OpenCV多线程错误[使用Qt] [英] OpenCV Multithreading error [using Qt]

问题描述

到目前为止，我已经了解到一件事，我在使用OpenCV时出错了，Qt在错误中没有任何作用

我试图在不同的线程中运行两个方法，但这给了我错误:

I'm trying to run two methods in different threads, but it gives me error:

[xcb]出队时队列中的未知请求
[xcb]这很可能是多线程客户端，尚未调用XInitThreads
[xcb]正在中止，对此感到抱歉.
Blurring_Images:../../src/xcb_io.c:178:dequeue_pending_request:断言'！xcb_xlib_unknown_req_in_deq'失败.
该程序意外完成.

[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
Blurring_Images: ../../src/xcb_io.c:178: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.
The program has unexpectedly finished.

---

这是我的代码:

---

Here's my code:

void Dialog::blurImages(int b)
{
    QtConcurrent::run(this,&Dialog::homogenour_blur,b);
    QtConcurrent::run(this,&Dialog::gaussianBlur,b);
}

void Dialog::homogenour_blur(int b)
{
    cv::blur(img,img1,cv::Size(b,b));
    showImage("Homogenous Blur",img1);
}

void Dialog::gaussianBlur(int b)
{
    cv::GaussianBlur(img,img2,cv::Size(b,b),b);
    showImage("Gaussian Blur",img2);
}

而如果我注释掉一个电话(如下所示)，则运行正常

whereas if i comment out one call(shown below), it runs fine

void Dialog::blurImages(int b)
{
    QtConcurrent::run(this,&Dialog::homogenour_blur,b);
    //QtConcurrent::run(this,&Dialog::gaussianBlur,b);
}

这真是令人讨厌的家伙，请帮忙！

It's really annoying guys, please help !!

我没有调用showImage()，而是将其替换为实际的OpenCV调用(见下文):

Instead of calling showImage(), I replaced it with the actial OpenCV call(see below):

void Dialog::homogenour_blur(int b)
{
    cv::blur(img,img1,cv::Size(b,b));
    //showImage("Homogenous Blur",img1);
    cv::imshow("Homogenous Blur",img1);
}

void Dialog::gaussianBlur(int b)
{
    cv::GaussianBlur(img,img2,cv::Size(b,b),b);
    //showImage("Gaussian Blur",img2);
    cv::imshow("Gaussian Blur",img2);
}

现在我得到的错误是:

原始图像:X服务器:0上的致命IO错误11(资源暂时不可用).
原始图像:X服务器:0上的致命IO错误0(成功).
致命错误:销毁后访问了全局静态'KGlobalSettings * s_self()'.定义于../../kdeui/kernel/kglobalsettings.cpp:190
该程序意外完成.

Original Image: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
Original Image: Fatal IO error 0 (Success) on X server :0.
Fatal Error: Accessed global static 'KGlobalSettings *s_self()' after destruction. Defined at ../../kdeui/kernel/kglobalsettings.cpp:190
The program has unexpectedly finished.

推荐答案

线程已关闭.

我不知道为什么会出现此问题，但是我已经解决了..

I don't know why the problem occurred but I have got it fixed..

感谢RA.表现出极大的兴趣:)

Thanks to RA. for showing great interest :)

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