[Insight-users] Pb with itkExpandImageFilter

[Cyrille Valladeau]

Hi again,

Good new : I solved my problem !
It seems that this filter itkExpandImageFilter works well in the case 
ITK_USE_CENTERED_PIXEL_COORDINATES at ON.
In the case of ITK_USE_CENTERED_PIXEL_COORDINATES = OFF as I mentionned 
it in my previous mail, columns and lines of pixels at EdgePaddingValue 
appears at the left of the image and at its bottom.
The correction I made is in itkImageFunction : in the SetImage method I 
add a +1 in the computation of the EndContinuousIndex :
/typename InputImageType::SizeType size = 
ptr->GetBufferedRegion().GetSize();
m_StartIndex = ptr->GetBufferedRegion().GetIndex();

 for ( unsigned int j = 0; j < ImageDimension; j++ )
  {
    m_EndIndex[j] = m_StartIndex[j] + static_cast<IndexValueType>( 
size[j] ) - 1;
#ifdef ITK_USE_CENTERED_PIXEL_COORDINATES_CONSISTENTLY
    m_StartContinuousIndex[j] = static_cast<CoordRepType>( 
m_StartIndex[j] - 0.5 );
    m_EndContinuousIndex[j]   = static_cast<CoordRepType>( m_EndIndex[j] 
+ 0.5 );
#else
    m_StartContinuousIndex[j] = static_cast<CoordRepType>( 
m_StartIndex[j] );
    m_EndContinuousIndex[j]   = static_cast<CoordRepType>( m_EndIndex[j] 
_*+ 1*_);
#endif/

Regards,
Cyrille


Cyrille Valladeau a écrit :
> Hi all,
>
> I am using the itkExpandImageFilter and I have trouble with it !
> When I use it, the right and the down border contains lines (or 
> columns) at EdgePaddingValue. The length of those lines (or columns) 
> depends on the ExpandFactor s...
> In attachment, the main that shows the probleme and my input image 
> (only pixels at 255).
> If someone has any idea of what I am doing wrong...
>
> Thanks in advance,
> Cyrille
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-- 
<www.c-s.fr> 	*Cyrille VALLADEAU*
Ingénieur d'études et développement - Traitement d'images

*CS Systèmes d'Information - Division Espace & Renseignement*
Département Information Géographique & Image
Parc de la Grande Plaine - 5, Rue Brindejonc des Moulinais - BP 15872
31506 Toulouse Cedex 05 - FRANCE
Tel : +33 561 17 65 72 / Fax : +33 561 34 84 15
Email : cyrille.valladeau at c-s.fr