Qt Camera Access: Video Processor Class for Image Capture and Processing

#ifndef VIDEO_PROCESSOR_H #define VIDEO_PROCESSOR_H

#include #include #include #include

class VideoProcessor : public QObject { Q_OBJECT public: explicit VideoProcessor(QObject *parent = nullptr); ~VideoProcessor();

signals: void frameProcessed(const QImage& frame);

public slots: void startCamera();

private slots: void processFrame(int requestId, const QImage& img);

private: QCamera* m_camera; QCameraImageCapture* m_imageCapture; };

#endif // VIDEO_PROCESSOR_H

#include "video_processor.h"

VideoProcessor::VideoProcessor(QObject *parent) : QObject(parent) { m_camera = new QCamera(this); m_imageCapture = new QCameraImageCapture(m_camera, this);

connect(m_imageCapture, SIGNAL(imageCaptured(int, const QImage&)), this, SLOT(processFrame(int, const QImage&)));

}

VideoProcessor::~VideoProcessor() { delete m_imageCapture; delete m_camera; }

void VideoProcessor::startCamera() { m_camera->start(); }

void VideoProcessor::processFrame(int requestId, const QImage& img) { emit frameProcessed(img); }

#include #include #include "video_processor.h"

int main(int argc, char *argv[]) { QCoreApplication a(argc, argv);

VideoProcessor videoProcessor;

QObject::connect(&videoProcessor, &VideoProcessor::frameProcessed, [](const QImage& frame) {
    // 处理每一帧图像
    // 在这里可以使用frame进行图像处理操作，如显示、保存等
});

videoProcessor.startCamera();

QEventLoop loop;
QObject::connect(&a, &QCoreApplication::aboutToQuit, &loop, &QEventLoop::quit);
return loop.exec();

}