DcmQuantScaleTable Class Reference

this is a helper class used for temporarily reducing the image bit depth during calculation of an image histogram. More...

List of all members.

Public Member Functions

 DcmQuantScaleTable ()
 constructor
 ~DcmQuantScaleTable ()
 destructor
DcmQuantComponent operator[] (unsigned int idx) const
 array look-up operation.
void createTable (unsigned long oldmaxval, unsigned long newmaxval)
 initializes the look-up table.

Private Member Functions

void cleanup ()
 resets the object to the default-constructed state
 DcmQuantScaleTable (const DcmQuantScaleTable &src)
 private undefined copy constructor
DcmQuantScaleTable & operator= (const DcmQuantScaleTable &src)
 private undefined copy assignment operator

Private Attributes

DcmQuantComponent * table
 array of pixel values
unsigned int numEntries
 number of entries in array

Detailed Description

this is a helper class used for temporarily reducing the image bit depth during calculation of an image histogram.

An object of this class contains a look-up table that maps image pixel values to scaled-down image pixel values.

Definition at line 52 of file diqtstab.h.

Member Function Documentation

void DcmQuantScaleTable::createTable (  unsigned long  oldmaxval,
unsigned long  newmaxval
)  [inline]
 

initializes the look-up table.

Parameters:
oldmaxval maximum possible pixel value in source image
newmaxval new desired maximum value, should be < oldmaxval

Definition at line 87 of file diqtstab.h.

References cleanup(), numEntries, and table.

Referenced by DcmQuantColorMapping< T1, T2 >::create().

DcmQuantComponent DcmQuantScaleTable::operator[] (  unsigned int  idx  )  const [inline]
 

array look-up operation.

Parameters:
idx pixel value to look up. Object must be initialized (i.e. createTable() must have been called before) and idx must be less or equal to the parameter oldmaxval passed to createTable().
Returns:
scaled-down value from look-up table.

Definition at line 75 of file diqtstab.h.

References numEntries, and table.

The documentation for this class was generated from the following file:

Generated on 20 Dec 2005 for OFFIS DCMTK Version 3.5.4 by Doxygen 1.4.5