DWT Class Reference

DWT class. More...

#include <dwt.hpp>

Static Public Member Functions
static __forceinline void	set_zlib_compr_flag (int flag_val)
	Set Zlib compression flag.
static void	dwt_fwdlift_53_2D (float *array, int pitch)
	Do forward transform.
static void	dwt_fwdlift_53_2D (float *array, int pitch, int transform_levels)
	Do forward transform.
static __forceinline void	dwt_invlift_53_2D (float *array, int pitch, int transform_levels)
	Do inverse transform.
static void	ezw_scanorder_indices (void)
	Initialize a datastructure for the EZW tree.
static void	print_array (float *array)
	Debug function.
static void	ezw_encode (float *work_array, int w, int h, int passes, uchar_t *ext_compr_data_dom, uchar_t *ext_compr_data_sub)
	EZW encoding.
static __forceinline void	ezw_decode (float *work_array, int w, int h, int passes, uchar_t *ext_compr_data_dom, uchar_t *ext_compr_data_sub)
	EZW decoding.

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Detailed Description

DWT class.

Handles the discrete wavelet transform and the EZW compression (Shapiro).

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Member Function Documentation

static void DWT::dwt_fwdlift_53_2D	(	float *	array,
		int	pitch,
		int	transform_levels
	)			[inline, static]

Do forward transform.

Do a 2D forward discrete wavelet transform by doing two 1D forward dwts on the colums and the rows of the 2D input-data. Note: array must be nxn, where n is "power of 2"

Parameters:

	array	Source-data and destination for final transform.
	pitch	Bytes per "line".
	transform_levels	Determines, "how many passes" to perform on the input-data.

static void DWT::dwt_fwdlift_53_2D	(	float *	array,
		int	pitch
	)			[inline, static]

Do forward transform.

Do a 2D forward discrete wavelet transform by doing two 1D forward dwts on the colums and the rows of the 2D input-data. Note: array must be nxn, where n is "power of 2"

Parameters:

	array	Source-data and destination for final transform.
	pitch	Bytes per "line".

static __forceinline void DWT::dwt_invlift_53_2D	(	float *	array,
		int	pitch,
		int	transform_levels
	)			[inline, static]

Do inverse transform.

Do a 2D inverse discrete wavelet transform by doing two 1D inverse dwts on the colums and the rows of the 2D input-data. Note: array must be nxn, where n is "power of 2"

Parameters:

	array	Source-data and destination for final transform.
	pitch	Bytes per "line".
	transform_levels	Determines, "how many passes" to perform on the input-data.

static __forceinline void DWT::ezw_decode	(	float *	work_array,
		int	w,
		int	h,
		int	passes,
		uchar_t *	ext_compr_data_dom,
		uchar_t *	ext_compr_data_sub
	)			[inline, static]

EZW decoding.

Parameters:

	work_array	The input array.
	w	The array's width.
	h	The array's height.
	passes	How many EZW passes to use.
	ext_compr_data_dom	The source of the symbols of the dominant pass.
	ext_compr_data_sub	The source of the symbols of the subordinate pass.

static void DWT::ezw_encode	(	float *	work_array,
		int	w,
		int	h,
		int	passes,
		uchar_t *	ext_compr_data_dom,
		uchar_t *	ext_compr_data_sub
	)			[inline, static]

EZW encoding.

Parameters:

	work_array	The input array.
	w	The array's width.
	h	The array's height.
	passes	How many EZW passes to use.
	ext_compr_data_dom	The destination for the symbols of the dominant pass.
	ext_compr_data_sub	The destination for the symbols of the subordinate pass.

static void DWT::ezw_scanorder_indices

(

void

)

[inline, static]

Initialize a datastructure for the EZW tree.

This datastructure allows the traversal of the quadtree-like EZW tree.

static void DWT::print_array

(

float *

array

)

[inline, static]

Debug function.

Prints the array (can be called either before or after the wavelet transform).

Parameters:

array

The array to print.

static __forceinline void DWT::set_zlib_compr_flag

(

int

flag_val

)

[inline, static]

Set Zlib compression flag.

This flag indicates, if the symbols from next transform are to be Zlib-compressed or not.

Parameters:

flag_val

The flag value (0 for no compression).

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

• dwt.hpp

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