这是我使用Qt的方式。你可以使用对你有用的任何东西 :)
#ifndef OPENCV_GLWIDGET_H_
#define OPENCV_GLWIDGET_H_
#include <qgl.h>
#include <QImage>
class OpenCV_GLWidget: public QGLWidget {
public:
OpenCV_GLWidget(QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WindowFlags f = 0);
virtual ~OpenCV_GLWidget();
void renderImage(const QImage& frame);
protected:
virtual void paintGL();
virtual void resizeGL(int width, int height);
private:
QImage m_GLFrame;
};
#endif
#include "OpenCV_GLWidget.h"
OpenCV_GLWidget::OpenCV_GLWidget(QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f) :
QGLWidget(parent, shareWidget, f)
{
}
OpenCV_GLWidget::~OpenCV_GLWidget() {
}
void OpenCV_GLWidget::renderImage(const QImage& frame)
{
m_GLFrame = QGLWidget::convertToGLFormat(frame);
this->updateGL();
}
void OpenCV_GLWidget::resizeGL(int width, int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, width, height, 0, 0, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void OpenCV_GLWidget::paintGL() {
glClear (GL_COLOR_BUFFER_BIT);
glClearColor (0.0, 0.0, 0.0, 1.0);
if (!m_GLFrame.isNull()) {
m_GLFrame = m_GLFrame.scaled(this->size(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
glEnable(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, m_GLFrame.width(), m_GLFrame.height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, m_GLFrame.bits() );
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex2f(0, m_GLFrame.height());
glTexCoord2f(0, 1); glVertex2f(0, 0);
glTexCoord2f(1, 1); glVertex2f(m_GLFrame.width(), 0);
glTexCoord2f(1, 0); glVertex2f(m_GLFrame.width(), m_GLFrame.height());
glEnd();
glDisable(GL_TEXTURE_2D);
glFlush();
}
}
这个类处理将图像呈现到推广QWidget上的任务。接下来,我创建了一个线程来为小部件提供数据。(我在这里使用了Qt信号槽架构作弊,因为它很容易...可能不是最佳表现者,但应该能帮助您入门)。
void VideoThread::run()
{
cv::VideoCapture video(0);
while(!m_AbortCapture)
{
cv::Mat cvFrame;
video >> cvFrame;
cv::Mat gray(cvFrame.size(), CV_8UC1);
cv::GaussianBlur(cvFrame, cvFrame, cv::Size(5, 5), 9.0, 3.0, cv::BORDER_REPLICATE);
cv::cvtColor(cvFrame, gray, CV_RGB2GRAY);
m_ThresholdLock.lock();
double localThreshold = m_Threshold;
m_ThresholdLock.unlock();
if(localThreshold > 0.0)
{
qDebug() << "Threshold = " << localThreshold;
cv::threshold(gray, gray, localThreshold, 255.0, cv::THRESH_BINARY);
}
cv::cvtColor(gray, cvFrame, CV_GRAY2BGR);
QImage qtFrame(cvFrame.data, cvFrame.size().width, cvFrame.size().height, cvFrame.step, QImage::Format_RGB888);
qtFrame = qtFrame.rgbSwapped();
emit sendImage(qtFrame);
msleep(20);
}
}
花费了我一些时间才搞清楚,希望这能帮助你和其他人节省一些时间 :D
VideoCapture
(例如,您可以使用CMU1394、特定供应商驱动程序等),但如果它直接支持您的摄像头,则非常方便。 - mevatron