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

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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 48 of file diqtstab.h.

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Member Function Documentation

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 71 of file diqtstab.h.

References numEntries, and table.

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 83 of file diqtstab.h.

References cleanup(), numEntries, and table.

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

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

• dcmimage/include/dcmtk/dcmimage/diqtstab.h

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Generated on 6 Jan 2011 for OFFIS DCMTK Version 3.6.0 by Doxygen 1.5.1