Qt Creator中OpenCV程序中的链接器错误

Linker error in OpenCV Program in Qt-Creator

本文关键字:链接 错误 程序 Creator OpenCV Qt      更新时间:2023-10-16

我在安装OpenCV-3的Qt Creator Qt-5.4中收到以下错误:-

:-1:错误:LNK1104:无法打开文件'opencv_ts300.lib'

在我项目的.pro文件中,我添加了-

INCLUDEPATH += "E:opencvbuildinclude"
LIBS += -L"E:opencvbuildx86vc11lib"
LIBS += -lopencv_ts300d  -lopencv_world300d  -lopencv_ts300    -lopencv_world300d

以下是我的主要.cpp程序:-

#include "mainwindow.h"
#include <QApplication>
#include<opencv2/opencv.hpp>
using namespace cv; // else would have to specify cv::cvtColor() etc.

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
char * imageName ="2-dp.JPG" ; // read the name of image to be loaded called   3-dp.JPG
Mat image;                  // declare Mat type object to load image-matrix
image = imread(imageName,1); // image object now contains image-matrix of the image loaded
if(!image.data)  // if image-data was invalid/non-existent/could not be read
{
    printf("No image data to load n"); // then print messg
    return -1;                          // and exit program with exit code -1
}
Mat gray_image;            // Mat object declared for the image after gray-scale conversion
cvtColor(image, gray_image, CV_BGR2GRAY); // converts from BGR/RGB color space to gray scale
/*imwrite ("Gray_Image.jpg",gray_image);*/ //writes image-data (converted to gray scale iamge) into disk in JPEG format at file path given
namedWindow(imageName,CV_WINDOW_AUTOSIZE); // creates a named window for original image s.t window auto-scales its size as per image
namedWindow("Gray Image",CV_WINDOW_AUTOSIZE);
imshow(imageName,image);    // displays the image on the namedWindow by giving name of namedWindow
imshow("Gray Image",gray_image);
waitKey(0); //waits forever till user presses key

return a.exec();
}

请帮忙!

链接

不应在一行中的库名称之间使用反斜杠符号。它不会给出问题中提到的错误消息,但是链接失败,并返回相同的错误代码。

反斜线符号可用于打断长行:

LIBS += -lopencv_ts300d 
        -lopencv_world300d

否则,库应在没有:的情况下列在一行中

LIBS += -lopencv_ts300 -lopencv_world300

运行时

运行时可能会发现一些问题。

有两种库类型:debug(用后缀d标记)和release。它们不应该混合在一个构建中。使用错误的库类型可能会导致运行时崩溃,例如,当使用HoughLinesP 时,Qt中的OpenCV在行的向量的释放时崩溃

根据发布或调试模式,可以编写仅使用适当库的qmake .pro文件:

INCLUDEPATH += "E:opencvbuildinclude"
LIBS += -L"E:opencvbuildx86vc11lib"
CONFIG(release, debug|release) {
    # release libraries
    LIBS += -lopencv_ts300 -lopencv_world300
}
CONFIG(debug, debug|release) {
    # debug libraries
    LIBS += -lopencv_ts300d 
            -lopencv_world300d
}

请注意,E:opencvbuildx86vc11bin中还有二进制动态加载库。如果在运行时找不到这些库,则应用程序应该崩溃。该路径可以被添加到系统PATH环境变量,或者所需的库可以被复制到应用程序文件夹或系统PATH中列出的其他位置。


确保您使用的是vc11的编译器、链接器和Qt构建。对于MSVC2013,应使用文件夹vc12E:opencvbuildx86vc12lib)中的库。