[Insight-users] Problem printing the ContourExtractor2D

[Preben]

Hi again again,

Okay - I tried to evaluate the number of outputs from the input image 
and the result was zero. That's probably why the "print" doesn't work.

However, I would like to extract some contours of the object, such as e.g.:
http://jobc.dk/contourImage.png
but how can I adjust the algorithm to generate the contours.

The image I try extracting contours from is located here:
http://jobc.dk/can_scene.bmp


Best regards,

Preben Holm


Den 26-03-2010 10:17, Preben skrev:
> Hi again
>
> I've tried to change to parameter as you wrote - it compiles ;-)
>
> However, when I try to use the Print() method, I get an error and the 
> program terminates.
>
> What is wrong
>
>
>
> Best regards,
> Preben
>
>
>
> Den 25-03-2010 15:31, Bill Lorensen skrev:
>> Change    typedef itk::Image<  unsigned char, 3>  ImageType;
>> to
>>      typedef itk::Image<  unsigned char, 2>  ImageType;
>>
>> On Thu, Mar 25, 2010 at 5:48 AM, Preben<64bit at mailme.dk>  wrote:
>>> Hi again
>>>
>>> So far so good! But not that far actually...
>>>
>>> I've written this little example code here:
>>> ----
>>> #include<iostream>
>>> #include<itkImage.h>
>>> #include<itkImageFileReader.h>
>>> #include<itkImageFileWriter.h>
>>> #include<itkContourExtractor2DImageFilter.h>
>>> #include<itkPolyLineParametricPath.h>
>>>
>>> int main() {
>>>     typedef itk::Image<  unsigned char, 3>  ImageType;
>>>     typedef itk::ImageFileReader<  ImageType>    ReaderType;
>>>     typedef itk::ImageFileWriter<  ImageType>    WriterType;
>>>     typedef itk::ContourExtractor2DImageFilter<  ImageType>  
>>> ContourFilter;
>>>
>>>     ReaderType::Pointer reader  = ReaderType::New();
>>>     WriterType::Pointer writer  = WriterType::New();
>>>     reader->SetFileName("can_scene.bmp");
>>>     writer->SetFileName("can_contours.png");
>>>
>>>     ContourFilter::Pointer filter = ContourFilter::New();
>>>     filter->SetInput( reader->GetOutput() );
>>>
>>>     // Run and output data to data object
>>>     ContourFilter::OutputPathType::Pointer path;
>>>     filter->Update();
>>>     path = filter->GetOutput();
>>>
>>>     path->Print(std::cout);
>>> }
>>> ----
>>>
>>>
>>> but I get this strange error when compiling:
>>> ----
>>> C:\working\itkExample>make
>>> [100%] Building CXX object CMakeFiles/itkTest.dir/src/main.cpp.obj
>>> C:/working/InsightToolkit-3.16.0/Code/Common/itkConceptChecking.h: 
>>> In member
>>> function `void itk::Concept::SameDimension<D1,
>>> D2>::Constraints::constraints() [with unsigned int D1 = 3u, unsigned 
>>> int D2
>>> = 2u]':
>>> C:/working/InsightToolkit-3.16.0/Code/Common/itkConceptChecking.h:547:
>>> instantiated from `itk::Concept::SameDimension<3u, 2u>'
>>> C:/working/InsightToolkit-3.16.0/Code/Review/itkContourExtractor2DImageFilter.h:158: 
>>>
>>>    instantiated from 
>>> `itk::ContourExtractor2DImageFilter<main()::ImageType>'
>>> C:\working\itkExample\src\main.cpp:19:   instantiated from here
>>> C:/working/InsightToolkit-3.16.0/Code/Common/itkConceptChecking.h:543:
>>> error: conversion from 
>>> `itk::Concept::Detail::UniqueType_unsigned_int<2u>'
>>> to non-scalar type `itk::Concept::Detail::UniqueType_unsigned_int<3u>'
>>> requested
>>> make[2]: *** [CMakeFiles/itkTest.dir/src/main.cpp.obj] Error 1
>>> make[1]: *** [CMakeFiles/itkTest.dir/all] Error 2
>>> make: *** [all] Error 2
>>> ----
>>>
>>> What should I do about it?
>>>
>>> (I'm using Windows XP 32bit with MinGW compiler and configures ITK with
>>> REVIEW code set to ON)
>>>
>>>
>>> Best regards,
>>>
>>> Preben Holm
>>>
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