CWaveletTransform Class Reference

PGF wavelet transform. More...

#include <WaveletTransform.h>

Public Member Functions
	CWaveletTransform (UINT32 width, UINT32 height, int levels, DataT *data=NULL)
	~CWaveletTransform ()
	Destructor.
OSError	ForwardTransform (int level, int quant)
OSError	InverseTransform (int level, UINT32 *width, UINT32 *height, DataT **data)
CSubband *	GetSubband (int level, Orientation orientation)
void	SetROI (const PGFRect &rect)
const PGFRect &	GetTileIndices (int level) const
UINT32	GetNofTiles (int level) const
const PGFRect &	GetROI (int level) const

Friends
class	CSubband

Detailed Description

PGF wavelet transform.

PGF wavelet transform class.

Author

C. Stamm, R. Spuler

Constructor & Destructor Documentation

CWaveletTransform::CWaveletTransform	(	UINT32	width,
		UINT32	height,
		int	levels,
		DataT *	data = NULL
	)

Constructor: Constructs a wavelet transform pyramid of given size and levels.

Parameters

width	The width of the original image (at level 0) in pixels
height	The height of the original image (at level 0) in pixels
levels	The number of levels (>= 0)
data	Input data of subband LL at level 0

Member Function Documentation

OSError CWaveletTransform::ForwardTransform	(	int	level,
		int	quant
	)

Compute fast forward wavelet transform of LL subband at given level and stores result on all 4 subbands of level + 1.

Parameters

level	A wavelet transform pyramid level (>= 0 && < Levels())
quant	A quantization value (linear scalar quantization)

Returns

error in case of a memory allocation problem

UINT32 CWaveletTransform::GetNofTiles ( int  level ) const

inline

Get number of tiles in x- or y-direction at given level.

Parameters

level

A valid subband level.

const PGFRect& CWaveletTransform::GetROI ( int  level ) const

inline

Return ROI at given level.

Parameters

level

A valid subband level.

CSubband* CWaveletTransform::GetSubband ( int  level, Orientation  orientation  )

inline

Get pointer to one of the 4 subband at a given level.

Parameters

level	A wavelet transform pyramid level (>= 0 && <= Levels())
orientation	A quarter of the subband (LL, LH, HL, HH)

const PGFRect& CWaveletTransform::GetTileIndices ( int  level ) const

inline

Get tile indices of a ROI at given level.

Parameters

level

A valid subband level.

OSError CWaveletTransform::InverseTransform	(	int	level,
		UINT32 *	width,
		UINT32 *	height,
		DataT **	data
	)

Compute fast inverse wavelet transform of all 4 subbands of given level and stores result in LL subband of level - 1.

Parameters

level	A wavelet transform pyramid level (> 0 && <= Levels())
width	A pointer to the returned width of subband LL (in pixels)
height	A pointer to the returned height of subband LL (in pixels)
data	A pointer to the returned array of image data

Returns

error in case of a memory allocation problem

void CWaveletTransform::SetROI

(

const PGFRect &

rect

)

Compute and store ROIs for each level

Parameters

rect	rectangular region of interest (ROI)

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

• /Users/ale/src/Scribus/scribus/third_party/pgf/WaveletTransform.h
• /Users/ale/src/Scribus/scribus/third_party/pgf/WaveletTransform.cpp