[IGSTK-Users] Troubleshooting communication issue with Micron Tracker

[Andinet Enquobahrie]

Chris,

Thanks for the update!

-Andinet
> Andinet,
>
> The problem stemmed from IEEE-1394 bus resets.  These can occur with 
> cabling that is too long, repeaters that aren't quite up to spec, or 
> just bad connections.  It seems the Bumblebee driver can't gracefully 
> recover from this reset, which is why you have to manually reset the 
> tracking.  There is an article from PtGrey here: 
>  http://www.ptgrey.com/support/kb/index.asp?a=4&q=189&ST=freeze. 
> <http://www.ptgrey.com/support/kb/index.asp?a=4&q=189&ST=freeze>
>
> On the other hand, I was able to invoke an error event and create an 
> observer to reset the camera when the error was happening.  Thank you 
> for the help you provided and continue to provide.
>
> Chris
>
> On May 28, 2008, at 3:26 PM, Andinet Enquobahrie wrote:
>
>> Chris,
>>>
>>> Secondly, could you clarify what you mean in that second paragraph 
>>> by #567 (a.k.a. where do you think I should invoke that error event?)
>>>
>> Line # 567 in igstkMicronTracker.cxx
>>>
>>>
>>> On May 21, 2008, at 2:51 PM, Andinet Enquobahrie wrote:
>>>
>>>> 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
>>>>> _______________________________________________
>>>>> IGSTK-Users mailing list
>>>>> IGSTK-Users at public.kitware.com <mailto:IGSTK-Users at public.kitware.com>
>>>>> http://public.kitware.com/cgi-bin/mailman/listinfo/igstk-users
>>>>>
>>>>
>>>>
>>>> -- 
>>>> ==========================================================
>>>> 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 <http://www.kitware.com>
>>>>
>>>>
>>>
>>>
>>
>>
>> -- 
>> ==========================================================
>> 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 <http://www.kitware.com>
>>
>>
>


-- 
==========================================================
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