jj2000.j2k.wavelet.analysis

Interface ForwWT

All Superinterfaces:

ForwWTDataProps, ImgData, WaveletTransform

All Known Implementing Classes:

ForwardWT, ForwWTFull

public interface ForwWT
extends WaveletTransform, ForwWTDataProps

This interface extends the WaveletTransform with the specifics of forward wavelet transforms. Classes that implement forward wavelet transfoms should implement this interface.

This class does not define the methods to transfer data, just the specifics to forward wavelet transform. Different data transfer methods are evisageable for different transforms.

Field Summary

Fields inherited from interface jj2000.j2k.wavelet.WaveletTransform

WT_IMPL_FULL, WT_IMPL_LINE

Method Summary

Modifier and Type	Method and Description
int	getDecomp(int t, int c) Returns the wavelet tree decomposition.
int	getDecompLevels(int t, int c) Returns the number of decomposition levels that are applied to obtain the LL band, in the specified tile-component.
AnWTFilter[]	getHorAnWaveletFilters(int t, int c) Returns the horizontal analysis wavelet filters used in each level, for the specified tile-component.
AnWTFilter[]	getVertAnWaveletFilters(int t, int c) Returns the vertical analysis wavelet filters used in each level, for the specified tile-component.

Methods inherited from interface jj2000.j2k.wavelet.WaveletTransform

getImplementationType, isReversible

Methods inherited from interface jj2000.j2k.wavelet.analysis.ForwWTDataProps

getAnSubbandTree, getCbULX, getCbULY, isReversible

Methods inherited from interface jj2000.j2k.image.ImgData

getCompImgHeight, getCompImgWidth, getCompSubsX, getCompSubsY, getCompULX, getCompULY, getImgHeight, getImgULX, getImgULY, getImgWidth, getNomRangeBits, getNomTileHeight, getNomTileWidth, getNumComps, getNumTiles, getNumTiles, getTile, getTileCompHeight, getTileCompWidth, getTileHeight, getTileIdx, getTilePartULX, getTilePartULY, getTileWidth, nextTile, setTile

Method Detail

getHorAnWaveletFilters

AnWTFilter[] getHorAnWaveletFilters(int t,
                                    int c)

Returns the horizontal analysis wavelet filters used in each level, for the specified tile-component. The first element in the array is the filter used to obtain the lowest resolution (resolution level 0) subbands (i.e. lowest frequency LL subband), the second element is the one used to generate the resolution level 1 subbands, and so on. If there are less elements in the array than the number of resolution levels, then the last one is assumed to repeat itself.

The returned filters are applicable only to the specified component and in the current tile.

The resolution level of a subband is the resolution level to which a subband contributes, which is different from its decomposition level.

Parameters:

t - The index of the tile for which to return the filters.

c - The index of the component for which to return the filters.

Returns:

The horizontal analysis wavelet filters used in each level.

getVertAnWaveletFilters

AnWTFilter[] getVertAnWaveletFilters(int t,
                                     int c)

Returns the vertical analysis wavelet filters used in each level, for the specified tile-component. The first element in the array is the filter used to obtain the lowest resolution (resolution level 0) subbands (i.e. lowest frequency LL subband), the second element is the one used to generate the resolution level 1 subbands, and so on. If there are less elements in the array than the number of resolution levels, then the last one is assumed to repeat itself.

The returned filters are applicable only to the specified component and in the current tile.

The resolution level of a subband is the resolution level to which a subband contributes, which is different from its decomposition level.

Parameters:

t - The index of the tile for which to return the filters.

c - The index of the component for which to return the filters.

Returns:

The vertical analysis wavelet filters used in each level.

getDecompLevels

int getDecompLevels(int t,
                    int c)

Returns the number of decomposition levels that are applied to obtain the LL band, in the specified tile-component. A value of 0 means that no wavelet transform is applied.

Parameters:

t - The tile index

c - The index of the component.

Returns:

The number of decompositions applied to obtain the LL band (0 for no wavelet transform).

getDecomp

int getDecomp(int t,
              int c)

Returns the wavelet tree decomposition. Only WT_DECOMP_DYADIC is supported by JPEG 2000 part I.

Parameters:

t - The tile index

c - The index of the component.

Returns:

The wavelet decomposition.