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<DIV> </DIV>
<DIV align=left><SPAN class=368361607-12082010>Hi</SPAN></DIV>
<DIV align=left><SPAN class=368361607-12082010></SPAN> </DIV>
<DIV align=left><SPAN class=368361607-12082010>I want to make a vtk filter which
hast two input images and one output whereby the input images can have different
sizes and the output has the size of the first input. </SPAN></DIV>
<DIV align=left><SPAN class=368361607-12082010></SPAN> </DIV>
<DIV align=left><SPAN class=368361607-12082010>My filter is working but when the
first input is bigger than the second input i get an Update Extent error
(Requested region is (at least partially) outside the largest possible
region).</SPAN></DIV>
<DIV align=left><SPAN class=368361607-12082010></SPAN> </DIV>
<DIV align=left><SPAN class=368361607-12082010>Can anyone say me what i making
wrong:</SPAN></DIV>
<DIV align=left><SPAN class=368361607-12082010></SPAN> </DIV>
<DIV align=left><SPAN class=368361607-12082010>here some code snippets, it would
be also great if anyone can say me how to make a better type handling than the
if(dim ==3), switch(datatype) stuff:</SPAN></DIV>
<DIV align=left><SPAN class=368361607-12082010></SPAN> </DIV>
<DIV align=left><SPAN class=368361607-12082010>
<P>class C<SPAN class=368361607-12082010>Filter</SPAN> : <FONT
color=#0000ff><FONT color=#0000ff>public</FONT></FONT> vtkImageAlgorithm </P>
<P>{</P>
<P><FONT color=#0000ff><FONT color=#0000ff>public</FONT></FONT>:</P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>static</FONT> C<SPAN class=368361607-12082010>Filter</SPAN> *New();</P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>void</FONT> PrintSelf(ostream& oStream, vtkIndent oIndent);</P>
<P><FONT color=#0000ff><FONT color=#0000ff>protected</FONT></FONT>:</P>
<P><SPAN class=368361607-12082010> </SPAN>C<SPAN
class=368361607-12082010>Filter</SPAN> ();</P>
<P><SPAN class=368361607-12082010> </SPAN>~C<SPAN
class=368361607-12082010>Filter</SPAN> (); </P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>int</FONT> RequestData(vtkInformation *poRequest, vtkInformationVector**
ppoInputVector, vtkInformationVector* poOutputVector);</P>
<P><FONT color=#0000ff><FONT color=#0000ff>private</FONT></FONT>:</P>
<P><SPAN class=368361607-12082010> </SPAN>C<SPAN
class=368361607-12082010>Filter</SPAN> (C<SPAN
class=368361607-12082010>Filter</SPAN> &); </P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>void</FONT> <FONT color=#0000ff><FONT
color=#0000ff>operator</FONT></FONT>=(<FONT color=#0000ff><FONT
color=#0000ff>const</FONT></FONT> C<SPAN class=368361607-12082010>Filter</SPAN>
&); </P>
<P>};</P>
<P> </P>
<P>C<SPAN class=368361607-12082010>Filter</SPAN> ::C<SPAN
class=368361607-12082010>Filter</SPAN> ()</P>
<P>{</P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>this</FONT>->SetNumberOfInputPorts(2);</P>
<P>}</P>
<P> </P><FONT color=#0000ff><FONT color=#0000ff>
<P>int</P></FONT></FONT>
<P>C<SPAN class=368361607-12082010>Filter</SPAN> ::RequestData(vtkInformation
*poRequest, vtkInformationVector** ppoInputVector, vtkInformationVector*
poOutputVector)</P>
<P>{</P>
<P><SPAN class=368361607-12082010> </SPAN>vtkInformation*
oInputInfo;</P>
<P><SPAN class=368361607-12082010> </SPAN>oInputInfo =
ppoInputVector[0]->GetInformationObject(0);</P>
<P><SPAN class=368361607-12082010> </SPAN>vtkImageData *oInput1 =
vtkImageData::SafeDownCast(oInputInfo->Get(vtkDataObject::DATA_OBJECT()));</P>
<P><SPAN class=368361607-12082010> </SPAN>oInputInfo =
ppoInputVector[1]->GetInformationObject(0);</P>
<P><SPAN class=368361607-12082010> </SPAN>vtkImageData *oInput2 =
vtkImageData::SafeDownCast(oInputInfo->Get(vtkDataObject::DATA_OBJECT()));</P>
<P><FONT color=#0000ff></FONT>
<P></P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>unsigned</FONT> <FONT color=#0000ff><FONT color=#0000ff>int</FONT></FONT>
iDim;</P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>if</FONT>((oInput1->GetDataDimension() == 3) &&
(oInput2->GetDataDimension() == 3))</P>
<P><SPAN class=368361607-12082010> </SPAN>{</P>
<P><SPAN class=368361607-12082010>
</SPAN>iDim = 3;</P>
<P><SPAN class=368361607-12082010> </SPAN>}</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010> </SPAN>else</FONT> <FONT
color=#0000ff><FONT color=#0000ff>if</FONT></FONT>
((oInput1->GetDataDimension() == 2) &&
(oInput2->GetDataDimension() == 2))</P>
<P><SPAN class=368361607-12082010> </SPAN>{</P>
<P><SPAN class=368361607-12082010>
</SPAN>iDim = 2;</P>
<P><SPAN class=368361607-12082010> </SPAN>}</P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>else</FONT></P>
<P><SPAN class=368361607-12082010> </SPAN>{</P>
<P><SPAN class=368361607-12082010>
</SPAN>std::cout << <FONT color=#a31515><FONT color=#a31515>"Error: This
filter requires two or three dimensional data!"</FONT></FONT> <<
std::endl;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>return</FONT> 0;</P>
<P><SPAN class=368361607-12082010> </SPAN>}</P>
<P><SPAN class=368361607-12082010> </SPAN>vtkInformation* oInfo =
poOutputVector->GetInformationObject(0);</P>
<P><SPAN class=368361607-12082010> </SPAN>vtkImageData *oOutput
= vtkImageData::SafeDownCast(oInfo->Get(vtkDataObject::DATA_OBJECT()));</P>
<P> </P><FONT color=#0000ff><FONT color=#0000ff>
<P><SPAN class=368361607-12082010> </SPAN>int</FONT></FONT>
iScalarType = oInput1->GetScalarType();</P>
<P><SPAN class=368361607-12082010>
</SPAN>vtkSmartPointer<vtkImageCast> oInputCaster1 =
vtkImageCast::New();</P>
<P><SPAN class=368361607-12082010>
</SPAN>oInputCaster1->ReleaseDataFlagOn();</P>
<P><SPAN class=368361607-12082010>
</SPAN>oInputCaster1->SetInput(oInput1);</P>
<P><SPAN class=368361607-12082010>
</SPAN>vtkSmartPointer<vtkImageCast> oInputCaster2 =
vtkImageCast::New();</P>
<P><SPAN class=368361607-12082010>
</SPAN>oInputCaster2->ReleaseDataFlagOn();</P>
<P><SPAN class=368361607-12082010>
</SPAN>oInputCaster2->SetInput(oInput2);</P>
<P><SPAN class=368361607-12082010>
</SPAN>vtkSmartPointer<vtkImageCast> oOutputCaster =
vtkImageCast::New();</P>
<P><SPAN class=368361607-12082010>
</SPAN>oOutputCaster->SetOutputScalarType(iScalarType);</P>
<P><FONT color=#0000ff><SPAN class=368361607-12082010>
</SPAN>if</FONT>(iDim == 2)</P>
<P><SPAN class=368361607-12082010> </SPAN>{</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>switch</FONT>(iScalarType)</P>
<P><SPAN class=368361607-12082010> </SPAN>{</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>case</FONT> VTK_FLOAT:</P>
<P><SPAN
class=368361607-12082010>
</SPAN>{<SPAN class=368361607-12082010> </SPAN></P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> itk::Image<<FONT color=#0000ff><FONT
color=#0000ff>float</FONT></FONT>, 2> TInputImage;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> itk::Image<<FONT color=#0000ff><FONT
color=#0000ff>float</FONT></FONT>, 2> TOutputImage;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> <SPAN
class=368361607-12082010>MyITKFilter</SPAN><TInputImage,TOutputImage>
TFilter;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010> </SPAN>typedef</FONT>
itk::VTKImageToImageFilter<TInputImage> TInputConverter;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> itk::ImageToVTKImageFilter<TOutputImage>
TOutputConverter;</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputCaster1->SetOutputScalarTypeToFloat();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputCaster2->SetOutputScalarTypeToFloat();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>TInputConverter::Pointer oInputConverter1 = TInputConverter::New();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputConverter1->ReleaseDataFlagOn();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputConverter1->SetInput(oInputCaster1->GetOutput());</P>
<P><SPAN
class=368361607-12082010>
</SPAN>TInputConverter::Pointer oInputConverter2 = TInputConverter::New();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputConverter2->ReleaseDataFlagOn();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputConverter2->SetInput(oInputCaster2->GetOutput());</P>
<P><SPAN
class=368361607-12082010>
</SPAN>TFilter::Pointer oFilter = TFilter::New();</P>
<P><SPAN
class=368361607-12082010> </SPAN>oFilter->Set<SPAN
class=368361607-12082010>Input1</SPAN>(oInputConverter1->GetOutput());</P>
<P><SPAN
class=368361607-12082010> </SPAN>oFilter->Set<SPAN
class=368361607-12082010>Input2</SPAN>(oInputConverter2->GetOutput());</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oFilter->ReleaseDataFlagOn();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>TOutputConverter::Pointer oOutputConverter = TOutputConverter::New();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oOutputConverter->ReleaseDataFlagOn();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oOutputConverter->SetInput(oFilter->GetOutput());</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oOutputCaster->SetInput(oOutputConverter->GetOutput()); </P>
<P><SPAN
class=368361607-12082010>
</SPAN>oOutputCaster->Update();</P>
<P><SPAN
class=368361607-12082010> </SPAN>}</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>break</FONT>;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>case</FONT> VTK_UNSIGNED_CHAR:</P>
<P><SPAN
class=368361607-12082010> </SPAN>{</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> itk::Image<<FONT color=#0000ff><FONT
color=#0000ff>unsigned</FONT></FONT> <FONT color=#0000ff><FONT
color=#0000ff>char</FONT></FONT>, 2> TInputImage;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> itk::Image<<FONT color=#0000ff><FONT
color=#0000ff>unsigned</FONT></FONT> <FONT color=#0000ff><FONT
color=#0000ff>char</FONT></FONT>, 2> TOutputImage;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> CCheckerboard<TInputImage,TOutputImage> TFilter;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> itk::VTKImageToImageFilter<TInputImage>
TInputConverter;</P>
<P><FONT color=#0000ff><SPAN
class=368361607-12082010>
</SPAN>typedef</FONT> itk::ImageToVTKImageFilter<TOutputImage>
TOutputConverter;</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputCaster1->SetOutputScalarTypeToUnsignedChar();</P>
<P><SPAN
class=368361607-12082010>
</SPAN>oInputCaster2->SetOutputScalarTypeToUnsignedChar();</P>
<P> </P>
<P><SPAN
class=368361607-12082010>
blablabla</SPAN></P>
<P><SPAN
class=368361607-12082010>
}</SPAN></P>
<P><SPAN class=368361607-12082010>
//do for all cases</SPAN></P>
<P><SPAN class=368361607-12082010> }</SPAN></P>
<P><SPAN class=368361607-12082010>}</SPAN></P>
<P><SPAN class=368361607-12082010>else if (iDim==3)</SPAN></P>
<P><SPAN class=368361607-12082010>{</SPAN></P>
<P><SPAN class=368361607-12082010>//do for dim = 3 and all cases</SPAN></P>
<P><SPAN class=368361607-12082010>}</SPAN></P>
<P>}</P><FONT size=2>
<P>oOutput->ShallowCopy(oOutputCaster->GetOutput());</P>
<P></P>
<P>oOutputCaster->Delete();</P>
<P>oInputCaster1->Delete();</P>
<P>oInputCaster2->Delete();</P>
<P></FONT><FONT color=#0000ff size=2><FONT color=#0000ff
size=2>return</FONT></FONT><FONT size=2> 1;</P></FONT>
<P><SPAN class=368361607-12082010>}</SPAN></P></SPAN></DIV></BODY></HTML>