I'm not too familiar with this filter, but a quick scan of the source leads me to believe that it expects a binary image containing zeroes and ones (see below). <div><br></div><div>Genus is of type PixelType. If it is unsigned char and foreground pixels are 255, the result will be overflow errors during the genus calculation never satisfying the pruning condition.<div>
<br></div><div>Perhaps there should be a set foreground value function then genus can be of type int and the pruning condition can be changed to if(genus/m_ForegroundValue < 2).</div><div><br></div><div><div><div> if (ot.GetCenterPixel())</div>
<div> {</div><div> PixelType genus; </div><div> genus = ot.GetPixel(offset1) + ot.GetPixel(offset2);</div><div> genus += ot.GetPixel(offset3) + ot.GetPixel(offset4);</div><div> genus += ot.GetPixel(offset5) + ot.GetPixel(offset6);</div>
<div> genus += ot.GetPixel(offset7) + ot.GetPixel(offset8);</div><div> if (genus < 2)</div><div> {</div><div> genus = 0;</div><div> ot.SetCenterPixel( genus );</div><div>
}</div><br><div class="gmail_quote">2011/6/7 di xiao <span dir="ltr"><<a href="mailto:xiaodi68@hotmail.com">xiaodi68@hotmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>
Dear all:<br><br>Anyone successfully used the itkBinaryPruningImageFilter? I searched the Insight-users but no solution about it.<br><br>My codes:<br><br> //Pruning the thinning image<br> typedef itk::BinaryPruningImageFilter<ReaderImageType, ReaderImageType> BinaryPruningImageFilterType;<br>
BinaryPruningImageFilterType::Pointer binaryPruningFilter = BinaryPruningImageFilterType::New();<br> binaryPruningFilter->SetInput(binaryThinningFilter->GetOutput());<br> binaryPruningFilter->SetIteration(10);<br>
binaryPruningFilter->Update();<br> binaryPruningFilter->Print(std::cout, 0);<br><br>imageWriter->SetInput(binaryPruningFilter->GetPruning());<br><br>My thinning image is a binary image (background = 0, thinning skeleton = 255).<br>
But I didn't get any changes after put the thinning image through the pruning filter.<br><br>Did I understand wrongly to using the filter?<br><br>Thanks,<br><font color="#888888"><br>Di<br>
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