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capturing camera ?

asked 2013-02-19 01:57:36 -0500

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i'm using VS2010 conbined with OpenCV 2.2 ! i've tryied programming to capturing camera but the result as the picture below: image description i've configed property as follow:

*VC++ Directories:
 +Include Directories... add: 'C:\OpenCV2.1\include\opencv;'
 +Library Directories... add: 'C:\OpenCV2.1\lib;'
 +Source Directories... add folders in path "...\\include\\Opencv2"
*C/C++ =>General=>add “C:\OpenCV2.2\include”.
*Linker:
 +General=>Additional Library Directories => add “C:\OpenCV2.2\lib”.
*Input=>Additional Dependencies:
 opencv_imgproc220d.lib
 opencv_core220d.lib
 opencv_highgui220d.lib
 opencv_ml220d.lib
 opencv_video220d.lib
 opencv_features2d220d.lib
 opencv_calib3d220d.lib
 opencv_objdetect220d.lib
 opencv_contrib220d.lib
 opencv_legacy220d.lib
 opencv_flann220d.lib

And here is the code:

#include "stdafx.h"
#include "highgui.h"

int _tmain(int argc, _TCHAR* argv[])
{
CvCapture* capture = cvCaptureFromCAM(0);
IplImage* src = NULL;
cvNamedWindow("Webcam",0);
while(1)
{
    src = cvQueryFrame(capture);
    if(!src) break;
    char c = cvWaitKey(30);
    if(c == 27) break;
    cvShowImage("Webcam",src);
}
cvReleaseImage(&src);
cvDestroyWindow("Webcam");
return 0;
}

hope for help! ^~^ !

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well, you're supposed to click 'OK' there, so what's your 'real' question ? there's nothing obviously wrong with your code. ( well, apart from 2.2 being a bit old, and using IplImages instead of cv::Mat's )

berak gravatar imageberak ( 2013-02-19 03:43:37 -0500 )edit

Yes, i think the problem here is configuration for property! but i do not know which error i've got!

nqchanh gravatar imagenqchanh ( 2013-02-19 09:32:21 -0500 )edit

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answered 2013-02-19 16:05:17 -0500

this post is marked as community wiki

This post is a wiki. Anyone with karma >50 is welcome to improve it.

From the blurry picture it looks like Video Source selection dialog. Time honored way is to step thru the code - including the OpenCV, however MOST capAVI calls in OpenCV do not check the return values. And some of the OpenCV "wrappers" are notorous for that. cvCaptureFromCAM(0) is a prime example!

The code you have posted is a typical lazy way OpenCV (samples) are presented - for example CvCapture* capture = cvCaptureFromCAM(0); You should verify / assert / check if "capture" is set correctly. When dealing wiht hardware, functions returns are important. For all we know, you may be missing video driver for you camera.(But unlikely).

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Asked: 2013-02-19 01:57:36 -0500

Seen: 420 times

Last updated: Feb 19 '13