[Insight-users] Trouble with getting the output ofFastMarchingImageFilter

[秦安]

hi,Iván Macía:
        at last i found  the output time crossing map from fastmarchingfliter is infinite at places the growing never reach.  Your code and my code both work well. when i debug the code yesterday, i found the first hundreds of pixel to be infinite, and i thought no data was outputted. sorry for my confusion and thank Iván Macía for you kindly help. Regards! 
     

======= 2005-12-05 22:39:14 =======

>Hi,
>
>Possibly the problem is that you are creating a new image when you don't
>need to and possibly the regions are not correctly set. Try if this works :
>
>ConstIteratorType constIterator3( fastMarching->GetOutput(),
>fastMarching->GetOutput()->GetRequestedRegion() );
>
>float timedata[imageWidth*imageHeight];
>InternalImageType::PixelType pixel;
>int i;
>for(constIterator3.GoToBegin(),i=0;!constIterator3.IsAtEnd();
>++constIterator3,i++)
>{
>  pixel = constIterator3.Get();
>  timedata[i] = (float)pixel; 
>}
>
>
>Another approach for copying the output using itk images is the following :
>
>InternalImageType::Pointer image = ImageType::New();      
> 
>image->SetRegions( fastMarching->GetOutput()->GetRequestedRegion());
>image->Allocate();
>
>ConstIteratorType inputIt( reader->GetOutput(),
>fastMarching->GetOutput()->GetRequestedRegion() );
>IteratorType     outputIt( image ,
>fastMarching->GetOutput()->GetRequestedRegion() );
>
>for ( inputIt.GoToBegin(), outputIt.GoToBegin(); !inputIt.IsAtEnd();
>++inputIt, ++outputIt )
>{
>  outputIt.Set( inputIt.Get() );
>}
>
>
>Hope that helps
>
>Iván
>
>
>-----Mensaje original-----
>De: insight-users-bounces+imacia=vicomtech.es at itk.org
>[mailto:insight-users-bounces+imacia=vicomtech.es at itk.org] En nombre de ÇØ°²
>Enviado el: lunes, 05 de diciembre de 2005 8:48
>Para: ibanez luis
>CC: insight-users
>Asunto: [Insight-users] Trouble with getting the output
>ofFastMarchingImageFilter
>
>
>hi,luis and  itk users:
>
>    when working with the FastMarchingImageFilter, i try to get the output
>time crossing image. i write the simple codes as below "
>    InternalImageType::Pointer internalImage3 = InternalImageType::New();
>	internalImage3 = fastMarching->GetOutput();
>	ConstIteratorType
>constIterator3(internalImage3,internalImage3->GetRequestedRegion());
>
>	float timedata[imageWidth*imageHeight];
>    InternalImageType::PixelType pixel;
>    int i;
>	for(constIterator3.GoToBegin(),i=0;!constIterator3.IsAtEnd();
>++constIterator3,i++)
>	{
>		pixel = constIterator3.Get();
>		timedata[i] = (float)pixel; 
>	}
>"
>     The whole image processing pipeline has been update successfully
>before, and the output binary images suggest the filters work well. but when
>come to these codes, the pixel variable simply get noting.  
>     Any help will be appreciated.     Thank you for your help and best
>regards!
> 
>
>
>
>
>	
>
>
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> 
>    
>
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