c++ - OpenCV Aborted (core dumped) When the Window Is Closed -


i try read camera frame , show through cv::namedwindow using cv::cuda::gpumat.

here c++ code:

cv::namedwindow("frame", cv::window_opengl); cv::resizewindow("frame", frame_width, frame_height); while (true) {     cv::mat frame;     cv::cuda::gpumat frame_gpu;      camera.read(frame);     frame_gpu.upload(frame);      cv::imshow("frame", frame_gpu);      //frame_gpu.download(frame);      if (cv::waitkey(1) == 27) {         break;     } } cv::destroyallwindows();

if close window got error:

opencv error: function/feature not implemented (you should explicitly call download method cuda::gpumat object) in getmat_, file /home/nvidia/opencv-3.2.0/modules/core/src/matrix.cpp, line 1276 terminate called after throwing instance of 'cv::exception' what():  /home/nvidia/opencv-3.2.0/modules/core/src/matrix.cpp:1276: error: (-213) should explicitly call download method cuda::gpumat object in function getmat_  aborted (core dumped)

if type esc key end logic, not raise exception.

why error , how can solve this?

i guess error trying display gpumat image using imshow. need download mat before can display using imshow. try this

cv::mat host; frame_gpu.upload(frame); frame_gpu.download(host) cv::imshow("frame", host);

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