[Insight-users] get largest labeled region

[LaMoOsH ..]

Hi everyone, i have two regions in my image .. 
it is a binary image .. 
i used label map to label these object .. 
how can i say that i want to pick the largest region among these two regions ?
i want to pic the largest to apply a some filters on it .. 
 
 
This is my code and dont know how to finish it  
 
typedef unsigned long LabelType; 
typedef itk::ShapeLabelObject< LabelType, 2 > LabelObjectType;
typedef itk::LabelMap< LabelObjectType > LabelMapType;
typedef itk::BinaryImageToShapeLabelMapFilter< OutputImageType, LabelMapType > ConverterType;
ConverterType::Pointer converter = ConverterType::New(); 
converter->SetInputForegroundValue( 255 );
LabelMapType::Pointer labelMap = converter->GetOutput();
for( unsigned int label=1; label<=labelMap->GetNumberOfLabelObjects(); label++ ) 
{
const LabelObjectType * labelObject = labelMap->GetLabelObject( label ); 
 
 
Thanks  		 	   		  
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