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Facedetection on video: System freezes after processing some frames

Question asked by mainul on Jul 8, 2014
Latest reply on Jul 9, 2014 by dipak

I am trying to run face detection on a 5 minute 720P video. I am using opencv API and opencl kernels to do my job. When I try to run the program, it runs fine for intial few number of frames. But after some frames, the full system freezes. I am using a desktop with AMD A10-6800K APU with Radeon(tm) HD Grap which contains devastator GPU.

I also applied clFInish after each kernel to make sure the synchronization. But that did not help either. The system freezes.

Whenever the system freezes I restarts teh machine.

Please suggest me what could be the possible cause of the error? Any help would be appreciated.

 

Here is my psuodo code:

 

Main()
{
for (;;)
{
  grab a frame;
  detectface(frame);
  writing the frame to output;
}
}

  detectface(frame)
{
  tranfer frame to oclMatrix; //the error occurs at this point, my guess.

  while some conditions are true:
  while some conditions are true:
   kernel1; //parameter: one oclmatrix for source, one for output, two temporary ocl matrix for calculation
   kernel2;//parameter: one oclmatrix for source, one for output, one temporary ocl matrix for calculation
   kernel3;//parameter: one oclmatrix for source, one for output, two temporary ocl matrix for calculation
   kernel4;//parameter: one oclmatrix for source, one for output, one temporary ocl matrix for calculation
  end;
  kernel5; //this does the detection and gives a output. parameter: one oclmatrix for source, one for output, 4 temporary ocl matrix for cascade classifier.
  end;

}

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