[Insight-users] MEAN and VARIANCE

[Kevin H. Hobbs]

On 03/16/2010 05:57 AM, edoardo.belletti at alice.it wrote:
>
> Hi Insight users
>
> How can I calculate the mean and the variance of a region of my image
> with ITK?
>
> Thank you very much in advance
> Edoardo
>
>   

typedef itk::ExtractImageFilter< ImageType, ImageType > ExtractorType;
ExtractorType::Pointer extractor = ExtractorType::New();
extractor->SetExtractionRegion( region );
extractor->SetInput( image );

typedef itk::StatisticsImageFilter< ImageType > StatType;
StatType::Pointer stats = StatType::New();
stats->SetInput( extractor->GetOutput() );
stats->Update();
double mean = stats->GetMean();
double varience = stats->GetVariance();


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