基于QT的一个简易的安防

￡神魔★判官ぃ 2022-01-05 14:25 274阅读 0赞

# 工程描述 #

1.  opencv2.4.8
2.  QT5

> 背景建模后，当有异物入侵时，把入侵的帧写到视频文件

# 使用BackgroundSubtractorMOG2背景建模 #

程序基于QT对话框

.pro

#-------------------------------------------------
    #
    # Project created by QtCreator 2014-06-19T16:00:40
    #
    #-------------------------------------------------
    
    QT       += core gui
    
    greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
    
    TARGET = opencvqt
    TEMPLATE = app
    INCLUDEPATH += f:/opencv/build/include/opencv
    INCLUDEPATH += f:/opencv/build/include/opencv2
    INCLUDEPATH += f:/opencv/build/include
    
    LIBS += -Lf:/opencv/build/x86/vc11/lib \
        -lopencv_core248d \
        -lopencv_highgui248d \
        -lopencv_imgproc248d \
        -lopencv_features2d248d \
        -lopencv_calib3d248d \
        -lopencv_contrib248d \
        -lopencv_flann248d \
        -lopencv_gpu248d \
        -lopencv_legacy248d \
        -lopencv_ml248d \
        -lopencv_nonfree248d \
        -lopencv_objdetect248d \
        -lopencv_ocl248d \
        -lopencv_photo248d \
        -lopencv_stitching248d \
        -lopencv_superres248d \
        -lopencv_ts248d \
        -lopencv_video248d \
        -lopencv_videostab248d
    
    
    SOURCES += main.cpp\
            dialog.cpp
    
    HEADERS  += dialog.h
    
    FORMS    += dialog.ui
    
    RESOURCES += \
        img.qrc

dialog.h

#ifndef DIALOG_H
    #define DIALOG_H
    
    #include <QDialog>
    #include <QTimer>
    #include <QPixmap>
    #include <QDebug>
    #include <opencv/cv.h>
    #include <opencv/highgui.h>
    #include <opencv2/opencv.hpp>
    using namespace cv;
    namespace Ui {
    class Dialog;
    }
    
    class Dialog : public QDialog
    {
        Q_OBJECT
    
    public:
        explicit Dialog(QWidget *parent = 0);
        ~Dialog();
        void initwebcam();
        void initBackgroundSubtractorMOG2();
        Mat frame ;
    private slots:
        void getFrame(); //实现定时从摄像头取图并显示在label上的功能。
    
    private:
        VideoCapture cap; //highgui 里提供的一个专门处理摄像头图像的结构体
        cv::BackgroundSubtractorMOG2 bg;
        VideoWriter writer; //摄像头每次抓取的图像为一帧，使用该指针指向一帧图像的内存空间
        Size videoSize;
        Ui::Dialog *ui;
        QTimer *timer;                              /* 定时器，更新界面 */
    };
    
    #endif // DIALOG_H

dialog.cpp

#include "dialog.h"
    #include "ui_dialog.h"
    
    static bool recodeflag=false;
    static cv::Mat frame;
    static cv::Mat back;
    static cv::Mat fore;
    static Mat copyimg;
    static std::vector<std::vector<cv::Point> > contours;
    
    
    static int count=0;
    
    
    Dialog::Dialog(QWidget *parent) :
        QDialog(parent),
        ui(new Ui::Dialog)
    {
        ui->setupUi(this);
        timer = new QTimer(this);
        initwebcam();
        initBackgroundSubtractorMOG2();
        connect(timer,SIGNAL(timeout()),this,SLOT(getFrame())); //超时就去取
        timer->start(5); //1000为1秒，10毫秒去取一帧
    
    
    
    }
    
    Dialog::~Dialog()
    {
        timer->stop(); //停止取帧
    
        delete ui;
    }
    
    void Dialog::initwebcam()
    {
        cap=VideoCapture(0);
        if(!cap.isOpened()){
    
            qDebug()<<"init webcam  error ,program exit...";
            return;
        }
        cap.set(CV_CAP_PROP_FRAME_WIDTH, 320);      /* set width */
        cap.set(CV_CAP_PROP_FRAME_HEIGHT, 240);     /* set height */
    
        videoSize=Size(320,240);
    
    
    
    
    
    }
    
    void Dialog::initBackgroundSubtractorMOG2()
    {
        bg.setInt("nmixtures", 3);
        bg.setBool("detectShadows", false);
    
    
        writer.open("result.avi",CV_FOURCC('D','I','V','X'),15,videoSize);
    }
    
    void Dialog::getFrame(){
         //从摄像头取帧
    //    static  QPixmap pixmapObject(":/image/webcam.png");
    //    ui->label_3->setPixmap(pixmapObject);
    
        cap>>frame;
        frame.copyTo(copyimg);
        QImage image = QImage((const uchar*)frame.data, frame.cols, frame.rows, QImage::Format_RGB888).rgbSwapped(); //简单地转换一下为Image对象，rgbSwapped是为了显示效果色彩好一些。
        ui->label->setPixmap(QPixmap::fromImage(image));
        bg.operator ()(frame,fore);
        bg.getBackgroundImage(back);
        cv::erode(fore,fore,cv::Mat());
        cv::dilate(fore,fore,cv::Mat());
        cv::findContours(fore,contours,CV_RETR_EXTERNAL,CV_CHAIN_APPROX_NONE);
        if (contours.size()>0 &&count>0)
                {
                    //如果轮廓的面积太小了也不用写到输出视频
                    for (int i = 0; i< contours.size(); i++)
                    {
                        double a=contourArea( contours[i],false);
                        if (a>500)//面积小于1000
                        {
                            cv::drawContours(frame,contours,i,cv::Scalar(0,0,255),2);
                            recodeflag=true;
                        }
                        else
                        {
                            recodeflag=false;
                        }
                    }
    
                }
                else
                {
                    recodeflag=false;
    
                }
        if(recodeflag){
            QImage imagelable2 = QImage((const uchar*)frame.data, frame.cols, frame.rows, QImage::Format_RGB888).rgbSwapped();
    
            ui->label_2->setPixmap(QPixmap::fromImage(imagelable2));
        }else {
            //static  QPixmap pixmapObject(":/image/webcam.png");
           // ui->label_2->setPixmap(pixmapObject);
            ui->label_2->setText("<h1><center><font color='red'>NOTHING</font></center></h1>");
    
        }
    
    
        if (recodeflag)
            {
                //std::string outfile(cv::format("%d.jpg",imagecount));
                //writer<<frame;
                writer<<copyimg;
                //imwrite(outfile,frame);
                //imagecount++;
            }
            count++;
    }

效果图

背景建模

![Wk0FcwzRrf.jpg][]

异物入侵

![JubfHZStMZ.jpg][]

生成异物入侵的视频文件

![VqHZtabAi6.jpg][]

![7RNWYVlEFt.jpg][]

转载于:https://www.cnblogs.com/yuliyang/p/3798793.html

[Wk0FcwzRrf.jpg]: http://bcs.duapp.com/yuliyang-ftp/Wk0FcwzRrf.jpg
[JubfHZStMZ.jpg]: http://bcs.duapp.com/yuliyang-ftp/JubfHZStMZ.jpg
[VqHZtabAi6.jpg]: http://bcs.duapp.com/yuliyang-ftp/VqHZtabAi6.jpg
[7RNWYVlEFt.jpg]: http://bcs.duapp.com/yuliyang-ftp/7RNWYVlEFt.jpg