简体繁体 English

多线程：如何在wxthread中使GUI线程无图像显示和工作线程处理图像同步

[英]Multithreading: how to make GUI thread for showing image non-blocking and worker thread for processing image synchronization in wxthread

原文 2015-08-02 12:52:37 6 1 c++/ multithreading/ wxwidgets

I am getting started with the wxThread. 我开始使用wxThread。

I have shown the video in the GUI thread with wxWidgets. 我已经使用wxWidgets在GUI线程中显示了视频。 And now I want to handle each frame with opencv like drawing one circle in each frame. 现在我想用opencv处理每一帧，就像在每一帧中画一个圆一样。 At the beginning, I have done the processing in the GUI thread. 开始时，我已经在GUI线程中完成了处理。 But when I run the program, I find that the image in the GUI isnot shown continuously and some image doesnot include the circle. 但是，当我运行该程序时，发现GUI中的图像没有连续显示，并且某些图像不包含圆圈。

I have realized that image processing part is not put into the GUI thread. 我已经意识到图像处理部分没有放入GUI线程中。 I should creat a new thread to complete the image processing part. 我应该创建一个新线程来完成图像处理部分。

But I don't know how to how to make GUI thread and worker thread synchronization, it means that it can make the GUI thread non-blocking and the worker thread process the frame with opencv. 但是我不知道如何使GUI线程和工作线程同步，这意味着它可以使GUI线程无阻塞，并且工作线程使用opencv处理帧。 Although I konw the wxthread tutorial, I couldnot deal with the problem about how to share the data between the two wxThread. 尽管我了解wxthread教程，但是我无法处理有关如何在两个wxThread之间共享数据的问题。

Could anyone have some ideas about it or some reference? 有人能对此有一些想法或参考吗？ Thx. 谢谢。

1 个解决方案

There is a pretty extensive section on thread synchronization in the wx-wiki https://wiki.wxwidgets.org/Inter-Thread_and_Inter-Process_communication 在wx-wiki https://wiki.wxwidgets.org/Inter-Thread_and_Inter-Process_communication中有关于线程同步的相当广泛的部分

For background-tasks I like to use the "post event to main thread" approach This might also work for you. 对于后台任务，我喜欢使用“将事件发布到主线程”方法，这也可能对您有用。 - Send an event whenever your work-thread is done with the processing of a single image and display the image in the event-handler method -只要您的工作线程完成了单个图像的处理，就发送一个事件，并在事件处理程序方法中显示该图像