(4程序框架)从零开始的嵌入式图像图像处理(PI+QT+OpenCV)实战演练
从零开始的嵌入式图像图像处理(PI+QT+OpenCV)实战演练
1综述
http://www.cnblogs.com/jsxyhelu/p/7907241.html
2环境架设
http://www.cnblogs.com/jsxyhelu/p/7908226.html
3两个例子
http://www.cnblogs.com/jsxyhelu/p/8000804.html
4程序框架
http://www.cnblogs.com/jsxyhelu/p/7953805.html
5编译使用最新opencv
http://www.cnblogs.com/jsxyhelu/p/8000819.html
6综合实验
http://www.cnblogs.com/jsxyhelu/p/8000829.html
7拾遗
http://www.cnblogs.com/jsxyhelu/p/8007117.html
为了方便后期图像处理相关操作运用,将前面的程序封装成框架以复用
一、打开PI自带的摄像头
sudo raspi
-config
移动到“5”选项,按下回车键,选择camera。
选择“Enable”然后回车。
再选择“Yes”,回车后树莓派会重新启动。
通过raspi-config工具更新了操作并使能摄像头之后,它会告诉树莓派摄像头已经连接成功,并增加了两个命令行工具以供用户使用摄像头。
raspistill
raspivid
raspivid
如果是usb摄像c,现在已经可以直接使用。但是如果想集成度搞一些,直接使用csi的摄像头,需要这样做:
cd
/etc
/modules
-load.d
/
sudo vim modules.conf
sudo vim modules.conf
添加
bcm2835
-v4l2
![](http://imgconvert.csdnimg.cn/aHR0cHM6Ly9pbWFnZXMyMDE3LmNuYmxvZ3MuY29tL2Jsb2cvNTA4NDg5LzIwMTcxMi81MDg0ODktMjAxNzEyMDcxOTUzMjk3NjktNDI4NzgwNzk2LmpwZw?x-oss-process=image/format,png)
需要重启。
二、编写程序,获取并显示实时视频
主要程序代码:
#
ifndef CLICKEDLABEL_H
# define CLICKEDLABEL_H
# include <QWidget >
# include <QLabel >
class ClickedLabel : public QLabel
{
Q_OBJECT
public :
ClickedLabel(QWidget *parent = 0) : QLabel(parent){}
~ClickedLabel() {}
signals :
void clicked(ClickedLabel * click); // ????
protected :
void mouseReleaseEvent(QMouseEvent *); // ?????????
};
# endif // CLICKEDLABEL_H
# define CLICKEDLABEL_H
# include <QWidget >
# include <QLabel >
class ClickedLabel : public QLabel
{
Q_OBJECT
public :
ClickedLabel(QWidget *parent = 0) : QLabel(parent){}
~ClickedLabel() {}
signals :
void clicked(ClickedLabel * click); // ????
protected :
void mouseReleaseEvent(QMouseEvent *); // ?????????
};
# endif // CLICKEDLABEL_H
#
ifndef MAINWINDOW_H
# define MAINWINDOW_H
# include <QMainWindow >
//新添加
# include <opencv2 /core /core.hpp >
# include <opencv2 /highgui /highgui.hpp >
# include <opencv2 /imgproc /imgproc.hpp >
# include <QFileDialog >
# include <QImage >
# include <QTimer > // 时间触发
# include "clickedlabel.h"
using namespace cv;
//helper函数
QPixmap Mat2QImage(Mat src);
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public :
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots :
void on_MainWindow_iconSizeChanged( const QSize &iconSize);
void on_pushButton_clicked();
void on_pushButton_2_clicked();
void on_pushButton_3_clicked();
void on_pushButton_4_clicked();
void readFarme(); // 核心函数
private :
Ui : :MainWindow *ui;
QTimer *timer;
QImage *imag;
VideoCapture *videocapture;
Mat matFrame;
bool bMethod; //是否采用图像处理算法
ClickedLabel * clickLabel;
ClickedLabel * clickLabel2;
};
# endif // MAINWINDOW_H
# define MAINWINDOW_H
# include <QMainWindow >
//新添加
# include <opencv2 /core /core.hpp >
# include <opencv2 /highgui /highgui.hpp >
# include <opencv2 /imgproc /imgproc.hpp >
# include <QFileDialog >
# include <QImage >
# include <QTimer > // 时间触发
# include "clickedlabel.h"
using namespace cv;
//helper函数
QPixmap Mat2QImage(Mat src);
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public :
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots :
void on_MainWindow_iconSizeChanged( const QSize &iconSize);
void on_pushButton_clicked();
void on_pushButton_2_clicked();
void on_pushButton_3_clicked();
void on_pushButton_4_clicked();
void readFarme(); // 核心函数
private :
Ui : :MainWindow *ui;
QTimer *timer;
QImage *imag;
VideoCapture *videocapture;
Mat matFrame;
bool bMethod; //是否采用图像处理算法
ClickedLabel * clickLabel;
ClickedLabel * clickLabel2;
};
# endif // MAINWINDOW_H
#
include
"clickedlabel.h"
void ClickedLabel : :mouseReleaseEvent(QMouseEvent *)
{
emit clicked( this);
}
void ClickedLabel : :mouseReleaseEvent(QMouseEvent *)
{
emit clicked( this);
}
#
include
"mainwindow.h"
# include <QApplication >
int main( int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
# include <QApplication >
int main( int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
#
include
"mainwindow.h"
# include "ui_mainwindow.h"
using namespace cv;
Mat src;
Mat gray;
Mat tmp;
Mat dst;
MainWindow : :MainWindow(QWidget *parent) :
QMainWindow(parent),
ui( new Ui : :MainWindow)
{
ui - >setupUi( this);
timer = new QTimer( this);
imag = new QImage();
connect(timer, SIGNAL(timeout()), this, SLOT(readFarme()));
bMethod = false;
on_pushButton_clicked();
clickLabel = new ClickedLabel( this);
clickLabel - >setGeometry( 0, 0, 400, 400);
connect(clickLabel,SIGNAL(clicked(ClickedLabel *)), this,SLOT(on_pushButton_3_clicked()));
clickLabel2 = new ClickedLabel( this);
clickLabel2 - >setGeometry( 400, 0, 400, 400);
connect(clickLabel2,SIGNAL(clicked(ClickedLabel *)), this,SLOT(on_pushButton_2_clicked()));
}
MainWindow : : ~MainWindow()
{
delete ui;
}
void MainWindow : :on_MainWindow_iconSizeChanged( const QSize &iconSize)
{
}
//Open camera
void MainWindow : :on_pushButton_clicked()
{
videocapture = new VideoCapture( 0);
timer - >start( 33);
}
void MainWindow : :readFarme()
{
videocapture - >read(matFrame);
if(bMethod)
{
cvtColor(matFrame,tmp,COLOR_BGR2GRAY);
Canny(tmp,dst, 30, 255);
}
else
{
dst = matFrame.clone();
}
QPixmap qpixmap = Mat2QImage(dst);
clickLabel - >setPixmap(qpixmap);
}
//capture
void MainWindow : :on_pushButton_2_clicked()
{
QPixmap qpixmap = Mat2QImage(dst);
//ui->label_2->setPixmap(qpixmap);
clickLabel2 - >setPixmap(qpixmap);
}
//action
void MainWindow : :on_pushButton_3_clicked()
{
bMethod = !bMethod;
}
//exit
void MainWindow : :on_pushButton_4_clicked()
{
timer - >stop(); // ???????
videocapture - >release();
}
//helper??//
QPixmap Mat2QImage(Mat src)
{
QImage img;
if(src.channels() == 3)
{
cvtColor( src, tmp, CV_BGR2RGB );
img = QImage( ( const unsigned char *)(tmp.data), tmp.cols, tmp.rows, QImage : :Format_RGB888 );
}
else
{
img = QImage( ( const unsigned char *)(src.data), src.cols, src.rows, QImage : :Format_Indexed8 );
}
QPixmap qimg = QPixmap : :fromImage(img) ;
return qimg;
}
# include "ui_mainwindow.h"
using namespace cv;
Mat src;
Mat gray;
Mat tmp;
Mat dst;
MainWindow : :MainWindow(QWidget *parent) :
QMainWindow(parent),
ui( new Ui : :MainWindow)
{
ui - >setupUi( this);
timer = new QTimer( this);
imag = new QImage();
connect(timer, SIGNAL(timeout()), this, SLOT(readFarme()));
bMethod = false;
on_pushButton_clicked();
clickLabel = new ClickedLabel( this);
clickLabel - >setGeometry( 0, 0, 400, 400);
connect(clickLabel,SIGNAL(clicked(ClickedLabel *)), this,SLOT(on_pushButton_3_clicked()));
clickLabel2 = new ClickedLabel( this);
clickLabel2 - >setGeometry( 400, 0, 400, 400);
connect(clickLabel2,SIGNAL(clicked(ClickedLabel *)), this,SLOT(on_pushButton_2_clicked()));
}
MainWindow : : ~MainWindow()
{
delete ui;
}
void MainWindow : :on_MainWindow_iconSizeChanged( const QSize &iconSize)
{
}
//Open camera
void MainWindow : :on_pushButton_clicked()
{
videocapture = new VideoCapture( 0);
timer - >start( 33);
}
void MainWindow : :readFarme()
{
videocapture - >read(matFrame);
if(bMethod)
{
cvtColor(matFrame,tmp,COLOR_BGR2GRAY);
Canny(tmp,dst, 30, 255);
}
else
{
dst = matFrame.clone();
}
QPixmap qpixmap = Mat2QImage(dst);
clickLabel - >setPixmap(qpixmap);
}
//capture
void MainWindow : :on_pushButton_2_clicked()
{
QPixmap qpixmap = Mat2QImage(dst);
//ui->label_2->setPixmap(qpixmap);
clickLabel2 - >setPixmap(qpixmap);
}
//action
void MainWindow : :on_pushButton_3_clicked()
{
bMethod = !bMethod;
}
//exit
void MainWindow : :on_pushButton_4_clicked()
{
timer - >stop(); // ???????
videocapture - >release();
}
//helper??//
QPixmap Mat2QImage(Mat src)
{
QImage img;
if(src.channels() == 3)
{
cvtColor( src, tmp, CV_BGR2RGB );
img = QImage( ( const unsigned char *)(tmp.data), tmp.cols, tmp.rows, QImage : :Format_RGB888 );
}
else
{
img = QImage( ( const unsigned char *)(src.data), src.cols, src.rows, QImage : :Format_Indexed8 );
}
QPixmap qimg = QPixmap : :fromImage(img) ;
return qimg;
}
三、程序要点和结果展示
1、直接调用OpenCV的摄像头模块,实践证明在Linux上面很有效;
2、为了能够让label可以被点击,进行了一个类的重构工作;
![](https://www.cnblogs.com/jsxyhelu/p/35536932-6b10-4946-b0e2-61cc0e7477da_files/2.gif)
至此,程序框架搭建完成,可以方便复用,完整代码在链接为:
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