Gary Blah! Blah! Blah!

最近在練習使用OpenCV，順手紀錄一些用法。下面這段code可以用來控制電腦上的webcam進行拍照並且轉換成QImage物件，以便後續的使用。 #include <opencv2/opencv.hpp> CvCapture *camera; IplImage *frame; camera = cvCreateCameraCapture(-1);   /* We need to call cvRetrieveFrame twice here to get the last frame.  * TODO: figure out the root cause and use correct method instead of  *       the workaround.  */ cvGrabFrame(camera); frame = cvRetrieveFrame(camera); frame = cvRetrieveFrame(camera); if (frame) { QImage image(reinterpret_cast (frame->imageData), frame->width, frame->height, frame->widthStep, QImage::Format_RGB888); QImage colorCorrectedImage(image.rgbSwapped()); /* Show colorCorrectedImage which contains the picture. */ ... } cvReleaseCapture(&camera);