为什么显示错误" mainwindow.obj：-1：错误：LNK2019：函数中引用的未解析的外部符号_cvLoadImage" private：void __thiscall MainWindow :: openImage（void）" ... [英] why show error "mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvLoadImage referenced in function "private: void __thiscall MainWindow::openImage(void)"...

问题描述

我将使用opencv + qt打开图像。但我有这样的错误：



mainwindow.obj：-1：错误：LNK2019：未解析的外部符号_cvLoadImage在函数private：void __thiscall MainWindow :: openImage中引用（无效）（？openImage @ MainWindow @@ AAEXXZ）



这个代码我构建它：

 #includemainwindow.h
 #includeui_mainwindow.h
 #include< opencv / highgui.h> 
 #include< opencv / cv.h> 
 #include< opencv2 / core / core.hpp> 
 #include< opencv2 / highgui / highgui.hpp> 
 #include< opencv2 / core / mat.hpp> 
 #include< opencv2 / objdetect / objdetect.hpp> 
 
 MainWindow :: MainWindow（QWidget * parent）：
 QMainWindow（父），
 ui（new Ui :: MainWindow）
 {
 ui- > setupUi（本）;使用命名空间cv 
} 
; 
 using namespace std; 
 
 MainWindow ::〜MainWindow（）
 {
 setAttribute（Qt :: WA_QuitOnClose）; 
删除ui; 
} 
 void MainWindow :: openImage（）
 {
 fileName = QFileDialog :: getOpenFileName（this，tr（Open Image），
 QDir :: currentPath （），
 tr（图像文件[* .jpg，* .jpeg，* .bmp，* .png，* .gif]））; 
 charFileName = fileName.toLocal8Bit（）。data（）; 
 iplImg = cvLoadImage（charFileName）; 
 
 qimgNew = QImage（（const unsigned char *）iplImg-> imageData，iplImg-> width，iplImg-> height，QImage :: Format_RGB888）.rgbSwapped（）; 
 ui-> PictureOriginal-> setPixmap（QPixmap :: fromImage（qimgNew））; 
 
} 
 
 
 void MainWindow :: on_OpenImage_clicked（）
 {
 openImage（）; 
} 

解决方案

这是问题所在：

 iplImg = cvLoadImage（charFileName）; 
 

此功能未解决。我想lib不包含



opencv论坛可能更好地帮助你：



http://answers.opencv.org/question/22804/undefined-reference-to-cvloadimage/ [ ^ ]

i will open the image using opencv + qt. but i have error like this :

mainwindow.obj:-1: error: LNK2019: unresolved external symbol _cvLoadImage referenced in function "private: void __thiscall MainWindow::openImage(void)" (?openImage@MainWindow@@AAEXXZ)

this code that i'm build it :

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <opencv/highgui.h>
#include <opencv/cv.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/core/mat.hpp>
#include <opencv2/objdetect/objdetect.hpp>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}
using namespace cv;
using namespace std;

MainWindow::~MainWindow()
{
    setAttribute(Qt::WA_QuitOnClose);
    delete ui;
}
void MainWindow::openImage ()
{
    fileName = QFileDialog::getOpenFileName(this,tr("Open Image"),
                                            QDir::currentPath(),
                                            tr("Image Files [ *.jpg , *.jpeg , *.bmp , *.png , *.gif]"));
    charFileName = fileName.toLocal8Bit().data();
    iplImg = cvLoadImage(charFileName);

    qimgNew = QImage((const unsigned char*)iplImg->imageData,iplImg->width,iplImg->height,QImage::Format_RGB888).rgbSwapped();
    ui->PictureOriginal->setPixmap(QPixmap::fromImage(qimgNew));

}


void MainWindow::on_OpenImage_clicked()
{
    openImage();
}

解决方案

here is the problem:

iplImg = cvLoadImage(charFileName);

this function isnt resolved. I guess the lib isnt included

The opencv forum may better help you:

http://answers.opencv.org/question/22804/undefined-reference-to-cvloadimage/[^]

这篇关于为什么显示错误" mainwindow.obj：-1：错误：LNK2019：函数中引用的未解析的外部符号_cvLoadImage" private：void __thiscall MainWindow :: openImage（void）" ...的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！