Saturday, September 21, 2013

OpenCV camera sync problem?

Hey guys, I'm using OpenCV to get an image from my webcam and then run it through code. It's supposed to be live feed, and I got this code from an online tutorial (somewhat revised):



#include #include #include #include //opencv libraries #include CvCapture* camCapture; //opencv class for retrieving image from external camera IplImage* origImage; //initialization of binary image int main() { camCapture = cvCaptureFromCAM(0); //automatically syncs with first installed camera; //for a second camera, argument would be '1'. printf("Your Error Messages Work."); //make sure print function works if(camCapture == NULL) //if there is no image coming from the synced camera, print error message { printf("Dude, your camera's not working."); getchar(); } cvNamedWindow("OK", 3); //create a window box named "OK", with 3 changeable values (R, G, B); //second param would be 2 for grayscale, 1 for black/white while(1) //loop forever { origImage = cvQueryFrame(camCapture); //the binary image is the current frame from the camera if(origImage==NULL) //if the image is blank, print error message { printf("Dude, I'm not getting an image."); getchar(); break; } cvShowImage("OK", origImage); //show the image in the window named "OK" } }




Here's what happens:

1). Regular dialog box comes up and prints: "Your Error Messages Work."

2). The light on my webcam turns on like its recording.

3). An alternate window appears named "OK".

4). The entire "OK" window turns slate-gray and is forever "loading". No image appears.

5). No error messages show up for code or image being null.



Has anyone worked with opencv before? Is it a problem with my webcam or with my code?

Thanks in advance!



--Ben
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