5

我正在尝试在 Qt Creator 中设置 OpenCV，但遇到了一些问题。我在 Qt Creator .pro 文件中添加了 OpenCV 路径

INCLUDEPATH += /usr/local/include/opencv
LIBS += -L/usr/local/lib \
-lopencv_core \
-lopencv_imgproc \
-lopencv_highgui \
-lopencv_ml \
-lopencv_video \
-lopencv_features2d \
-lopencv_calib3d \
-lopencv_objdetect \
-lopencv_contrib \
-lopencv_legacy \
-lopencv_flann

我想在这段代码中阅读并显示图像

void MainWindow::on_pushButton_clicked()
{
     cv::Mat matInput = cv::imread("LP.jpg");
     if( matInput.empty())
     {
          std::cout<<"Can't load image "<<std::endl;
     }
     cv::namedWindow("Show");
     cv::imshow("Show", matInput);
     cv::waitKey();
}

当我运行我的项目时，它显示以下消息：

正在启动 /home/vasan/Qt/build-OpenCVWithQt-Desktop-Debug/OpenCVWithQt...
程序意外完成。
/home/vasan/Qt/build-OpenCVWithQt-Desktop-Debug/OpenCVWithQt 退出，代码为 0

4

3 回答 3

3

几天来，我也一直在尝试为 Qt Creator 设置 OpenCV。我建议您尝试在

https://code.google.com/p/qt-opencv-multithreaded/wiki/Documentation

这很容易遵循，而且很有效。当您进入第 1.3 节时，运行您手头的任何代码示例。我用了：

int main( int argc, char** argv )
{
    if( argc != 2)
    {
     cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
     return -1;
    }

    Mat image;
    image = imread(argv[1], CV_LOAD_IMAGE_COLOR);   // Read the file
    image = imread("lena.png", CV_LOAD_IMAGE_COLOR);   // Read the file
    if(! image.data )                              // Check for invalid input
    {
        cout <<  "Could not open or find the image" << std::endl ;
        return -1;
    }

    namedWindow( "Display window", CV_WINDOW_AUTOSIZE );// Create a window for display.
    imshow( "Display window", image );                   // Show our image inside it.

    waitKey(0);                                          // Wait for a keystroke in the window
    return 0;
}

希望有帮助！

于 2013-08-29T10:31:05.620 回答
2

它对我有用：

INCLUDEPATH += /usr/local/include/opencv2
LIBS += -L/usr/local/lib
LIBS += -lopencv_core
LIBS += -lopencv_imgproc
LIBS += -lopencv_highgui
LIBS += -lopencv_ml
LIBS += -lopencv_video
LIBS += -lopencv_features2d
LIBS += -lopencv_calib3d
LIBS += -lopencv_objdetect
LIBS += -lopencv_contrib
LIBS += -lopencv_legacy
LIBS += -lopencv_flann
LIBS += -lopencv_nonfree
于 2014-04-10T13:15:23.847 回答
0

你的代码是正确的。我认为问题出现是因为您正在使用阴影构建。出于这个原因，您应该将图像放在影子构建文件夹（包含可执行文件的文件夹）中，而不是放在项目文件夹（仅包含代码文件）中。

另一个技巧是在if情况下插入return语句，这样程序在找不到图像时不会退出。

 if( matInput.empty())
 {
      qDebug() << "Can't load image";
      return;
 }

此外，请务必包含以下标题

#include <QDebug>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
于 2014-01-01T18:42:00.867 回答