Question

我尝试同时显示一个Viz3d窗口和一个带OpenCV的常规窗口（3.2或3.3，在Ubuntu 16.04上用QT 5编译）。当我这样做时，我的程序退出时会出现分段错误，即当我在常规（imshow）窗口中按下某个键时。这是一个最小的例子：

#include <iostream>
#include <opencv2/viz.hpp>
#include <opencv2/highgui.hpp>

using namespace std;
using namespace cv;
using namespace cv::viz;

int main()
{
  Viz3d visualization("Test");
  visualization.showWidget("Test object", WCone(1, 0.5, 100));
  visualization.setWindowPosition(Point2i(0, 0));
  visualization.spinOnce(1, true);

  cv::imshow("Test window", Mat(100, 100, CV_8UC1, Scalar(0)));
  moveWindow("Test window", 800, 0);

  while (!visualization.wasStopped())
  {
    if (waitKeyEx(1) != -1)
      break;
    visualization.spinOnce(1, true);
  }
  return 0;
}

仅使用imshow或仅使用Viz3d窗口可以正常工作。使用两种类型的窗户时是否需要设置任何特殊选项？我在文档中找不到与此相关的任何内容。

这是我在gdb中看到的调用堆栈：

Thread 1 "test" received signal SIGSEGV, Segmentation fault.
__GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:67
67  ../nptl/pthread_mutex_lock.c: No such file or directory.
(gdb) bt
#0  __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:67
#1  0x00007fffee79be27 in XrmDestroyDatabase () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#2  0x00007fffee50b3bb in ?? () from /usr/lib/x86_64-linux-gnu/libXt.so.6
#3  0x00007fffee50c04a in XtCloseDisplay () from /usr/lib/x86_64-linux-gnu/libXt.so.6
#4  0x00007fffee50c0c1 in ?? () from /usr/lib/x86_64-linux-gnu/libXt.so.6
#5  0x00007fffee50c25c in XtDestroyApplicationContext () from /usr/lib/x86_64-linux-gnu/libXt.so.6
#6  0x00007ffff54a06cd in vtkXRenderWindowInteractor::~vtkXRenderWindowInteractor() () from /usr/lib/x86_64-linux-gnu/libvtkRenderingOpenGL-6.2.so.6.2
#7  0x00007ffff54a06f9 in vtkXRenderWindowInteractor::~vtkXRenderWindowInteractor() () from /usr/lib/x86_64-linux-gnu/libvtkRenderingOpenGL-6.2.so.6.2
#8  0x00007ffff2111409 in vtkObjectBase::UnRegisterInternal(vtkObjectBase*, int) () from /usr/lib/x86_64-linux-gnu/libvtkCommonCore-6.2.so.6.2
#9  0x00007ffff21133a5 in vtkObject::UnRegisterInternal(vtkObjectBase*, int) () from /usr/lib/x86_64-linux-gnu/libvtkCommonCore-6.2.so.6.2
#10 0x00007ffff47004be in vtkRenderWindowInteractor::UnRegister(vtkObjectBase*) () from /usr/lib/x86_64-linux-gnu/libvtkRenderingCore-6.2.so.6.2
#11 0x00007ffff46f81ba in vtkRenderWindow::UnRegister(vtkObjectBase*) () from /usr/lib/x86_64-linux-gnu/libvtkRenderingCore-6.2.so.6.2
---Type <return> to continue, or q <return> to quit---
#12 0x00007ffff7b8e310 in cv::viz::Viz3d::VizImpl::~VizImpl() () from /usr/local/lib/libopencv_viz.so.3.2
#13 0x00007ffff7b8e3f9 in cv::viz::Viz3d::VizImpl::~VizImpl() () from /usr/local/lib/libopencv_viz.so.3.2
#14 0x00007ffff7b846ae in cv::viz::Viz3d::release() () from /usr/local/lib/libopencv_viz.so.3.2
#15 0x00007ffff7bbff0d in cv::viz::VizStorage::removeUnreferenced() () from /usr/local/lib/libopencv_viz.so.3.2
#16 0x00007ffff7b846c5 in cv::viz::Viz3d::release() () from /usr/local/lib/libopencv_viz.so.3.2
#17 0x0000000000402e0f in main () at test.cpp:11

结合OpenCV的Viz3d和imshow会产生分段错误

0 个答案: