<div dir="ltr"><div><div>Thanks for your quick reply, really appreciate.<br><br>I could well be using itk::ScaleTransform but I use simply resampling over hand written spacing. I think my problem is in fact in pipelining:<br>
<br>void ResampleImageFilterEx<TInputImage,TOutputImage>::GenerateData()<br>{<br> //....<br> typename TInputImage::RegionType roi = this->GetOutput()->GetRequestedRegion();<br> typename TInputImage::SpacingType spacing = this->GetInput()->GetSpacing();<br>
typename TInputImage::SizeType size = roi.GetSize();<br><br> for ( unsigned int i = 0; i < TInputImage::ImageDimension; ++i)<br> {<br> spacing[i] /= m_Decimation;<br> size[i] = (unsigned int)( (double)size[i] * m_Decimation );<br>
}<br> itk::ResampleImageFilter<TInputImage,TOutputImage>::Pointer resampler = <br> itk::ResampleImageFilter<TInputImage,TOutputImage>::New();<br><br> resampler->SetOutputSpacing( inputSpacing );<br>
resampler->SetSize( inputSize );<br> resampler->SetInput( this->GetInput() );<br><br> resampler->GraftOutput( this->GetOutput() );<br> resampler->Update();<br> resampler->GraftOutput( pyrup->GetOutput() );<br>
}<br><br>but if m_Decimation (or scale parameter) is given as parameter and input yet unknown, I can't get regions propagating correctly. Because eventually I want to call Update only for the tail filter.<br></div><div>
<br></div>Best,<br></div>-Vaaksiainen<br><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/10/16 Mike Chinander <span dir="ltr"><<a href="mailto:chinander@gmail.com" target="_blank">chinander@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Check out the following example: <a href="http://www.itk.org/Wiki/ITK/Examples/ImageProcessing/ScaleTransform" target="_blank">http://www.itk.org/Wiki/ITK/Examples/ImageProcessing/ScaleTransform</a></div>
<div class="gmail_extra">
<br><br><div class="gmail_quote"><div><div class="h5">On Wed, Oct 16, 2013 at 9:10 AM, Vaaksiainen <span dir="ltr"><<a href="mailto:vaaksiainen@gmail.com" target="_blank">vaaksiainen@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5">
<div dir="ltr">Hi folks,<br><br>itk::ResampleImageFilter requires size being set before Update() so far that I've understood it.<br><br>That being said, I'd wish to implement resize image filter (derivative for before mentioned) which samples the image based on scaling parameter relative to its input size e.g.<br>
<br>newWidth = scaling * oldWidth<br><br>which I figure out at GenerateData() and yet, I'd wish to be able to put this filter in the pipeline not knowing the size of the input image, e.g.<br><br>Reader -> Filter#1 -> ResampleImageFilterEx -> Filter#2 -> Writer<br>
<br>How PropagateRequestedRegion() works and how its implemented in itk::ResampleImageFilter I'm not sure if I can do this at all.<br><br>Please, any advice?<br><br>Best,<br>-Vaaksiainen<br><br><br><br><br></div>
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