C++ OpenCV mat到SFML图像
是否有方法将OpenCV mat格式化为SFML图像。或者是否有其他方式在SFML窗口中显示mat? 我尝试将mat数组转换为uchar数组,但结果是黑屏C++ OpenCV mat到SFML图像,c++,opencv,sfml,C++,Opencv,Sfml,是否有方法将OpenCV mat格式化为SFML图像。或者是否有其他方式在SFML窗口中显示mat? 我尝试将mat数组转换为uchar数组,但结果是黑屏 cv::VideoCapture cap(0); // open the video file for reading sf::Event event; sf::Image image; sf::Texture texture; sf::Sprite sprite; sprite.setText
cv::VideoCapture cap(0); // open the video file for reading
sf::Event event;
sf::Image image;
sf::Texture texture;
sf::Sprite sprite;
sprite.setTexture(texture);
cv::Mat frame;
sf::RenderWindow window(sf::VideoMode(1200, 900),"my Window");
cap >> frame;
uchar* camData = new uchar[frame.total()*4];
cv::Mat continuousRGBA(frame.size(), CV_8UC4, camData);
cv::cvtColor(frame, continuousRGBA, CV_BGR2RGBA, 4);
image.create(frame.cols,frame.rows,camData);
texture.loadFromImage(image);
while (window.isOpen()){
cap >> frame;
cv::cvtColor(frame, continuousRGBA, CV_BGR2RGBA, 4);
image.create(frame.cols,frame.rows,camData);
texture.loadFromImage(image);
while (window.pollEvent(event)){
if (event.type == sf::Event::Closed)
window.close();
}
window.draw(sprite);
window.display();
}
这很适合我:
cv::VideoCapture cap(0); // open the video file for reading
if(!cap.isOpened())
{
return 0;
}
sf::RenderWindow window(sf::VideoMode(1200, 900), "RenderWindow");
cv::Mat frameRGB, frameRGBA;
sf::Image image;
sf::Texture texture;
sf::Event event;
sf::Sprite sprite;
while (window.isOpen())
{
cap >> frameRGB;
if(frameRGB.empty())
{
break;
}
cv::cvtColor(frameRGB, frameRGBA, cv::COLOR_BGR2RGBA);
image.create(frameRGBA.cols, frameRGBA.rows, frameRGBA.ptr());
if (!texture.loadFromImage(image))
{
break;
}
sprite.setTexture(texture);
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
window.close();
}
window.draw(sprite);
window.display();
}
管理camData
时出现问题。您在循环外部分配内存,但是cv::cvtColor()
会一次又一次地重新分配continuousRGBA
,这就是为什么您会看到一个黑屏
cv::VideoCapture cap(0); // open the video file for reading
sf::Event event;
sf::Image image;
sf::Texture texture;
sf::Sprite sprite;
sprite.setTexture(texture);
cv::Mat frame;
sf::RenderWindow window(sf::VideoMode(1200, 900),"my Window");
cap >> frame;
uchar* camData = new uchar[frame.total()*4];
cv::Mat continuousRGBA(frame.size(), CV_8UC4, camData);
cv::cvtColor(frame, continuousRGBA, CV_BGR2RGBA, 4);
image.create(frame.cols,frame.rows,camData);
texture.loadFromImage(image);
while (window.isOpen()){
cap >> frame;
cv::cvtColor(frame, continuousRGBA, CV_BGR2RGBA, 4);
image.create(frame.cols,frame.rows,camData);
texture.loadFromImage(image);
while (window.pollEvent(event)){
if (event.type == sf::Event::Closed)
window.close();
}
window.draw(sprite);
window.display();
}