multithreading - Display Opencv image send by event to Qt GUI -

i trying days find proper solution following problem(stated below), , have no more ideas now. therefore, need more experienced devs:

i have class independant qt (and want stay this) generate opencv images in secundary thread. raise event pass images.

    while (1)         {             if (timeractived & this->_camready)             {                 vector<mat>* images = new vector<mat>;                 images = this->acquireimg();                 __raise this->frameacquired(images);             }             this_thread::sleep_for(chrono::milliseconds(_frametimelaps));         } 

this event hooked mainwindow , method supposed display images on gui.

    void mainwindow::displayframe(vector<mat>* frames) {         vector<mat>* frames2 = new vector<mat>();         frames2 = frames;         (int = 0; < frames2->size(); ++i) {             this->camframes->at(i)->showimage(frames2->at(i));         }     } 

during runtime, when main thread access images following error :

assert failure in qcoreapplication::sendevent: "cannot send events objects owned different thread.

i understand not using threads properly, have no idea how create asynchronous event now.

thank help, valentin

edit 1 :

it seems me real question : can use normal std::thread , native event communicate main qthread ?

here solution solve problem, after all.

the idea give main thread access mat coming second thread. modified function displayframe :

    void mainwindow::displayframe(vector<mat>* frames) {          //qthread::         qthread* this_thread = qthread::currentthread();         framewrapper* worker = new framewrapper();          worker->movetothread(this_thread);          qobject::connect(worker, signal(framesent(vector<mat>*)), this, slot(showimg(vector<mat>*)));          emit worker->framesent(frames);         //this->camframes->at(0)->showimage(frame);     } 

the new function showimg doing job of old displayframe. signal/slot process permit access image gui thread wanted.