[ITK-users] WarpImageFilter wrong output

[Matt McCormick]

Hi Haratron,

The referenced example is initializing a rigid transform based on
landmarks while the other examples are creating a non-rigid
displacement field based on landmarks.

HTH,
Matt

On Wed, Jan 7, 2015 at 3:10 PM, haratron <haratron at gmail.com> wrote:
> Hi Matt,
>
> thanks for the response.
> What about
> http://www.itk.org/Wiki/ITK/Examples/Registration/LandmarkBasedTransformInitializer
> ?
> I missed a space in the previous email and it didn't parse the URL
> correctly.
>
> On Wed, Jan 7, 2015 at 9:58 PM, Matt McCormick <matt.mccormick at kitware.com>
> wrote:
>>
>> Hi John,
>>
>> The DisplacementFieldTransform can be used with the
>> ResampleImageFilter like any other Transform. There was a time when
>> the DisplacementFieldTransform was not available -- the special
>> WarpImageFilter class was used in this case.
>>
>> HTH,
>> Matt
>>
>> On Fri, Jan 2, 2015 at 10:57 PM, haratron <haratron at gmail.com> wrote:
>> > Thanks!
>> >
>> > What is the difference between:
>> > 1. http://www.itk.org/Wiki/ITK/Examples/Registration/WarpImageFilter
>> > 2.
>> >
>> > http://www.itk.org/Wiki/ITK/Examples/Registration/LandmarkBasedTransformInitializer3.
>> >
>> > http://www.itk.org/Wiki/ITK/Examples/Registration/DeformationFieldTransform
>> >
>> > On Fri, Jan 2, 2015 at 8:28 PM, Bradley Lowekamp
>> > <blowekamp at mail.nih.gov>
>> > wrote:
>> >>
>> >> Hello,
>> >>
>> >> In your CreateMovingImage2 method how is the "image" argument connected
>> >> to
>> >> the pipeline?
>> >>
>> >> Brad
>> >>
>> >> On Jan 2, 2015, at 12:59 PM, haratron <haratron at gmail.com> wrote:
>> >>
>> >> Hello and happy new year,
>> >>
>> >> I'm using the WarpImageFilter from here:
>> >> http://www.itk.org/Wiki/ITK/Examples/Registration/WarpImageFilter
>> >>
>> >> I have original.png that I'm using as the movingImage and I'm creating
>> >> another one ("empty" image filled with white color, size 1800x1800)
>> >> that is
>> >> the fixedImage.
>> >>
>> >> The problem is that a blank image filled with black is created instead
>> >> of
>> >> the warped image that is expected.
>> >>
>> >> original.png : http://i.imgur.com/QQyXgzg.png
>> >> output.png: http://i.imgur.com/LkYnZ6n.png
>> >>
>> >> My full WarpImageFilter.cxx file (includes changes from the original
>> >> example code):
>> >> http://pastebin.com/WNDb2TgM
>> >>
>> >> What am I doing wrong?
>> >>
>> >> John
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