[Insight-users] Problem while disconnecting pipeline

[Martijn Steenwijk]

Dear Robert,

 

Thanks for your help. This was - off course - also how I thought it should
be, but it didn't work out. However, looking further, I just discovered that
my input file has become disrupted. It contains the output of the series of
filters, which gave rise to the wrong output :o).

 

Anyway, I restored the original input image and all works fine. Thanks for
thinking with me!

 

Best,
Martijn

 

Van: robert tamburo [mailto:robert.tamburo at gmail.com] 
Verzonden: woensdag 7 september 2011 21:44
Aan: martijnsteenwijk at gmail.com
CC: insight-users at itk.org
Onderwerp: Re: [Insight-users] Problem while disconnecting pipeline

 

Sorry, I misread your email. I'm assuming that by 'input image' you mean the
output of the reader. To reuse it, set an image to the reader output then
disconnect the image from the pipeline, i.e.  inputImage =
reader->GetOutput(); inputImage->DisconnectPipeline();  That _should_ allow
you to use inputImage in filters and write it to disc with the writer. 

 

On Wed, Sep 7, 2011 at 1:56 PM, robert tamburo <robert.tamburo at gmail.com>
wrote:

Are you calling update on the filter before setting the image to the filter
output?

 

On Wed, Sep 7, 2011 at 1:25 PM, Martijn Steenwijk
<martijnsteenwijk at gmail.com> wrote:

Dear all,

 

I would like to use an input image two times, so I have to Disconnect the
pipeline. My pipeline is like this.

 

ReaderType::Pointer reader = ReaderType::New();

reader->SetFileName(myFile);

reader->Update();

 

// Create a binary mask of the input image

typedef itk::BinaryThresholdImageFilter<ImageType,BinaryImageType>
BinaryThresholdImageFilterType;

BinaryThresholdImageFilterType::Pointer thresholdFilter =
BinaryThresholdImageFilterType::New();

thresholdFilter->SetInput(reader->GetOutput());

thresholdFilter->SetUpperThreshold(0.0000);

thresholdFilter->SetInsideValue(0);

thresholdFilter->SetOutsideValue(255);

////

//  some other filters

////

ImageType::Pointer filteredImage = myFilterN->GetOutput();

filteredImage->DisconnectPipeline();

 

typedef itk::ImageFileWriter<ImageType>                 ImageWriterType;

ImageWriterType::Pointer writer = ImageWriterType::New();

writer->SetFileName(myOutFile);

writer->SetInput(reader->GetOutput());             // for debug purposes,
just write the reader->Output();

writer->Update();

 

Unfortunately the written image does not contain the input image, but the
output of myFilterN (filteredImage), which means, something gets wrong with
disconnecting the pipeline. How can I fix this?

 

Best,

Martijn


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