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封装相机采集模块，GrabOnce.cpp下面是一个完整的相机采集图像的流程（控制台模式），要求把这个流程封装成一个相机采图类，类接口要求：
1. 三个对外接口，相机初始化，开始采图，停止采图
2. 类的构造，析构函数要完整，成员变量（私有，公有）定义完善，私有函数和接口函数区分开
3. 界面需要有三个按钮，初始化相机按钮，开始采图按钮，停止采图按钮
4. 语言C++, 界面Qt
一、1. 相机采集类封装（C++/Qt）
//--------------------------- CameraCapture.h ---------------------------
#pragma once
#include <QObject>
#include <QImage>
#include <atomic>
#include "IKapBoard.h"
#include "IKapC.h"class CameraCapture : public QObject {Q_OBJECT
public:explicit CameraCapture(QObject *parent = nullptr);~CameraCapture();// 对外接口bool initCamera();void startGrabbing();void stopGrabbing();signals:void imageGrabbed(const QImage &image); // 图像采集信号void errorOccurred(const QString &msg); // 错误信号private:// IKapC 和 IKapBoard 资源ITKDEVICE m_cameraHandle = nullptr;HANDLE m_boardHandle = INVALID_HANDLE_VALUE;std::atomic_bool m_isGrabbing{false};bool m_isInitialized = false;// 私有方法bool configureCamera();bool configureFrameGrabber();void registerCallbacks();void releaseResources();// 回调函数包装器static void CALLBACK OnFrameReadyWrapper(void *context);void handleFrameReady();
};//--------------------------- CameraCapture.cpp ---------------------------
#include "CameraCapture.h"
#include <QDebug>CameraCapture::CameraCapture(QObject *parent) : QObject(parent) {}CameraCapture::~CameraCapture() {stopGrabbing();releaseResources();
}bool CameraCapture::initCamera() {if (m_isInitialized) return true;// 初始化 IKapCITKSTATUS res = ItkManInitialize();if (res != ITKSTATUS_OK) {emit errorOccurred("IKapC initialization failed");return false;}// 配置相机和采集卡if (!configureCamera() || !configureFrameGrabber()) {releaseResources();return false;}m_isInitialized = true;return true;
}void CameraCapture::startGrabbing() {if (!m_isInitialized || m_isGrabbing) return;ITKSTATUS res = ItkDevExecuteCommand(m_cameraHandle, "AcquisitionStart");if (res != ITKSTATUS_OK) {emit errorOccurred("Failed to start acquisition");return;}int ret = IKapStartGrab(m_boardHandle, 1);if (ret != 1) {emit errorOccurred("Failed to start grabbing");return;}m_isGrabbing = true;
}void CameraCapture::stopGrabbing() {if (!m_isGrabbing) return;int ret = IKapStopGrab(m_boardHandle);if (ret != 1) {emit errorOccurred("Failed to stop grabbing");}m_isGrabbing = false;
}//--------------------------- 私有方法实现 ---------------------------
bool CameraCapture::configureCamera() {// ... (参考 GrabOnce.cpp 中的 ConfigureCamera 实现)// 枚举设备、打开相机和采集卡return true;
}bool CameraCapture::configureFrameGrabber() {// ... (参考 GrabOnce.cpp 中的 ConfigureFrameGrabber 实现)// 配置缓冲区、超时、注册回调registerCallbacks();return true;
}void CameraCapture::registerCallbacks() {// 注册回调函数，传递 this 指针作为上下文IKapRegisterCallback(m_boardHandle, IKEvent_FrameReady, &CameraCapture::OnFrameReadyWrapper, this);
}void CameraCapture::releaseResources() {if (m_boardHandle != INVALID_HANDLE_VALUE) {IKapClose(m_boardHandle);m_boardHandle = INVALID_HANDLE_VALUE;}if (m_cameraHandle != nullptr) {ItkDevClose(m_cameraHandle);m_cameraHandle = nullptr;}ItkManTerminate();m_isInitialized = false;
}//--------------------------- 回调函数包装器 ---------------------------
void CALLBACK CameraCapture::OnFrameReadyWrapper(void *context) {CameraCapture *self = static_cast<CameraCapture*>(context);self->handleFrameReady();
}void CameraCapture::handleFrameReady() {unsigned char *buffer = nullptr;int frameSize = 0;IKAPBUFFERSTATUS status;// 获取图像数据IKapGetBufferStatus(m_boardHandle, 0, &status);if (status.uFull == 1) {IKapGetInfo(m_boardHandle, IKP_FRAME_SIZE, &frameSize);IKapGetBufferAddress(m_boardHandle, 0, (void**)&buffer);// 转换为 QImage（假设图像格式为 RGB888）QImage img(buffer, status.uWidth, status.uHeight, QImage::Format_RGB888);emit imageGrabbed(img); // 发送图像信号}
}二、QT界面实现
//--------------------------- MainWindow.h ---------------------------
#include <QMainWindow>
#include "CameraCapture.h"namespace Ui { class MainWindow; }class MainWindow : public QMainWindow {Q_OBJECT
public:MainWindow(QWidget *parent = nullptr);~MainWindow();private slots:void onInitClicked();void onStartClicked();void onStopClicked();void updateImage(const QImage &img);void handleError(const QString &msg);private:Ui::MainWindow *ui;CameraCapture *m_camera;
};//--------------------------- MainWindow.cpp ---------------------------
#include "MainWindow.h"
#include "ui_MainWindow.h"MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow), m_camera(new CameraCapture(this)) {ui->setupUi(this);// 初始化按钮状态ui->startButton->setEnabled(false);ui->stopButton->setEnabled(false);// 连接信号槽connect(ui->initButton, &QPushButton::clicked, this, &MainWindow::onInitClicked);connect(ui->startButton, &QPushButton::clicked, this, &MainWindow::onStartClicked);connect(ui->stopButton, &QPushButton::clicked, this, &MainWindow::onStopClicked);connect(m_camera, &CameraCapture::imageGrabbed, this, &MainWindow::updateImage);connect(m_camera, &CameraCapture::errorOccurred, this, &MainWindow::handleError);
}MainWindow::~MainWindow() {delete ui;
}void MainWindow::onInitClicked() {if (m_camera->initCamera()) {ui->startButton->setEnabled(true);ui->initButton->setEnabled(false);}
}void MainWindow::onStartClicked() {m_camera->startGrabbing();ui->startButton->setEnabled(false);ui->stopButton->setEnabled(true);
}void MainWindow::onStopClicked() {m_camera->stopGrabbing();ui->startButton->setEnabled(true);ui->stopButton->setEnabled(false);
}void MainWindow::updateImage(const QImage &img) {ui->imageLabel->setPixmap(QPixmap::fromImage(img).scaled(ui->imageLabel->size(), Qt::KeepAspectRatio));
}void MainWindow::handleError(const QString &msg) {QMessageBox::critical(this, "Error", msg);
}三、Qt 界面文件（MainWindow.ui）
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>MainWindow</class><widget class="QMainWindow" name="MainWindow"><widget class="QWidget" name="centralWidget"><layout class="QVBoxLayout"><item><widget class="QLabel" name="imageLabel"><property name="minimumSize"><size><width>640</width><height>480</height></size></property></widget></item><item><layout class="QHBoxLayout"><item><widget class="QPushButton" name="initButton"><property name="text"><string>Initialize</string></property></widget></item><item><widget class="QPushButton" name="startButton"><property name="text"><string>Start</string></property></widget></item><item><widget class="QPushButton" name="stopButton"><property name="text"><string>Stop</string></property></widget></item></layout></item></layout></widget></widget>
</ui>