[Insight-users] Registration works on Debug, on Release doesn't

[Luis Ibanez]

Oscar,


I second Sergio,
This looks like a problem related to uninitialized variables.


You may also want to try running the program by using
Valgrind. That's a very effective way of finding uninitilized
variables.


   Regards,


     Luis



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On Fri, May 28, 2010 at 3:34 AM, Sergio Vera <sergio.vera at alma3d.com> wrote:

> Hello
>
> May I suggest to enable all warnings when you compile the code?
>
> Often this problems are related to variables that are by default
> initialized to some meaning value in debug builds, but that keep
> uninitialized (so they have garbage values) in Release builds.
>
> Enabling all warings may let you see this kind of errors more easily
>
> Hope it helps
> Sergio
>
>
> On Thu, May 27, 2010 at 6:53 PM, Oscar Esteban Sanz-Dranguet <
> oesteban at die.upm.es> wrote:
>
>> Hi,
>>
>> Based on Examples\Registration\ImageRegistrationHistogramPlotter.cxx, I'm
>> trying to perform a registration between a T1 MRI slice and a 13,8 degrees
>> rotated PET slice.
>>
>> I've configured every block, and I get a great result in Debug mode.
>>
>> When I try to use the same code, under the same conditions except build
>> type (now, in Release mode), the registration doesn't work.
>>
>> On debug mode, the optimizer (RegularStepGradientDescentOptimizer) starts
>> with a rotation of 0.175 rad. Next step, it tries with 0.350 rad and next
>> step returns to ~0.19 rad. After 50 iterations, rotation is about 0,24 and
>> result is great.
>>
>> On Release mode, it starts with a rotation of -0.175 rad, and every step
>> it sums up another -0.175 rad. It stops when the maximum iterations number
>> is reached.
>>
>> I can't find why this is happening, because all parameters are the same
>> for the two experiments.
>>
>> Thank you very much in advanced,
>>
>> --
>> Oscar Esteban
>> BIT - UPM (http://www.die.upm.es/im/)
>> +34 915 495700  ext.4248
>>
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>
>
>
> --
> Sergio Vera
>
> Alma IT Systems
> C/ Vilana, 4B, 4º 1ª
> 08022 Barcelona
> T. (+34) 932 380 592
> www.alma3d.com
>
> _____________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Kitware offers ITK Training Courses, for more information visit:
> http://www.kitware.com/products/protraining.html
>
> Please keep messages on-topic and check the ITK FAQ at:
> http://www.itk.org/Wiki/ITK_FAQ
>
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