| java.lang.Object
 jj2000.j2k.image.ImgDataAdapter
jj2000.j2k.wavelet.analysis.ForwardWT
jj2000.j2k.wavelet.analysis.ForwWTFull
| ForwWTFull | | public class ForwWTFull extends ForwardWT (Code) | | This class implements the ForwardWT with the full-page approach to be used
either with integer or floating-point filters
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| Method Summary | |
| public SubbandAn | getAnSubbandTree(int t, int c)
Returns a reference to the subband tree structure representing the
subband decomposition for the specified tile-component of the source.
Parameters:
t - The index of the tile.
Parameters:
c - The index of the component. | | public int | getCbULX()
Returns the horizontal offset of the code-block partition. | | public int | getCbULY()
Returns the vertical offset of the code-block partition. | | public int | getDataType(int t, int c)
Return the data type of this CBlkWTDataSrc. | | public int | getDecomp(int t, int c)
Returns the wavelet tree decomposition. | | public int | getDecompLevels(int t, int c)
Returns the number of decomposition levels that are applied to the LL
band, in the specified tile-component. | | public int | getFixedPoint(int c)
Returns the position of the fixed point in the specified
component. | | public AnWTFilter[] | getHorAnWaveletFilters(int t, int c)
Returns the horizontal analysis wavelet filters used in each level, for
the specified component and tile. | | public int | getImplementationType(int c)
Returns the implementation type of this wavelet transform, WT_IMPL_FULL
(full-page based transform). | | public CBlkWTData | getNextCodeBlock(int c, CBlkWTData cblk)
Returns the next code-block in the current tile for the specified
component, as a copy (see below). | | public CBlkWTData | getNextInternCodeBlock(int c, CBlkWTData cblk)
Returns the next code-block in the current tile for the specified
component. | | public AnWTFilter[] | getVertAnWaveletFilters(int t, int c)
Returns the vertical analysis wavelet filters used in each level, for
the specified component and tile. | | public boolean | isReversible(int t, int c)
Returns the reversibility of the wavelet transform for the specified
component and tile. | | public void | nextTile()
Advances to the next tile, in standard scan-line order (by rows then
columns). | | public void | setTile(int x, int y)
Changes the current tile, given the new coordinates.
This method resets the 'subbTrees' array, and recalculates the
values of the 'reversible' array. |
| currentSubband | | SubbandAn currentSubband(Code) | | The subband being dealt with in each component
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| ncblks | | Point ncblks(Code) | | Cache object to avoid excessive allocation/deallocation. This variable
makes the class inheritently thread unsafe.
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| ForwWTFull | | public ForwWTFull(BlkImgDataSrc src, J2KImageWriteParamJava wp, int pox, int poy)(Code) | | Initializes this object with the given source of image data and with
all the decompositon parameters
Parameters:
src - From where the image data should be obtained.
Parameters:
encSpec - The encoder specifications
Parameters:
pox - The horizontal coordinate of the cell and code-blockpartition origin with respect to the canvas origin, on the referencegrid.
Parameters:
poy - The vertical coordinate of the cell and code-block partitionorigin with respect to the canvas origin, on the reference grid.
See Also: ForwardWT |
| getAnSubbandTree | | public SubbandAn getAnSubbandTree(int t, int c)(Code) | | Returns a reference to the subband tree structure representing the
subband decomposition for the specified tile-component of the source.
Parameters:
t - The index of the tile.
Parameters:
c - The index of the component. The subband tree structure, see Subband.
See Also: SubbandAn
See Also: Subband |
| getCbULX | | public int getCbULX()(Code) | | Returns the horizontal offset of the code-block partition. Allowable
values are 0 and 1, nothing else.
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| getCbULY | | public int getCbULY()(Code) | | Returns the vertical offset of the code-block partition. Allowable
values are 0 and 1, nothing else.
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| getDataType | | public int getDataType(int t, int c)(Code) | | Return the data type of this CBlkWTDataSrc. Its value should be either
DataBlk.TYPE_INT or DataBlk.TYPE_FLOAT but can change according to the
current tile-component.
Parameters:
t - The index of the tile for which to return the data type.
Parameters:
c - The index of the component for which to return the data type. Current data type |
| getDecomp | | public int getDecomp(int t, int c)(Code) | | Returns the wavelet tree decomposition. Actually JPEG 2000 part 1 only
supports WT_DECOMP_DYADIC decomposition.
Parameters:
t - The tile-index
Parameters:
c - The index of the component. The wavelet decomposition. |
| getDecompLevels | | public int getDecompLevels(int t, int c)(Code) | | Returns the number of decomposition levels that are applied to the LL
band, in the specified tile-component. A value of 0 means that no
wavelet transform is applied.
Parameters:
t - The tile index
Parameters:
c - The index of the component. The number of decompositions applied to the LL band (0 for nowavelet transform). |
| getFixedPoint | | public int getFixedPoint(int c)(Code) | | Returns the position of the fixed point in the specified
component. This is the position of the least significant integral
(i.e. non-fractional) bit, which is equivalent to the number of
fractional bits. For instance, for fixed-point values with 2 fractional
bits, 2 is returned. For floating-point data this value does not apply
and 0 should be returned. Position 0 is the position of the least
significant bit in the data.
Parameters:
c - The index of the component. The position of the fixed-point, which is the same as thenumber of fractional bits. For floating-point data 0 is returned. |
| getHorAnWaveletFilters | | public AnWTFilter[] getHorAnWaveletFilters(int t, int c)(Code) | | Returns the horizontal analysis wavelet filters used in each level, for
the specified component and tile. 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.
Parameters:
c - The index of the component for which to return the filters. The horizontal analysis wavelet filters used in each level. |
| getImplementationType | | public int getImplementationType(int c)(Code) | | Returns the implementation type of this wavelet transform, WT_IMPL_FULL
(full-page based transform). All components return the same.
Parameters:
c - The index of the component. WT_IMPL_FULL |
| getNextCodeBlock | | public CBlkWTData getNextCodeBlock(int c, CBlkWTData cblk)(Code) | | Returns the next code-block in the current tile for the specified
component, as a copy (see below). The order in which code-blocks are
returned is not specified. However each code-block is returned only
once and all code-blocks will be returned if the method is called 'N'
times, where 'N' is the number of code-blocks in the tile. After all
the code-blocks have been returned for the current tile calls to this
method will return 'null'.
When changing the current tile (through 'setTile()' or 'nextTile()')
this method will always return the first code-block, as if this method
was never called before for the new current tile.
The data returned by this method is always a copy of the internal
data of this object, and it can be modified "in place" without
any problems after being returned. The 'offset' of the returned data is
0, and the 'scanw' is the same as the code-block width. The 'magbits'
of the returned data is not set by this method and should be
ignored. See the 'CBlkWTData' class.
The 'ulx' and 'uly' members of the returned 'CBlkWTData' object
contain the coordinates of the top-left corner of the block, with
respect to the tile, not the subband.
Parameters:
c - The component for which to return the next code-block.
Parameters:
cblk - If non-null this object will be used to return the newcode-block. If null a new one will be allocated and returned. If the"data" array of the object is non-null it will be reused, if possible,to return the data. The next code-block in the current tile for component 'c', ornull if all code-blocks for the current tile have been returned.
See Also: CBlkWTData |
| getNextInternCodeBlock | | public CBlkWTData getNextInternCodeBlock(int c, CBlkWTData cblk)(Code) | | Returns the next code-block in the current tile for the specified
component. The order in which code-blocks are returned is not
specified. However each code-block is returned only once and all
code-blocks will be returned if the method is called 'N' times, where
'N' is the number of code-blocks in the tile. After all the code-blocks
have been returned for the current tile calls to this method will
return 'null'.
When changing the current tile (through 'setTile()' or 'nextTile()')
this method will always return the first code-block, as if this method
was never called before for the new current tile.
The data returned by this method is the data in the internal buffer
of this object, and thus can not be modified by the caller. The
'offset' and 'scanw' of the returned data have, in general, some
non-zero value. The 'magbits' of the returned data is not set by this
method and should be ignored. See the 'CBlkWTData' class.
The 'ulx' and 'uly' members of the returned 'CBlkWTData' object
contain the coordinates of the top-left corner of the block, with
respect to the tile, not the subband.
Parameters:
c - The component for which to return the next code-block.
Parameters:
cblk - If non-null this object will be used to return the newcode-block. If null a new one will be allocated and returned. The next code-block in the current tile for component 'n', ornull if all code-blocks for the current tile have been returned.
See Also: CBlkWTData |
| getVertAnWaveletFilters | | public AnWTFilter[] getVertAnWaveletFilters(int t, int c)(Code) | | Returns the vertical analysis wavelet filters used in each level, for
the specified component and tile. 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.
Parameters:
c - The index of the component for which to return the filters. The vertical analysis wavelet filters used in each level. |
| isReversible | | public boolean isReversible(int t, int c)(Code) | | Returns the reversibility of the wavelet transform for the specified
component and tile. A wavelet transform is reversible when it is
suitable for lossless and lossy-to-lossless compression.
Parameters:
t - The index of the tile.
Parameters:
c - The index of the component. true is the wavelet transform is reversible, false if not. |
| nextTile | | public void nextTile()(Code) | | Advances to the next tile, in standard scan-line order (by rows then
columns). An NoNextElementException is thrown if the current tile is
the last one (i.e. there is no next tile).
This method resets the 'subbTrees' array, and recalculates the
values of the 'reversible' array. It also resets the decomposed
component buffers.
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| setTile | | public void setTile(int x, int y)(Code) | | Changes the current tile, given the new coordinates.
This method resets the 'subbTrees' array, and recalculates the
values of the 'reversible' array. It also resets the decomposed
component buffers.
Parameters:
x - The horizontal coordinate of the tile.
Parameters:
y - The vertical coordinate of the new tile. |
| Fields inherited from jj2000.j2k.wavelet.analysis.ForwardWT | final public static char OPT_PREFIX(Code)(Java Doc)
final public static int WT_DECOMP_DYADIC(Code)(Java Doc)
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