ucar.jpeg.jj2000.j2k.wavelet
Class WTDecompSpec

java.lang.Object
  ucar.jpeg.jj2000.j2k.wavelet.WTDecompSpec

public class WTDecompSpec
extends Object

This class holds the decomposition type to be used in each part of the image; the default one, the component specific ones, the tile default ones and the component-tile specific ones.

The decomposition type identifiers values are the same as in the codestream.

The hierarchy is:
- Tile and component specific decomposition
- Tile specific default decomposition
- Component main default decomposition
- Main default decomposition

At the moment tiles are not supported by this class.

Field Summary

static byte	DEC_SPEC_COMP_DEF The identifier for "component default" specified decomposition
static byte	DEC_SPEC_MAIN_DEF The identifier for "main default" specified decomposition
static byte	DEC_SPEC_TILE_COMP The identifier for "tile and component specific" specified decomposition
static byte	DEC_SPEC_TILE_DEF The identifier for "tile specific default" specified decomposition
static int	WT_DECOMP_DYADIC ID for the dyadic wavelet tree decomposition (also called "Mallat" in JPEG 2000): 0x00.
static int	WT_DECOMP_PACKET ID for the PACKET (as defined in JPEG 2000) wavelet tree decomposition (2 levels of decomposition in the high bands and some specified number for the lowest LL band): 0x01.
static int	WT_DECOMP_SPACL ID for the SPACL (as defined in JPEG 2000) wavelet tree decomposition (1 level of decomposition in the high bands and some specified number for the lowest LL band): 0x02.

Constructor Summary

WTDecompSpec(int nc, int dec, int lev)
Constructs a new 'WTDecompSpec' for the specified number of components and tiles, with the given main default decomposition type and number of levels.

Method Summary

int	getDecompType(int n) Returns the decomposition type to be used in component 'n' and tile 't'.
byte	getDecSpecType(int n) Returns the type of specification for the decomposition in the specified component and tile.
int	getLevels(int n) Returns the decomposition number of levels in component 'n' and tile 't'.
int	getMainDefDecompType() Returns the main default decomposition type.
int	getMainDefLevels() Returns the main default decomposition number of levels.
void	setMainCompDefDecompType(int n, int dec, int lev) Sets the "component main default" decomposition type and number of levels for the specified component.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

WT_DECOMP_DYADIC

public static final int WT_DECOMP_DYADIC

ID for the dyadic wavelet tree decomposition (also called "Mallat" in JPEG 2000): 0x00.

See Also:

Constant Field Values

WT_DECOMP_SPACL

public static final int WT_DECOMP_SPACL

ID for the SPACL (as defined in JPEG 2000) wavelet tree decomposition (1 level of decomposition in the high bands and some specified number for the lowest LL band): 0x02.

See Also:

Constant Field Values

WT_DECOMP_PACKET

public static final int WT_DECOMP_PACKET

ID for the PACKET (as defined in JPEG 2000) wavelet tree decomposition (2 levels of decomposition in the high bands and some specified number for the lowest LL band): 0x01.

See Also:

Constant Field Values

DEC_SPEC_MAIN_DEF

public static final byte DEC_SPEC_MAIN_DEF

The identifier for "main default" specified decomposition

See Also:

Constant Field Values

DEC_SPEC_COMP_DEF

public static final byte DEC_SPEC_COMP_DEF

The identifier for "component default" specified decomposition

See Also:

Constant Field Values

DEC_SPEC_TILE_DEF

public static final byte DEC_SPEC_TILE_DEF

The identifier for "tile specific default" specified decomposition

See Also:

Constant Field Values

DEC_SPEC_TILE_COMP

public static final byte DEC_SPEC_TILE_COMP

The identifier for "tile and component specific" specified decomposition

See Also:

Constant Field Values

Constructor Detail

WTDecompSpec

public WTDecompSpec(int nc,
                    int dec,
                    int lev)

Constructs a new 'WTDecompSpec' for the specified number of components and tiles, with the given main default decomposition type and number of levels.

NOTE: The tile specific things are not supported yet

Parameters:

nc - The number of components

nt - The number of tiles

dec - The main default decomposition type

lev - The main default number of decomposition levels

Method Detail

setMainCompDefDecompType

public void setMainCompDefDecompType(int n,
                                     int dec,
                                     int lev)

Sets the "component main default" decomposition type and number of levels for the specified component. Both 'dec' and 'lev' can not be negative at the same time.

Parameters:

n - The component index

dec - The decomposition type. If negative then the main default is used.

lev - The number of levels. If negative then the main defaul is used.

getDecSpecType

public byte getDecSpecType(int n)

Returns the type of specification for the decomposition in the specified component and tile. The specification type is one of: 'DEC_SPEC_MAIN_DEF', 'DEC_SPEC_COMP_DEF', 'DEC_SPEC_TILE_DEF', 'DEC_SPEC_TILE_COMP'.

NOTE: The tile specific things are not supported yet

Parameters:

n - The component index

t - The tile index, in raster scan order.

Returns:

The specification type for component 'n' and tile 't'.

getMainDefDecompType

public int getMainDefDecompType()

Returns the main default decomposition type.

Returns:

The main default decomposition type.

getMainDefLevels

public int getMainDefLevels()

Returns the main default decomposition number of levels.

Returns:

The main default decomposition number of levels.

getDecompType

public int getDecompType(int n)

Returns the decomposition type to be used in component 'n' and tile 't'.

NOTE: The tile specific things are not supported yet

Parameters:

n - The component index.

t - The tile index, in raster scan order

Returns:

The decomposition type to be used.

getLevels

public int getLevels(int n)

Returns the decomposition number of levels in component 'n' and tile 't'.

NOTE: The tile specific things are not supported yet

Parameters:

n - The component index.

t - The tile index, in raster scan order

Returns:

The decomposition number of levels.