[Insight-developers] Addressing Failures of ResampleImageFilter9Test

[Tom Vercauteren]

Hi Bill,

Thanks for investigating this. VNL_CONFIG_ENABLE_SSE2_ROUNDING is
meant to have no effect (except speed) on the results. If it has, it's
a bug.

I'll try and get some time to look into this issue.

Tom

On Mon, Aug 17, 2009 at 19:51, Bill Lorensen<bill.lorensen at gmail.com> wrote:
> Luis,
>
> I believe I found the partition. I checked most (not all)
> CMakeLists.txt files (in the itkSystemInformationTest output) for
> passing and failing platforms.
>
> Here is what I concluded:
>
> Platforms that are failing have a common cmake variable set:
> //Enable Streaming SIMD Extensions 2 implementation of rounding
> // (hardware dependant).
> VNL_CONFIG_ENABLE_SSE2_ROUNDING:BOOL=ON
>
> those that are passing have one of two conditions:
>
> 1) ITK_USE_CENTERED_PIXEL_COORDINATES_CONSISTENTLY:BOOL=OFF
> or
> 2) VNL_CONFIG_ENABLE_SSE2_ROUNDING:BOOL=OFF
>
> Should we expect the same results regardless of the SSE2 setting? If
> not, then we can check in another baseline. If the results should be
> the same, we have some work to do.
>
> Bill
>
>
> On Sun, Aug 16, 2009 at 12:30 PM, Luis Ibanez<luis.ibanez at kitware.com> wrote:
>>
>> FYI:
>>
>> The test  "ResampleImageFilter9Test":
>>
>> Has been failing since we enabled the flag
>>
>> ITK_USE_CENTERED_PIXEL_COORDINATES_CONSISTENTLY
>>
>> What seems to be special about this test is that it runs
>> on an image of RGBPixels, and therefore, it uses:
>>
>> itk::VectorResampleImageFilter  and
>> itk::VectorNearestNeighborInterpolateImageFunction
>>
>> What is curious, is that is passes on some machines and fails
>> on others, and it doesn't seem to be a clear partition between
>> the two groups, (see this link):
>> http://www.cdash.org/CDash/testSummary.php?project=2&name=ResampleImageFilter9Test&date=2009-08-16
>>
>>
>> We will be following on this during the week....
>>
>>
>> Any suggestions/hints are welcome...
>>
>>
>>      Thanks
>>
>>
>>          Luis
>>
>>
>>
>>
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