我在ubuntu 11.04上使用opencv 2.3。为了完整起见，在编译时，我将WITH_OPENNI = ON设置为。 (现在就后悔，因为我不打算很快使用kinect，而openni让我对普通的opencv程序感到头痛)

无论如何，为了测试opencv的安装，我编译了以下代码，向我展示了我的笔记本电脑网络摄像头的视频:

#include <stdio.h>
#include <string.h>
#include "highgui.h"
#include "cv.h"

int main()
{
cvNamedWindow("Webcam",CV_WINDOW_AUTOSIZE);
CvCapture* capture=cvCaptureFromCAM(0);
IplImage* frame;

while(1)
{
    frame=cvQueryFrame(capture);
    if(!frame) break;
    cvShowImage("Webcam",frame);
    char c=cvWaitKey(33);
    if(c==27) break;
}

cvReleaseCapture(&capture);
cvDestroyWindow("Webcam");
}

OpenCV Error: Unspecified error (Failed to enumerate production trees: Can't create any node of the requested type!) in CvCapture_OpenNI, file /home/samarth/OpenCV-2.3.0/modules/highgui/src/cap_openni.cpp, line 188 terminate called after throwing an instance of 'cv::Exception' what(): /home/samarth/OpenCV-2.3.0/modules/highgui/src/cap_openni.cpp:188: error: (-2) Failed to enumerate production trees: Can't create any node of the requested type! in function CvCapture_OpenNI

最佳答案

此问题已在OpenCV 2.3.1版本中修复。

有关详细信息，请参见以下链接:
https://code.ros.org/trac/opencv/ticket/1237

https://stackoverflow.com/questions/7137117/