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);

Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more