不换行写法
1 win32:CONFIG(release, debug|release): LIBS += -LG:/opencv4.4.0/opencv4.4_vs_msvc19_qt6.5/x64/vc17/lib/ -lopencv_aruco440 -lopencv_bgsegm440 -lopencv_bioinspired440 -lopencv_calib3d440 -lopencv_ccalib440 -lopencv_core440 -lopencv_cvv440 -lopencv_datasets440 -lopencv_dnn440 -lopencv_dnn_objdetect440 -lopencv_dnn_superres440 -lopencv_dpm440 -lopencv_face440 -lopencv_features2d440 -lopencv_flann440 -lopencv_fuzzy440 -lopencv_gapi440 -lopencv_hfs440 -lopencv_highgui440 -lopencv_imgcodecs440 -lopencv_imgproc440 -lopencv_img_hash440 -lopencv_intensity_transform440 -lopencv_line_descriptor440 -lopencv_ml440 -lopencv_objdetect440 -lopencv_optflow440 -lopencv_phase_unwrapping440 -lopencv_photo440 -lopencv_plot440 -lopencv_quality440 -lopencv_rapid440 -lopencv_reg440 -lopencv_saliency440 -lopencv_shape440 -lopencv_stereo440 -lopencv_stitching440 -lopencv_structured_light440 -lopencv_superres440 -lopencv_surface_matching440 -lopencv_text440 -lopencv_tracking440 -lopencv_video440 -lopencv_videoio440 -lopencv_videostab440 -lopencv_xfeatures2d440 -lopencv_ximgproc440 -lopencv_xobjdetect440 -lopencv_xphoto440 2 else:win32:CONFIG(debug, debug|release): LIBS += -LG:/opencv4.4.0/opencv4.4_vs_msvc19_qt6.5/x64/vc17/lib/ -lopencv_aruco440d -lopencv_bgsegm440d -lopencv_bioinspired440d -lopencv_calib3d440d -lopencv_ccalib440d -lopencv_core440d -lopencv_cvv440d -lopencv_datasets440d -lopencv_dnn440d -lopencv_dnn_objdetect440d -lopencv_dnn_superres440d -lopencv_dpm440d -lopencv_face440d -lopencv_features2d440d -lopencv_flann440d -lopencv_fuzzy440d -lopencv_gapi440d -lopencv_hfs440d -lopencv_highgui440d -lopencv_imgcodecs440d -lopencv_imgproc440d -lopencv_img_hash440d -lopencv_intensity_transform440d -lopencv_line_descriptor440d -lopencv_ml440d -lopencv_objdetect440d -lopencv_optflow440d -lopencv_phase_unwrapping440d -lopencv_photo440d -lopencv_plot440d -lopencv_quality440d -lopencv_rapid440d -lopencv_reg440d -lopencv_saliency440d -lopencv_shape440d -lopencv_stereo440d -lopencv_stitching440d -lopencv_structured_light440d -lopencv_superres440d -lopencv_surface_matching440d -lopencv_text440d -lopencv_tracking440d -lopencv_video440d -lopencv_videoio440d -lopencv_videostab440d -lopencv_xfeatures2d440d -lopencv_ximgproc440d -lopencv_xobjdetect440d -lopencv_xphoto440d 3 4 5 INCLUDEPATH += G:/opencv4.4.0/opencv4.4_vs_msvc19_qt6.5/include 6 DEPENDPATH += G:/opencv4.4.0/opencv4.4_vs_msvc19_qt6.5/include
换行写法
1 win32:CONFIG(release, debug|release): LIBS += -LG:/opencv4.4.0/opencv4.4_vs_msvc19_qt6.5/x64/vc17/lib/ \ 2 -lopencv_aruco440 \ 3 -lopencv_bgsegm440 \ 4 -lopencv_bioinspired440 \ 5 -lopencv_calib3d440 \ 6 -lopencv_ccalib440 \ 7 -lopencv_core440 \ 8 -lopencv_cvv440 \ 9 -lopencv_datasets440 \ 10 -lopencv_dnn440 \ 11 -lopencv_dnn_objdetect440 \ 12 -lopencv_dnn_superres440 \ 13 -lopencv_dpm440 \ 14 -lopencv_face440 \ 15 -lopencv_features2d440 \ 16 -lopencv_flann440 \ 17 -lopencv_fuzzy440 \ 18 -lopencv_gapi440 \ 19 -lopencv_hfs440 \ 20 -lopencv_highgui440 \ 21 -lopencv_imgcodecs440 \ 22 -lopencv_imgproc440 \ 23 -lopencv_img_hash440 \ 24 -lopencv_intensity_transform440 \ 25 -lopencv_line_descriptor440 \ 26 -lopencv_ml440 \ 27 -lopencv_objdetect440 \ 28 -lopencv_optflow440 \ 29 -lopencv_phase_unwrapping440 \ 30 -lopencv_photo440 \ 31 -lopencv_plot440 \ 32 -lopencv_quality440 \ 33 -lopencv_rapid440 \ 34 -lopencv_reg440 \ 35 -lopencv_saliency440 \ 36 -lopencv_shape440 \ 37 -lopencv_stereo440 \ 38 -lopencv_stitching440 \ 39 -lopencv_structured_light440 \ 40 -lopencv_superres440 \ 41 -lopencv_surface_matching440 \ 42 -lopencv_text440 \ 43 -lopencv_tracking440 \ 44 -lopencv_video440 \ 45 -lopencv_videoio440 \ 46 -lopencv_videostab440 \ 47 -lopencv_xfeatures2d440 \ 48 -lopencv_ximgproc440 \ 49 -lopencv_xobjdetect440 \ 50 -lopencv_xphoto440 51 52 else:win32:CONFIG(debug, debug|release): LIBS += -LG:/opencv4.4.0/opencv4.4_vs_msvc19_qt6.5/x64/vc17/lib/ \ 53 -lopencv_aruco440d \ 54 -lopencv_bgsegm440d \ 55 -lopencv_bioinspired440d \ 56 -lopencv_calib3d440d \ 57 -lopencv_ccalib440d \ 58 -lopencv_core440d \ 59 -lopencv_cvv440d \ 60 -lopencv_datasets440d \ 61 -lopencv_dnn440d \ 62 -lopencv_dnn_objdetect440d \ 63 -lopencv_dnn_superres440d \ 64 -lopencv_dpm440d \ 65 -lopencv_face440d \ 66 -lopencv_features2d440d \ 67 -lopencv_flann440d \ 68 -lopencv_fuzzy440d \ 69 -lopencv_gapi440d \ 70 -lopencv_hfs440d \ 71 -lopencv_highgui440d \ 72 -lopencv_imgcodecs440d \ 73 -lopencv_imgproc440d \ 74 -lopencv_img_hash440d \ 75 -lopencv_intensity_transform440d \ 76 -lopencv_line_descriptor440d \ 77 -lopencv_ml440d \ 78 -lopencv_objdetect440d \ 79 -lopencv_optflow440d \ 80 -lopencv_phase_unwrapping440d \ 81 -lopencv_photo440d \ 82 -lopencv_plot440d \ 83 -lopencv_quality440d \ 84 -lopencv_rapid440d \ 85 -lopencv_reg440d \ 86 -lopencv_saliency440d \ 87 -lopencv_shape440d \ 88 -lopencv_stereo440d \ 89 -lopencv_stitching440d \ 90 -lopencv_structured_light440d \ 91 -lopencv_superres440d \ 92 -lopencv_surface_matching440d \ 93 -lopencv_text440d \ 94 -lopencv_tracking440d \ 95 -lopencv_video440d \ 96 -lopencv_videoio440d \ 97 -lopencv_videostab440d \ 98 -lopencv_xfeatures2d440d \ 99 -lopencv_ximgproc440d \ 100 -lopencv_xobjdetect440d \ 101 -lopencv_xphoto440d
最简单测试代码，不加按钮，启动后直接读取硬盘上一张图片
1 #include "mainwindow.h"
2 #include "ui_mainwindow.h"
3
4 #include <opencv2/core/core.hpp>
5 #include <opencv2/highgui/highgui.hpp>
6 #include <opencv2/imgproc/imgproc.hpp>
7
8 using namespace cv;
9
10 MainWindow::MainWindow(QWidget *parent)
11 : QMainWindow(parent)
12 , ui(new Ui::MainWindow)
13 {
14 ui->setupUi(this);
15
16 cv::Mat image = imread("D:\\2.jpg");
17 namedWindow("Display window",WINDOW_AUTOSIZE);
18 imshow("Display window",image);
19 waitKey(0);
20 }
21
22 MainWindow::~MainWindow()
23 {
24 delete ui;
25 }
添加按钮后代码，可点击按钮打开图片
1 #include "mainwindow.h"
2 #include "ui_mainwindow.h"
3
4 #include <QFileDialog>
5 #include <QMessageBox>
6 #include <QPixmap>
7
8 #include <opencv2/opencv.hpp>
9 #include <opencv2/imgproc.hpp>
10
11 using namespace cv; // 引入opencv的命名空间
12 using namespace std;
13
14 MainWindow::MainWindow(QWidget *parent)
15 : QMainWindow(parent)
16 , ui(new Ui::MainWindow)
17 {
18 ui->setupUi(this);
19 }
20
21 MainWindow::~MainWindow()
22 {
23 delete ui;
24 }
25
26 void MainWindow::on_pushButton_clicked()
27 {
28 QString filename = QFileDialog::getOpenFileName(this, "打开图像文件", "C:/Users", "Image Files (*.bmp;*.png;*.jpg)");
29
30 if (filename.isEmpty()) {
31 QMessageBox::information(this, "提示", "文件打开失败1!");
32 return;
33 }
34 Mat img_input;
35 img_input = imread(filename.toLocal8Bit().toStdString());
36
37 if (img_input.empty()) {
38
39 QMessageBox::information(this, "提示", "文件打开失败2!");
40 return;
41 }
42 cv::Mat temp;
43 cv::cvtColor(img_input, temp, cv::COLOR_BGR2RGB);
44
45 namedWindow("Display window",WINDOW_AUTOSIZE);
46 imshow("Display window",img_input);
47 waitKey(0);
48
49 MainWindow w;
50 w.show();
51 }
相对来说qt+mingw+opencv的路径就比较简单
1 #包含路径 2 INCLUDEPATH += E:\opencv\opencv4.5.4_mingw730_64_qt5.14.2\include 3 4 #库文件 5 LIBS += E:\opencv\opencv4.5.4_mingw730_64_qt5.14.2\x64\mingw\lib\libopencv*.a
标签：qt5.14,lopencv,img,opencv,opencv4.4,测试通过,ui,include,MainWindow From： https://www.cnblogs.com/kfcalf/p/18375165