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HxExportExtraIdentMaskStdev Class Template Reference

Functor for computation of the standard deviation of all values in an image identified by a mask. More...

#include <HxExportExtraIdentMaskStdev.h>

List of all members.

Public Types

typedef HxTagTransInVar TransVarianceCategory
 Functor is translation invariant. More...

typedef HxTag1Phase PhaseCategory
 1 phase. More...


Public Methods

 HxExportExtraIdentMaskStdev (HxTagList &tags)
 Constructor. More...

 ~HxExportExtraIdentMaskStdev ()
 Destructor. More...

void doIt (const ImValT &imV, const ExtraValT &extraV)
 Processing one pixel. More...


Static Public Methods

HxString className ()
 The name : "identMaskStdev". More...

Detailed Description

template<class ResultT, class ImValT, class ExtraValT>
class HxExportExtraIdentMaskStdev< ResultT, ImValT, ExtraValT >

Functor for computation of the standard deviation of all values in an image identified by a mask.

Member Typedef Documentation

template<class ResultT, class ImValT, class ExtraValT>
typedef HxTagTransInVar HxExportExtraIdentMaskStdev::TransVarianceCategory
 

Functor is translation invariant.

template<class ResultT, class ImValT, class ExtraValT>
typedef HxTag1Phase HxExportExtraIdentMaskStdev::PhaseCategory
 

1 phase.

Constructor & Destructor Documentation

template<class ResultT, class ImValT, class ExtraValT>
HxExportExtraIdentMaskStdev< ResultT, ImValT, ExtraValT >::HxExportExtraIdentMaskStdev (  HxTagList &    tags ) 
 

Constructor. 

00057                                              : _tags(tags)
00058 {
00059     _maskVal = HxGetTag<int>(tags, "maskVal");
00060     _exportVariance = HxGetTag(tags, "exportVariance",false);
00061     _sum = HxScalarInt(0);
00062     _sumSqr = HxScalarInt(0);
00063     _num = 0;
00064 }

template<class ResultT, class ImValT, class ExtraValT>
HxExportExtraIdentMaskStdev< ResultT, ImValT, ExtraValT >::~HxExportExtraIdentMaskStdev (    ) 
 

Destructor. 

00068 {
00069     ResultT num = _num;
00070     ResultT num1 = _num - 1;
00071     ResultT result = (_num == 1) ? ResultT(HxScalarInt(0))
00072                                  : (_sumSqr - ((_sum * _sum) / num)) / (num1);
00073     if(!_exportVariance)
00074         result = result.sqrt();
00075     HxAddTag(_tags, "result", HxValue(result));
00076 }

Member Function Documentation

template<class ResultT, class ImValT, class ExtraValT>
void HxExportExtraIdentMaskStdev< ResultT, ImValT, ExtraValT >::doIt (  const ImValT &    imV,
const ExtraValT &    extraV
)  [inline]
 

Processing one pixel. 

00082 {
00083     if (extraV == _maskVal) {
00084         _sum += imV;
00085         _sumSqr += imV * imV;
00086         _num += 1;
00087     }
00088 }

template<class ResultT, class ImValT, class ExtraValT>
HxString HxExportExtraIdentMaskStdev< ResultT, ImValT, ExtraValT >::className (    )  [inline, static]
 

The name : "identMaskStdev". 

00093 {
00094     return HxString("identMaskStdev");
00095 }

The documentation for this class was generated from the following file:
Generated on Tue Feb 3 14:18:55 2004 for C++Reference by doxygen1.2.12 written by Dimitri van Heesch, © 1997-2001