根據網上搭建時老是報這個錯

解決方案 報那個錯的原因就幾個 1.沒有實現函數 這個可以排除。
2.沒有包含庫 對就是這個 但不是只包含網上說的那幾個 得全包含（反正包含到不報錯為止）


macx{
INCLUDEPATH += /usr/local/opt/opencv@3/include
LIBS += -L/usr/local/Cellar/opencv/3.4.1/lib -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_dnn -lopencv_dpm -lopencv_fuzzy -lopencv_line_descriptor -lopencv_optflow -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_rgbd -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_face -lopencv_xfeatures2d -lopencv_shape -lopencv_video -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core

#-------------------------------------------------
#
# Project created by QtCreator 2018-03-10T18:59:53
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = testopencv
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as 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

SOURCES += main.cpp        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui
#INCLUDEPATH += /usr/local/include
#INCLUDEPATH += /usr/local/include/opencv
#INCLUDEPATH += /usr/local/include/opencv2

#LIBS += -L/usr/local/lib #     -lopencv_core #     -lopencv_highgui #     -lopencv_imgproc ##     -lopencv_calib3d

#LIBS += -L/usr/local/lib
# LIBS +=-lopencv_core  -lopencv_highgui  -lopencv_imgproc  -v
macx{
 INCLUDEPATH += /usr/local/opt/opencv@3/include
LIBS += -L/usr/local/Cellar/opencv/3.4.1/lib -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib  -lopencv_dnn -lopencv_dpm -lopencv_fuzzy -lopencv_line_descriptor -lopencv_optflow -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_rgbd -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_face -lopencv_xfeatures2d -lopencv_shape -lopencv_video -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core
}
 

//#include "mainwindow.h"
//#include <QApplication>

//int main(int argc, char *argv[])
//{
//    QApplication a(argc, argv);
//    MainWindow w;
//    w.show();

//    return a.exec();
//}

#include <iostream>
#include <string>
#include <vector>
using namespace std;

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace cv;

int main(int argc, char *argv[])
{
//    Mat src = imread("Users/allenboy/Desktop/allen.jpeg");
//    if(src.empty())
//    {
//        cerr << "Please check the path of input image!" << endl;
//        return -1;
//    }
//    const string winname = "src";
//    namedWindow(winname, WINDOW_AUTOSIZE);
//    imshow(winname, src);
//    waitKey(0);
//    destroyWindow(winname);
//    cv::Mat img = cv::imread("/Users/tianzhaixing/Pictures/jurassic_world.jpg");
//     cv::imshow("Image", img);
//     cv::waitKey(0);

    VideoCapture capture(0);                        //打開攝像頭
     Mat frame;                                      //定義儲存圖像的mat類型變量
     //double rate = capture.get(CAP_PROP_FPS);      //定義幀率，如果是打開視頻文件
     Size videoSize(capture.get(CAP_PROP_FRAME_WIDTH), capture.get(CAP_PROP_FRAME_HEIGHT));
     VideoWriter writer("Users/allenboy/Desktop/VideoTest.avi", CV_FOURCC(‘M‘, ‘J‘, ‘P‘, ‘G‘), 20, videoSize);
     //(5個參數分別為文件名，視頻格式，幀率，幀尺寸，bool isColortrue（默認的）如果想保存一個彩色視頻，這個值為true，否則為false。)20相當於rate，表示幀率

     if (!writer.isOpened())                         //測試是否打開寫文件成功
     {
         cout << "寫入視頻文件打開失敗！" << endl;
         return -1;
     }

     int kernel=0;                                  //定義一個變量存儲內核值
     for (int i = 0; i <200;i++)                    //拍攝一個10秒的視頻，因為上面定義的幀率為20，所以循環200次正好是10秒
     {
         capture >> frame;                          //讀入幀
         imshow("原圖", frame);                     //顯示

         kernel = (i /10)+1;                        //設置濾波的內核尺寸kernel，使逐漸增大，內核最小為1，不能為0
         blur(frame, frame, Size(kernel,kernel));   //采用一次均值濾波
         writer << frame;                           //寫入視頻文件

         //cvtColor(frame, frame, CV_BGR2GRAY);     //彩色轉為灰度圖
         imshow("中值濾波圖", frame);               //顯示

         waitKey(30);                               //等待顯示

     }

    return 0;
}
 

mac 下用 qt 搭建 opencv