1. Qt的ui界面，找着画就好
2.头文件直接贴出，之后有时间慢慢解释吧
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#pragma once
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#include <QtWidgets/QWidget>
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#include "ui_camaraGet.h"
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#ifndef CAMARAGET_H
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#define CAMARAGET_H
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#include <opencv2\core\core.hpp>
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#include <QWidget>
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#include <QImage>
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#include <QTimer> // 设置采集数据的间隔时间
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#include <QGraphicsScene>
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#include <QGraphicsView>
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#include <highgui/highgui_c.h> //包含opencv库头文件
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#include <opencv2\imgproc\imgproc.hpp>
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#include <opencv2\core\core.hpp>
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#include <opencv2\highgui\highgui.hpp> //opencv申明
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#include <opencv/cv.hpp>
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using
namespace cv;
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namespace Ui {
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class camaraGet;
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}
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class camaraGet :
public QWidget
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{
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Q_OBJECT
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public:
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explicit camaraGet(QWidget *parent = 0);
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~camaraGet();
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private slots:
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void openCamara();
// 打开摄像头
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void getFrame();
// 读取当前帧信息
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void closeCamara();
// 关闭摄像头。
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void takingPictures();
// 拍照
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private:
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Ui::camaraGet ui;
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QTimer *timer;
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QImage *imag;
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CvCapture *cam;
// 视频获取结构， 用来作为视频获取函数的一个参数
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IplImage *frame;
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VideoCapture capture1;
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Mat showimage;
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QImage Mat2Qimage(Mat cvImg);
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// camaraGet(QWidget * parent);
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//申请IplImage类型指针，就是申请内存空间来存放每一帧图像
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};
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#endif // CAMARAGET_H
3.源文件
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#pragma once
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#include <QtWidgets/QWidget>
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#include "ui_camaraGet.h"
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#ifndef CAMARAGET_H
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#define CAMARAGET_H
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#include <opencv2\core\core.hpp>
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#include <QWidget>
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#include <QImage>
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#include <QTimer> // 设置采集数据的间隔时间
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#include "camaraGet.h"
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#include<stdlib.h>
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#include<random>
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using
namespace cv;
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using
namespace
std;
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camaraGet::camaraGet(QWidget *parent):
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QWidget(parent)
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{
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ui.setupUi(
this);
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connect(ui.pushButton, SIGNAL(clicked()),
this, SLOT(openCamara()));
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connect(ui.pushButton_2, SIGNAL(clicked()),
this, SLOT(takingPictures()));
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connect(ui.pushButton_3, SIGNAL(clicked()),
this, SLOT(closeCamara()));
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setWindowTitle(tr(
"Main Window"));
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timer =
new QTimer(
this);
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imag =
new QImage();
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connect(timer, SIGNAL(timeout()),
this, SLOT(getFrame()));
//超时就读取当前摄像头信息
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}
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camaraGet::~camaraGet()
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{
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}
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void camaraGet::openCamara()
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{
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capture1.open(
1);
//打开摄像头，从摄像头中获取视频
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timer->start(
10);
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}
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void camaraGet::getFrame() {
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capture1 >> showimage;
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QImage imag = Mat2Qimage(showimage);
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ui.label_2->setScaledContents(
true);
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ui.label_2->setPixmap(QPixmap::fromImage(imag));
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}
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void camaraGet::closeCamara()
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{
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timer->stop();
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ui.label->clear();
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capture1.release();
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}
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string strRand(int length) {
// length: 产生字符串的长度
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char tmp;
// tmp: 暂存一个随机数
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string buffer;
// buffer: 保存返回值
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random_device rd;
// 产生一个 std::random_device 对象 rd
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default_random_engine random(rd());
// 用 rd 初始化一个随机数发生器 random
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for (
int i =
0; i < length; i++) {
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tmp = random() %
36;
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if (tmp <
10) {
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tmp +=
'0';
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}
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else {
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tmp -=
10;
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tmp +=
'A';
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}
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buffer += tmp;
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}
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return buffer;
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}
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void camaraGet::takingPictures()
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{
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capture1.open(
1);
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capture1 >> showimage;
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QImage img = Mat2Qimage(showimage);
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ui.label->setScaledContents(
true);
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ui.label->setPixmap(QPixmap::fromImage(img));
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string writePath =
"../tempPhoto/";
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string name;
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int i =
0;
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name = writePath + strRand(
4) +
".jpg";
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imwrite(name, showimage);
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i++;
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}
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QImage camaraGet::Mat2Qimage(Mat cvImg)
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{
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// 8-bits unsigned, NO. OF CHANNELS = 1
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if (cvImg.type() == CV_8UC1)
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{
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QImage image(cvImg.cols, cvImg.rows, QImage::Format_Indexed8);
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// Set the color table (used to translate colour indexes to qRgb values)
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image.setColorCount(
256);
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for (
int i =
0; i <
256; i++)
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{
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image.setColor(i, qRgb(i, i, i));
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}
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// Copy input Mat
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uchar *pSrc = cvImg.data;
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for (
int row =
0; row < cvImg.rows; row++)
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{
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uchar *pDest = image.scanLine(row);
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memcpy(pDest, pSrc, cvImg.cols);
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pSrc += cvImg.step;
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}
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return image;
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}
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// 8-bits unsigned, NO. OF CHANNELS = 3
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else
if (cvImg.type() == CV_8UC3)
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{
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// Copy input Mat
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const uchar *pSrc = (
const uchar*)cvImg.data;
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// Create QImage with same dimensions as input Mat
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QImage image(pSrc, cvImg.cols, cvImg.rows, cvImg.step, QImage::Format_RGB888);
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return image.rgbSwapped();
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}
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else
if (cvImg.type() == CV_8UC4)
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{
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// qDebug() << "CV_8UC4";
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// Copy input Mat
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const uchar *pSrc = (
const uchar*)cvImg.data;
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// Create QImage with same dimensions as input Mat
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QImage image(pSrc, cvImg.cols, cvImg.rows, cvImg.step, QImage::Format_ARGB32);
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return image.copy();
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}
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else
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{
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// qDebug() << "ERROR: Mat could not be converted to QImage.";
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return QImage();
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}
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}
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#include <QGraphicsScene>
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#include <QGraphicsView>
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#include <highgui/highgui_c.h> //包含opencv库头文件
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#include <opencv2\imgproc\imgproc.hpp>
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#include <opencv2\core\core.hpp>
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#include <opencv2\highgui\highgui.hpp> //opencv申明
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#include <opencv/cv.hpp>
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using
namespace cv;
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namespace Ui {
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class camaraGet;
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}
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class camaraGet :
public QWidget
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{
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Q_OBJECT
-
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public:
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explicit camaraGet(QWidget *parent = 0);
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~camaraGet();
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private slots:
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void openCamara();
// 打开摄像头
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void getFrame();
// 读取当前帧信息
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void closeCamara();
// 关闭摄像头。
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void takingPictures();
// 拍照
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private:
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Ui::camaraGet ui;
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QTimer *timer;
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QImage *imag;
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CvCapture *cam;
// 视频获取结构， 用来作为视频获取函数的一个参数
-
IplImage *frame;
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VideoCapture capture1;
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Mat showimage;
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QImage Mat2Qimage(Mat cvImg);
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// camaraGet(QWidget * parent);
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//申请IplImage类型指针，就是申请内存空间来存放每一帧图像
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};
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#endif // CAMARAGET_H
4.运行效果
完整项目下载：
转载：https://blog.csdn.net/zuoyou_yi/article/details/117338900
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