Ubuntu 18.04.1 +安装opencv3.4.2+简单调用opencv库进行测试

1. 官网下载opencv源文件，我下载的是 opencv-3.4.2.zip

2. 根据 https://blog.csdn.net/cocoaqin/article/details/78163171中一步步操作

但是我按照上文中第4步（如下）输入时，出现报错

sudo apt-get install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg.dev libtiff4.dev libswscale-dev libjasper-dev

于是我改成分开输入，发现是安装libtiff4.dev 有问题，改成安装libtiff5-dev，可能是版本不一样

总体上将上文改成

sudo apt-get install build-essential
sudo apt-get install libgtk2.0-dev
sudo apt-get install libavcodec-dev
sudo apt-get install libavformat-dev
sudo apt-get install libjpeg.dev
sudo apt-get install libtiff5-dev
sudo apt-get install libswscale-dev
sudo apt-get install libjasper-dev

后续其他操作仍按照上文进行，最后能成功运行文中的example,算是成功了。

3. 引用安装的opencv中的库文件，创建测试程序

安装的库文件在

/usr/local

本人使用的是Qtcreator,创建Qt console Application,下面是.pro文件和main.cpp

//.pro文件
QT += core
QT -= gui

TARGET = Test_opencv
CONFIG += c++11 console
CONFIG -= app_bundle


# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0


INCLUDEPATH += /usr/local/include \
                /usr/local/include/opencv \
                /usr/local/include/opencv2



LIBS += /usr/local/lib/libopencv_highgui.so \
        /usr/local/lib/libopencv_core.so    \
        /usr/local/lib/libopencv_imgproc.so \
        /usr/local/lib/libopencv_imgcodecs.so

TEMPLATE = app

SOURCES += main.cpp

//main.cpp
#include<opencv2/core/core.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<iostream>
using namespace cv;
using namespace std;

int main()
{
    Mat a(Size(3,3),CV_8UC1);
    cout<<a;
    return 0;
}

Ubuntu 18.04.1 +安装opencv3.4.2+简单调用opencv库进行测试

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