ENH: added stat computation step

Modules/Applications/AppHyperspectral/app/otbEndmemberNumberEstimation.cxx

@@ -21,6 +21,8 @@
 #include "otbWrapperApplication.h"
 #include "otbWrapperApplicationFactory.h"
 
+#include "otbStreamingStatisticsVectorImageFilter.h"
+
 namespace otb
 {
 namespace Wrapper
@@ -40,6 +42,9 @@ public:
 
   itkTypeMacro(EndmemberNumberEstimation, otb::Application);
 
+  typedef otb::StreamingStatisticsVectorImageFilter<FloatVectorImageType, float> 
+    StreamingStatisticsVectorImageFilterType;
+
 private:
   void DoInit() override
   {
@@ -83,7 +88,10 @@ private:
 
   void DoExecute() override
   {
+    auto statisticsFilter = StreamingStatisticsVectorImageFilterType::New();
+    statisticsFilter->SetInput(GetParameterImage("in"));
 
+    statisticsFilter->Update();
   }
 
 };