opencv 自学日记5-读取图片，并做边缘处理

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我是靠谱客的博主淡定小鸽子，最近开发中收集的这篇文章主要介绍opencv 自学日记5-读取图片，并做边缘处理，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

对pro文件添加外部库做了优化，以减少pro文件中的冗余代码：

QT += core
QT -= gui

CONFIG += c++11

TARGET = opencvReadImage
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

LIBPATH = ../../../Program Files (x86)/opencv/opencv-3.2.0-vc14/opencv/minGW/lib/

INCLUDEPATH += $$PWD/'../../../Program Files (x86)/opencv/opencv-3.2.0-vc14/opencv/minGW/include'
DEPENDPATH += $$PWD/'../../../Program Files (x86)/opencv/opencv-3.2.0-vc14/opencv/minGW/include'

unix|win32: LIBS += -L$$PWD/'$$LIBPATH' -llibopencv_highgui320.dll 
                     -llibopencv_imgcodecs320.dll 
                     -llibopencv_imgproc320.dll 
                     -llibopencv_core320.dll

Demo：

#include <QCoreApplication>
#include "opencv2/highgui.hpp"
#include "opencv2/core.hpp"
#include "opencv2/opencv.hpp"

using namespace std;
using namespace cv;

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    Mat im = imread("11.jpg",0);
    if(im.empty())
    {
        cout << "im empty!";
        return -1;
    }

    Mat result;
    Canny(im,result,50,150);

    imwrite("xxx.png",result);


    return 0;
}

运行效果如下：