[ITK] How to get to get image similarity metrics under .NET ?

[Yaniv, Ziv Rafael (NIH/NLM/LHC) [C]]

Hello Oleg,

The ImageRegistrationMethod only supports images with pixel type
sitkFloat32 and sitkFloat64. You can either specify the pixel type when
reading the image 
(http://www.itk.org/SimpleITKDoxygen/html/namespaceitk_1_1simple.html#a02ff
c30c3c55dd9eeff3f76ba19f35e7) or read the image with its native pixel type
and then 
use the SimpleITK Cast function
(http://www.itk.org/SimpleITKDoxygen/html/namespaceitk_1_1simple.html#af8c9
d7cc96a299a05890e9c3db911885), casting it to either of these two types.

   Ziv



On 11/18/15, 9:51 AM, "Oleg Subachev" <osubachev at gmail.com> wrote:

>Thanks, Brad.
>
>But when I try this code:
>using ( ImageRegistrationMethod method = new ImageRegistrationMethod() )
>{
>method.SetMetricAsMattesMutualInformation( 50 );
>double metric = method.MetricEvaluate( SimpleITK.ReadImage( "1.png" ),
>SimpleITK.ReadImage( "2.png" ) );
>}
>
>I get the exception:
>{"Exception thrown in SimpleITK
>ImageRegistrationMethod_MetricEvaluate:
>..\\..\\..\\..\\..\\SimpleITK\\Code\\Registration\\src\\sitkImageRegistrat
>ionMethod.cxx:862:\nsitk::ERROR:
>Filter does not support fixed image type: vector of 8-bit unsigned
>integer"}
>
>What's wrong ?
>What is the simplest way to get similarity value of two image files ?
>
>-- 
>Best regards,
>Oleg Subachev
>
>On Tue, Nov 17, 2015 at 6:41 PM, Bradley Lowekamp
><blowekamp at mail.nih.gov> wrote:
>> Hello,
>>
>> You should look into SimpleITK's
>>ImageRegistrationMethod::MetricEvaluate( Image, Image ) member function.
>>
>> Here is a Python example of using the method, C# should be similar:
>>
>> 
>>http://insightsoftwareconsortium.github.io/SimpleITK-Notebooks/63_Registr
>>ation_Initialization.html
>>
>> HTH,
>> Brad
>>
>> On Nov 17, 2015, at 8:24 AM, Oleg Subachev <osubachev at gmail.com> wrote:
>>
>>> I need to get similarity metrics for 2D images under .NET.
>>> According to ITK documentation
>>> (http://www.itk.org/Doxygen/html/ImageSimilarityMetricsPage.html)
>>> there are several Image To Image metrics available.
>>> ITK itself contains corresponding methods.
>>> But I cannot find those methods in SimpleITK :-(
>>> There is SimpleITK.NormalizedCorrelation(Image, Image, Image) method,
>>> but it seems to have nothing with similarity metrics.
>>>
>>> How to get to get image similarity metrics under .NET ?
>>>
>>> --
>>> Best regards,
>>>
>>> Oleg Subachev
>>> _______________________________________________
>>> Community mailing list
>>> Community at itk.org
>>> http://public.kitware.com/mailman/listinfo/community
>>
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