qt opencv线程存图
时间: 2023-05-14 10:07:30 浏览: 75
可以使用Qt的QThread类来实现多线程存图,同时使用OpenCV的cv::Mat类来处理图像数据。具体实现可以参考以下代码:
```cpp
#include <QThread>
#include <opencv2/opencv.hpp>
class ImageThread : public QThread
{
Q_OBJECT
public:
ImageThread(QObject *parent = nullptr) : QThread(parent) {}
signals:
void imageSaved(QString filename);
protected:
void run() override
{
cv::VideoCapture cap(0);
if (!cap.isOpened())
{
emit imageSaved("Failed to open camera!");
return;
}
cv::Mat frame;
while (true)
{
cap >> frame;
if (frame.empty())
break;
// Process the image here...
QString filename = QString("image_%1.jpg").arg(QDateTime::currentDateTime().toString("yyyyMMdd_hhmmss_zzz"));
cv::imwrite(filename.toStdString(), frame);
emit imageSaved(filename);
}
}
};
```
在主线程中创建ImageThread对象并启动线程:
```cpp
ImageThread *thread = new ImageThread(this);
connect(thread, &ImageThread::imageSaved, this, &MyWidget::onImageSaved);
thread->start();
```
在onImageSaved槽函数中处理图像保存完成的信号:
```cpp
void MyWidget::onImageSaved(QString filename)
{
qDebug() << "Image saved:" << filename;
}
```
注意:以上代码仅供参考,具体实现可能需要根据实际需求进行修改。