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Re: [Toon-members] bug in ransac_estimators.h ?


From: Gerhard Reitmayr
Subject: Re: [Toon-members] bug in ransac_estimators.h ?
Date: Thu, 29 Jan 2009 08:41:46 +0000
User-agent: Thunderbird 2.0.0.16 (X11/20080720)

Yes, Ed is currently implementing that, so maybe we will have something
soon...

cheers,
  Gerhard

Ethan Eade wrote:
> 
> Yes, it was an old implementation of mine of the algorithm from
> 'Invariant Fitting of Two View Geometry or “In Defiance of the eight
> point algorithm”' (Torr, Fitzgibbon 2004). I believe it worked then, but
> I make no guarantees about the current version.
> 
> In any case, you're probably better off using the five-point algorithm
> (Nister 2003), which will work with planar scenes. I never got around to
> adding that code to libtag, though.
> 
> - Ethan
> 
> 
> Gerhard Reitmayr wrote:
>> Hi,
>>
>> Thanks for the heads-up, yes it should use the functions and I fixed
>> it now.
>>
>> be warned that the essential matrix estimator is not well tested. it
>> was integrated from other code and some reports say it doesn't work :/
>>
>> best regards,
>> Gerhard
>>
>> On 29 Jan 2009, at 07:06, <address@hidden> wrote:
>>
>>> Hello,
>>>
>>> Thanks for the great libraries. I may have caught a small bug, unless
>>> I am
>>> not understanding correctly. In tag/ransac_estimators.h, line 26:
>>>
>>> TooN::Vector<2> dm = m.b-e;
>>>
>>> Should this be:
>>>
>>> TooN::Vector<2> dm = second_point(m)-e;
>>>
>>> ? (And similarly elsewhere in that function.)
>>>
>>> Best,
>>> Jonathan Ventura
>>> Department of Computer Science
>>> University of California
>>> Santa Barbara, CA 93106-5110
>>>
>>>
>>>
>>> _______________________________________________
>>> Toon-members mailing list
>>> address@hidden
>>> http://lists.nongnu.org/mailman/listinfo/toon-members
>>
>> -- 
>> Gerhard Reitmayr
>> MIL, Engineering Department, Cambridge University
>> http://mi.eng.cam.ac.uk/~gr281/
>>
>>
>>
>>
>> _______________________________________________
>> Toon-members mailing list
>> address@hidden
>> http://lists.nongnu.org/mailman/listinfo/toon-members
> 


-- 
Gerhard Reitmayr
MIL, Engineering Department, Cambridge University
http://www.eng.cam.ac.uk/~gr281/
tel: +44 1223 765150




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