[ITK-users] itkMeanImageFilter on RGB (how to adjust example MedianFilteringOfAnRGBImage?)

[Bill Lorensen]

You are better off using vector pixels versus rgb pixels. No
overriding necessary. You should be able to modify your example by
looking at this one:

On Fri, Jul 11, 2014 at 11:26 AM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
> You need to define a cast operator. SOmething like:
>   operator TComponent()
>   {
>     return this->GetLuminance();
>   }
>
> But I don't think you will get the result you want.
>
> Bill
>
> On Fri, Jul 11, 2014 at 7:53 AM, Dr. Roman Grothausmann
> <grothausmann.roman at mh-hannover.de> wrote:
>> Dear mailing list members,
>>
>>
>> How would I need to extend/modify the example for
>> MedianFilteringOfAnRGBImage
>>
>> http://itk.org/ITKExamples/src/Filtering/Smoothing/MedianFilteringOfAnRGBImage/Documentation.html
>>
>> to work with itkMeanImageFilter?
>>
>> I modified myRGBPixel like this:
>>
>> namespace itk{
>>   template<typename TComponent>
>>   class myRGBPixel : public RGBPixel<TComponent>{
>>   public:
>>     typedef myRGBPixel     Self;
>>     typedef RGBPixel<TComponent> Superclass;
>>
>>     myRGBPixel():Superclass() {} //avoid candidate expects 1 argument, 0
>> provided
>>     myRGBPixel(int i):Superclass(i) {} //avoid candidate expects 0
>> arguments, 1 provided
>>
>>     using RGBPixel<TComponent>::operator=;
>>
>>     bool operator<=(const Self & r) const{
>>       return (this->GetLuminance() <= r.GetLuminance());
>>     }
>>     bool operator>=(const Self & r) const{
>>       return (this->GetLuminance() >= r.GetLuminance());
>>     }
>>     bool operator<(const Self & r) const{
>>       return (this->GetLuminance() < r.GetLuminance());
>>     }
>>     bool operator>(const Self & r) const{
>>       return (this->GetLuminance() > r.GetLuminance());
>>     }
>>   };
>> }
>>
>>
>> However gcc still yields this error:
>>
>>
>> In file included from
>> /opt/itk-4.5.1/include/ITK-4.5/itkMeanImageFilter.h:115:0,
>>                  from /net/home/ghky/itk/simple/mean-CPU_02.cxx:8:
>> /opt/itk-4.5.1/include/ITK-4.5/itkMeanImageFilter.hxx: In instantiation of
>> ?void itk::MeanImageFilter<TInputImage,
>> TOutputImage>::ThreadedGenerateData(const OutputImageRegionType&,
>> itk::ThreadIdType) [with TInputImage = itk::Image<itk::myRGBPixel<unsigned
>> char>, 3u>; TOutputImage = itk::Image<itk::myRGBPixel<unsigned char>, 3u>;
>> itk::MeanImageFilter<TInputImage, TOutputImage>::OutputImageRegionType =
>> itk::ImageRegion<3u>; itk::ThreadIdType = unsigned int]?:
>> /net/home/ghky/itk/simple/mean-CPU_02.cxx:335:5:   required from here
>> /opt/itk-4.5.1/include/ITK-4.5/itkMeanImageFilter.hxx:81:9: error: invalid
>> static_cast from type
>> ?itk::ConstNeighborhoodIterator<itk::Image<itk::myRGBPixel<unsigned char>,
>> 3u>,
>> itk::ZeroFluxNeumannBoundaryCondition<itk::Image<itk::myRGBPixel<unsigned
>> char>, 3u>, itk::Image<itk::myRGBPixel<unsigned char>, 3u> > >::PixelType
>> {aka itk::myRGBPixel<unsigned char>}? to type
>> ?itk::MeanImageFilter<itk::Image<itk::myRGBPixel<unsigned char>, 3u>,
>> itk::Image<itk::myRGBPixel<unsigned char>, 3u> >::InputRealType {aka
>> double}?
>> make[3]: *** [CMakeFiles/mean-CPU_02.dir/mean-CPU_02.cxx.o] Error 1
>> make[2]: *** [CMakeFiles/mean-CPU_02.dir/all] Error 2
>> make[1]: *** [CMakeFiles/mean-CPU_02.dir/rule] Error 2
>> make: *** [mean-CPU_02] Error 2
>>
>>
>> What am I missing in myRGBPixel?
>>
>> Any help or hints are very much appreciated
>> Roman
>>
>> --
>> Dr. Roman Grothausmann
>>
>> Tomographie und Digitale Bildverarbeitung
>> Tomography and Digital Image Analysis
>>
>> Institut für Funktionelle und Angewandte Anatomie, OE 4120
>> Medizinische Hochschule Hannover
>> Carl-Neuberg-Str. 1
>> D-30625 Hannover
>>
>> Tel. +49 511 532-9574
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>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com



-- 
Unpaid intern in BillsBasement at noware dot com
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