The following tables list the members exposed by StdQuantizer.
| Name | Description | |
|---|---|---|
 | StdQuantizer Constructor | Initializes the source of wavelet transform coefficients. The constructor takes information on whether the quantizer is in reversible, derived or expounded mode. If the quantizer is reversible the value of 'derived' is ignored. If the source data is not integer (int) then the quantizer can not be reversible.
After initializing member attributes, getAnSubbandTree is called for all components setting the 'stepWMSE' for all subbands in the current tile. |
| Name | Description | |
|---|---|---|
 | QSTEP_EXPONENT_BITS | The number of exponent bits for the quantization steps |
| QSTEP_MANTISSA_BITS | The number of mantissa bits for the quantization steps |
 | QSTEP_MAX_EXPONENT | The maximum value of the exponent for the quantization steps |
| QSTEP_MAX_MANTISSA | The maximum value of the mantissa for the quantization steps |
| Name | Description | |
|---|---|---|
 | CbULX | Returns the horizontal offset of the code-block partition. Allowable values are 0 and 1, nothing else. (Inherited from CSJ2K.j2k.quantization.quantizer.Quantizer) |
| CbULY | Returns the vertical offset of the code-block partition. Allowable values are 0 and 1, nothing else. (Inherited from CSJ2K.j2k.quantization.quantizer.Quantizer) |
| ImgHeight | Returns the overall height of the image in pixels. This is the image's height without accounting for any component subsampling or tiling.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| ImgULX | Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| ImgULY | Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| ImgWidth | Returns the overall width of the image in pixels. This is the image's width without accounting for any component subsampling or tiling.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| NomTileHeight | Returns the nominal tiles height (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| NomTileWidth | Returns the nominal tiles width (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| NumComps | Returns the number of components in the image.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| QuantTypeSpec | Returns the quantization type spec object associated to the quantizer. |
| TileHeight | Returns the overall height of the current tile in pixels. This is the tile's height without accounting for any component subsampling. This is also referred as the reference grid height in the current tile.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| TileIdx | Returns the index of the current tile, relative to a standard scan-line order.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| TilePartULX | Returns the horizontal tile partition offset in the reference grid (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| TilePartULY | Returns the vertical tile offset in the reference grid (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| TileWidth | Returns the overall width of the current tile in pixels. This is the tile's width without accounting for any component subsampling. This is also referred as the reference grid width in the current tile.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| Name | Description | |
|---|---|---|
 | convertToExpMantissa | Converts the floating point value to its exponent-mantissa representation. The mantissa occupies the 11 least significant bits (bits 10-0), and the exponent the previous 5 bits (bits 15-11). |
| getAnSubbandTree | (Inherited from CSJ2K.j2k.quantization.quantizer.Quantizer) |
| getCompImgHeight | Returns the height in pixels of the specified component in the overall image.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getCompImgWidth | Returns the width in pixels of the specified component in the overall image.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getCompSubsX | Returns the component subsampling factor in the horizontal direction, for the specified component. This is, approximately, the ratio of dimensions between the reference grid and the component itself, see the 'ImgData' interface desription for details.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getCompSubsY | Returns the component subsampling factor in the vertical direction, for the specified component. This is, approximately, the ratio of dimensions between the reference grid and the component itself, see the 'ImgData' interface desription for details.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getCompULX | Returns the horizontal coordinate of the upper-left corner of the specified component in the current tile.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getCompULY | Returns the vertical coordinate of the upper-left corner of the specified component in the current tile.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getMaxMagBits | Overridden. Returns the maximum number of magnitude bits in any subband of the current tile. |
| getNextCodeBlock | Overridden. 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 data. Therfore 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. 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. |
| getNextInternCodeBlock | Overridden. 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 can be the data in the internal buffer of this object, if any, and thus can not be modified by the caller. The 'offset' and 'scanw' of the returned data can be arbitrary. 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. |
| getNomRangeBits | (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getNumGuardBits | Overridden. Returns the number of guard bits used by this quantizer in the given tile-component. |
| getNumTiles | Overloaded. Returns the number of tiles in the horizontal and vertical directions.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getTile | Returns the indexes of the current tile. These are the horizontal and vertical indexes of the current tile.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getTileCompHeight | Returns the height in pixels of the specified tile-component.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| getTileCompWidth | Returns the width in pixels of the specified tile-component tile.
This default implementation returns the value of the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| isDerived | Overridden. Returns true if given tile-component uses derived quantization step sizes. |
| isReversible | Overridden. Returns true if the quantized data is reversible, for the specified tile-component. For the quantized data to be reversible it is necessary and sufficient that the quantization is reversible. |
| nextTile | 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 default implementation just advances to the next tile in the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
| setTile | Changes the current tile, given the new indexes. An IllegalArgumentException is thrown if the indexes do not correspond to a valid tile.
This default implementation just changes the tile in the source. (Inherited from CSJ2K.j2k.image.ImgDataAdapter) |
