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
#pragma once
#include <qtwidgets/qwidget>
#include "ui_camaraget.h"
#ifndef camaraget_h
#define camaraget_h
#include <opencv2\core\core.hpp>
#include <qwidget>
#include <qimage>
#include <qtimer> // 设置采集数据的间隔时间
#include <qgraphicsscene>
#include <qgraphicsview>
#include <highgui/highgui_c.h> //包含opencv库头文件
#include <opencv2\imgproc\imgproc.hpp>
#include <opencv2\core\core.hpp>
#include <opencv2\highgui\highgui.hpp> //opencv申明
#include <opencv/cv.hpp>
using namespace cv;
namespace ui {
class camaraget;
}
class camaraget : public qwidget
{
q_object
public:
explicit camaraget(qwidget *parent = 0);
~camaraget();
private slots:
void opencamara(); // 打开摄像头
void getframe(); // 读取当前帧信息
void closecamara(); // 关闭摄像头。
void takingpictures(); // 拍照
private:
ui::camaraget ui;
qtimer *timer;
qimage *imag;
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;
videocapture capture1;
mat showimage;
qimage mat2qimage(mat cvimg);
// camaraget(qwidget * parent);
//申请iplimage类型指针，就是申请内存空间来存放每一帧图像
};
#endif // camaraget_h
3.源文件
#pragma once
#include <qtwidgets/qwidget>
#include "ui_camaraget.h"
#ifndef camaraget_h
#define camaraget_h
#include <opencv2\core\core.hpp>
#include <qwidget>
#include <qimage>
#include <qtimer> // 设置采集数据的间隔时间
#include "camaraget.h"
#include<stdlib.h>
#include<random>
using namespace cv;
using namespace std;
camaraget::camaraget(qwidget *parent):
qwidget(parent)
{
ui.setupui(this);
connect(ui.pushbutton, signal(clicked()), this, slot(opencamara()));
connect(ui.pushbutton_2, signal(clicked()), this, slot(takingpictures()));
connect(ui.pushbutton_3, signal(clicked()), this, slot(closecamara()));
setwindowtitle(tr("main window"));
timer = new qtimer(this);
imag = new qimage();
connect(timer, signal(timeout()), this, slot(getframe()));//超时就读取当前摄像头信息
}
camaraget::~camaraget()
{
}
void camaraget::opencamara()
{
capture1.open(1); //打开摄像头，从摄像头中获取视频
timer->start(10);
}
void camaraget::getframe() {
capture1 >> showimage;
qimage imag = mat2qimage(showimage);
ui.label_2->setscaledcontents(true);
ui.label_2->setpixmap(qpixmap::fromimage(imag));
}
void camaraget::closecamara()
{
timer->stop();
ui.label->clear();
capture1.release();
}
string strrand(int length) { // length: 产生字符串的长度
char tmp; // tmp: 暂存一个随机数
string buffer; // buffer: 保存返回值
random_device rd; // 产生一个 std::random_device 对象 rd
default_random_engine random(rd()); // 用 rd 初始化一个随机数发生器 random
for (int i = 0; i < length; i++) {
tmp = random() % 36;
if (tmp < 10) {
tmp += '0';
}
else {
tmp -= 10;
tmp += 'a';
}
buffer += tmp;
}
return buffer;
}
void camaraget::takingpictures()
{
capture1.open(1);
capture1 >> showimage;
qimage img = mat2qimage(showimage);
ui.label->setscaledcontents(true);
ui.label->setpixmap(qpixmap::fromimage(img));
string writepath = "../tempphoto/";
string name;
int i = 0;
name = writepath + strrand(4) + ".jpg";
imwrite(name, showimage);
i++;
}
qimage camaraget::mat2qimage(mat cvimg)
{
// 8-bits unsigned, no. of channels = 1
if (cvimg.type() == cv_8uc1)
{
qimage image(cvimg.cols, cvimg.rows, qimage::format_indexed8);
// set the color table (used to translate colour indexes to qrgb values)
image.setcolorcount(256);
for (int i = 0; i < 256; i++)
{
image.setcolor(i, qrgb(i, i, i));
}
// copy input mat
uchar *psrc = cvimg.data;
for (int row = 0; row < cvimg.rows; row++)
{
uchar *pdest = image.scanline(row);
memcpy(pdest, psrc, cvimg.cols);
psrc += cvimg.step;
}
return image;
}
// 8-bits unsigned, no. of channels = 3
else if (cvimg.type() == cv_8uc3)
{
// copy input mat
const uchar *psrc = (const uchar*)cvimg.data;
// create qimage with same dimensions as input mat
qimage image(psrc, cvimg.cols, cvimg.rows, cvimg.step, qimage::format_rgb888);
return image.rgbswapped();
}
else if (cvimg.type() == cv_8uc4)
{
// qdebug() << "cv_8uc4";
// copy input mat
const uchar *psrc = (const uchar*)cvimg.data;
// create qimage with same dimensions as input mat
qimage image(psrc, cvimg.cols, cvimg.rows, cvimg.step, qimage::format_argb32);
return image.copy();
}
else
{
// qdebug() << "error: mat could not be converted to qimage.";
return qimage();
}
}
#include <qgraphicsscene>
#include <qgraphicsview>
#include <highgui/highgui_c.h> //包含opencv库头文件
#include <opencv2\imgproc\imgproc.hpp>
#include <opencv2\core\core.hpp>
#include <opencv2\highgui\highgui.hpp> //opencv申明
#include <opencv/cv.hpp>
using namespace cv;
namespace ui {
class camaraget;
}
class camaraget : public qwidget
{
q_object
public:
explicit camaraget(qwidget *parent = 0);
~camaraget();
private slots:
void opencamara(); // 打开摄像头
void getframe(); // 读取当前帧信息
void closecamara(); // 关闭摄像头。
void takingpictures(); // 拍照
private:
ui::camaraget ui;
qtimer *timer;
qimage *imag;
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;
videocapture capture1;
mat showimage;
qimage mat2qimage(mat cvimg);
// camaraget(qwidget * parent);
//申请iplimage类型指针，就是申请内存空间来存放每一帧图像
};
#endif // camaraget_h
4.运行效果
完整项目下载：qtwidgetsapplication2_jb51.rar
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