat对象中 // //标注鼠标的位置 // circle(img_temp, Point(x, y), 10, Scalar(0, 0, 255), 1, 8, 0);//画一个简单的圆 // imshow("img", img_temp);//显示窗口 // //cout << "Mouse move over the window - position (" << x << ", " << y << ")" << endl; //} } } int main() { cv::VideoCapture cap(0); //cv::VideoCapture cap("C:\\work\\Remex\\program\\CaptureVideo_test_1\\test_video.mp4"); cap.grab(); clock_t a, b, c; cv::Mat frame; //cv::Mat FinalMat = cv::Mat::zeros(m_Required_Image_Height, m_Required_Image_Width, CV_8UC3); //cv::UMat FinalUMat = cv::UMat::zeros(FinalMat.rows, FinalMat.cols, frame.type()); //m_Required_Image_Width = 1600; //m_Required_Image_Height = 1200; m_Required_Image_Width = 800; m_Required_Image_Height = 600; ScaleFactor = m_Required_Image_Width / 675.0; if (m_Required_Image_Height / 412.0 < ScaleFactor) ScaleFactor = m_Required_Image_Height / 412.0; ScaleFactor = ScaleFactor * 0.9; int NumAveFrame = 40; cv::Mat Mask_Invisible_Part[120]; cv::Mat Mask_Visible_Part[120]; for (int i = 0; i < NumAveFrame; i++) { FrameMat[i] = cv::Mat::zeros(frame.rows, frame.cols, CV_8UC3); Mask_Invisible_Part[i] = cv::Mat::zeros(frame.rows, frame.cols, CV_8UC1); Mask_Visible_Part[i] = cv::Mat::zeros(frame.rows, frame.cols, CV_8UC1); } int CurrentIndex = -1; bool NoError = true; bool NoFirstOne = false; cv::Mat temMat; while (1) { a = clock(); // Capture frame-by-frame cap >> frame; // If the frame is empty, break immediately if (frame.empty()) break; if (m_Need_Refreshed) { CurrentIndex = -1; NoFirstOne = false; m_Need_Refreshed = false; } CurrentIndex++; temCurrentIndex = CurrentIndex % NumAveFrame; int PretemCurrentIndex = temCurrentIndex - 1; if (PretemCurrentIndex < 0) PretemCurrentIndex = NumAveFrame - 1; frame.copyTo(FrameMat[temCurrentIndex]); if (CurrentIndex > 20000) CurrentIndex = NumAveFrame + temCurrentIndex; if (m_IsTest) { m_Before_Image_count++; cv::imwrite("0_B_" + std::to_string(m_Before_Image_count) + "_" + std::to_string(m_Image_count) + ".bmp", frame); cv::imwrite("0_A_" + std::to_string(m_Before_Image_count) + "_" + std::to_string(m_Image_count) + ".bmp", FrameMat[temCurrentIndex]); } NoFirstOne = true; cv::Mat FinalMat; cv::Mat temFrame; //cv::Rect crop(95, 31, 450, 412); cv::Rect crop(P1X, P1Y, P2X, P2Y); cv::Mat m1 = FrameMat[temCurrentIndex](crop); w = 675 * ScaleFactor; L = 412 * ScaleFactor; //calculate pitch pitch_x = (P2X - P1X) / 10; pitch_y = (P2Y - P1Y) / 10; //No Scale cv::resize(m1, FinalMat, cv::Size(w, L)); if (m_IsTest) { m_Before_Image_count++; cv::imwrite("0_B_" + std::to_string(m_Before_Image_count) + "_" + std::to_string(m_Image_count) + ".bmp", frame); cv::imwrite("0_A_" + std::to_string(m_Before_Image_count) + "_" + std::to_string(m_Image_count) + ".bmp", FrameMat[temCurrentIndex]); } namedWindow("Remex");//创建opencv窗口 if(scale_staus==false) { cv::imshow("Remex", FinalMat); } else { switch (ZoomIndex) { case 1: CropImage_zoomin(); break; case 2: CropImage_zoomout(); break; default: break; } cv::imshow("Remex", FinalMat_Zoom); } //img = FinalMat.clone(); setMouseCallback("Remex", CallBackFunc, NULL); cv::waitKey(25); } cap.release(); } // 執行程式: Ctrl + F5 或 [偵錯] > [啟動但不偵錯] 功能表 // 偵錯程式: F5 或 [偵錯] > [啟動偵錯] 功能表 // 開始使用的提示: // 1. 使用 [方案總管] 視窗，新增/管理檔案 // 2. 使用 [Team Explorer] 視窗，連線到原始檔控制 // 3. 使用 [輸出] 視窗，參閱組建輸出與其他訊息 // 4. 使用 [錯誤清單] 視窗，檢視