[IGSTK-Users] Troubleshooting communication issue with Micron Tracker

[Andinet Enquobahrie]

Hi Chris,

"Error grabbing a frame" occurs when Cameras_GrabFrame method (MTC 
library method)
that is internally used by MCamera returns an error.  I personally never 
had such type of problem
once communication is established and tracking starts.   If the problem 
persists, we should ask
advice from Claron folks. Have you observed similar error with the demo 
application that comes
with the tracker or is it only your IGSTK-based application?

Your next question is how to restart tracking whenever there is such an 
error. You could invoke
an error event right after #567 ( right after igstkLogMacro..)and then 
setup an observer in your application
that listens to this error event. Then, use ResetTracking method as a 
callback to your observer.

This might work as a short term solution. But w should definitely 
troubleshoot why you are getting a
the error after communication is established and tracking starts

Let us know what you find out..

-Andinet

>  Hello all,
>
> I have created a program based largely on the 
> "OneViewAndTrackingNewUsingMicronTracker" example found in the 
> Sandbox.  The program works great for  while, until it stops 
> responding to input from the Claron.  The error given in the log is 
> listed as:
>
> (CRITICAL) Error grabbing a frame
>
> It seems that once there is an error grabbing a frame, the 
> communication fails completely, and I continually see the error over 
> and over again and am no longer able to track (which seems to go 
> against the point number 2 listed as a requirement for the 
> communication object).
>
> If I turn tracking off then on again, tracking will resume for a 
> while, until once again it fails in the same manner.
>
> The approach that I think may work in the short term, until I can 
> figure out why this error pops up at all, is to create a method in my 
> implementation.h file as follows:
>
> void ResetTracking()
> {
>     m_Tracker->RequestReset();
>     m_Tracker->RequestStartTracking();
> }
>
> I would want to call this method whenever the communication object 
> reports an error grabbing a frame.  My question is, how could I access 
> this error report?  I can see it in the logger, do I need to use the 
> logger object to do so or will the communication object return an 
> error code?  I would appreciate any advice.
>
> Thanks,
> Chris
> _______________________________________________
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> IGSTK-Users at public.kitware.com
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>


-- 
==========================================================
Andinet A. Enquobahrie, PhD
R&D Engineer
Kitware Inc.

28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x124
www.kitware.com