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本文介紹了如何在 QtCreator 中鏈接 opencv 并使用 Qt 庫的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！

問題描述

這個問題必須重復多次，但它不起作用，有時仍然沒有答案.信息來源主要是這些
http://www.laganiere.name/opencvCookbook/chap1s1_2.shtml
http://www.youtube.com/watch?v=dgcXYQijV6c

This question must be duplicate many times, but it just doesn't work and sometimes it still remains unanswered. Sources of information are mainly these
http://www.laganiere.name/opencvCookbook/chap1s1_2.shtml
http://www.youtube.com/watch?v=dgcXYQijV6c

這是我認為應該/可以做的總結.(現在它對我有用.)希望我從一開始就提到了所有內容，目的是編寫一個非常清晰的教程.

This is the summation of what I think one should/can do. (And now it works for me.) Hopefully I mentioned everything from the very beginning, the aim is to write a very clear tutorial.

為 QtCreator 安裝 OpenCV

我已經安裝了 MS Visual Studio 2010 Professional.(我作為學生有免費許可證)-我認為這沒有必要，只是提一下
下載:適用于 Windows 32 位的 Qt 5.0.1(MinGW 4.7，823 MB)
2.1 安裝: 警告，Qt 使用的所有內容(例如 OpenCV)必須位于名稱中不包含空格的目錄中.- 即程序文件"是錯誤的.(但我不希望不同的程序文件直接堆積在 C 上，所以我只創建了一個文件夾Programs"，其中安裝了所有重要的東西)
下載: cmake-2.8.10.2-win32-x86.exe - 為所有用戶安裝(這可以在程序文件中)
下載: OpenCV-2.4.0.exe，解壓到:C:Programsopencv24 - 它將創建一個目錄opencv"；添加另一個文件夾opencv_bin".現在看起來像這樣:
C:Programsopencv24opencv*
C:Programsopencv24opencv_bin
設置 PATH 環境變量，以便有一個到 MinGW 編譯器的鏈接.例如C:ProgramsQtQt5.0.1ToolsMinGWin;
啟動 cmake-gui.exe
6.1 源碼:設置OpenCV的默認目錄；C:Programsopencv24opencv
6.2 binaries:設置opencv_bin目錄；C:Programscopencv24opencv_bin
6.3 點擊配置:
- 選擇MinGW Makefiles和Specify native compilers，點擊下一步
- 字段 C 用于 gcc.exe；C:/Programs/Qt/Qt5.0.1/Tools/MinGW/bin/gcc.exe
- Field C++ 用于 g++.exe；C:/Programs/Qt/Qt5.0.1/Tools/MinGW/bin/g++.exe

I have already MS Visual Studio 2010 Professional installed. (I have a free licence as a student) - I think this is not necessary, just a mention
Download: Qt 5.0.1 for Windows 32-bit (MinGW 4.7, 823 MB)
2.1 Install: Warning, everything that Qt uses (e.g. OpenCV) must be in directories that don't contain white-spaces in their names. - i.e. "Program Files" is wrong. (But I don't want different program files to accumulate directly on C, so I've only made a folder "Programs" in which everything important is installed)
Download: cmake-2.8.10.2-win32-x86.exe - Install for all users (this can be in Program Files)
Download: OpenCV-2.4.0.exe, extract to: C:Programsopencv24 - it'll create a dir "opencv"; add another folder "opencv_bin". Now it looks like this:
C:Programsopencv24opencv*
C:Programsopencv24opencv_bin
Set PATH environment variable, so that there be a link to MinGW compiler. e.g. C:ProgramsQtQt5.0.1ToolsMinGWin;
Start cmake-gui.exe
6.1 source code: set the default dir for OpenCV; C:Programsopencv24opencv
6.2 binaries: set the opencv_bin dir; C:Programscopencv24opencv_bin
6.3 click configure:
- Choose MinGW Makefiles and Specify native compilers, click next
- Field C is for gcc.exe; C:/Programs/Qt/Qt5.0.1/Tools/MinGW/bin/gcc.exe
- Field C++ is for g++.exe; C:/Programs/Qt/Qt5.0.1/Tools/MinGW/bin/g++.exe

WITH_QT - 必須被選中.
WITH_TBB、WITH_IPP、WITH_CUDA - 必須取消選擇
CMAKE_BUILD_TYPE - 單擊并輸入文本調試"(不帶引號).

WITH_QT - must be selected.
WITH_TBB, WITH_IPP, WITH_CUDA - must be unselected
CMAKE_BUILD_TYPE - click and enter a text "Debug" (without quotes).

現在我在 QtCreator 中創建了一個新的控制臺應用程序.

Now I have created a new console app in QtCreator.

//cvHello.pro
QT       += core
QT       -= gui

TARGET = cvHello
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app
INCLUDEPATH += C:/Programs/opencv24/opencv_bin2/install/include
LIBS += "C:/Programs/opencv24/opencv_bin2/bin/*.dll"

SOURCES += main.cpp
OTHER_FILES += 
    img.JPG

和主文件:

//main.cpp
#include <iostream>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv/cv.h"

using namespace std;

int main()
{
    cout << "Hello World!" << endl;

    cv::Mat mat;
    mat = cv::imread("img.JPG");
    cvNamedWindow("hello");
    cv::imshow("hello",mat);

    cvWaitKey(0);

    return 0;
}

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如何在 QtCreator 中鏈接 opencv 并使用 Qt 庫

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