Interface MultiResImgData
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- All Known Subinterfaces:
CBlkQuantDataSrcDec
,CBlkWTDataSrcDec
,CodedCBlkDataSrcDec
,InvWTData
- All Known Implementing Classes:
BitstreamReaderAgent
,Dequantizer
,EntropyDecoder
,FileBitstreamReaderAgent
,MultiResImgDataAdapter
,ROIDeScaler
,StdDequantizer
,StdEntropyDecoder
public interface MultiResImgData
This interface defines methods to access image attributes (width, height, number of components, etc.) of multiresolution images, such as those resulting from an inverse wavelet transform. The image can be tiled or not (i.e. if the image is not tiled then there is only 1 tile). It should be implemented by all classes that provide multi-resolution image data, such as entropy decoders, dequantizers, etc. This interface, however, does not define methods to transfer image data (i.e. pixel data), that is defined by other interfaces, such as 'CBlkQuantDataSrcDec'.This interface is very similar to the 'ImgData' one. It differs only by the fact that it handles multiple resolutions.
Resolution levels are counted from 0 to L. Resolution level 0 is the lower resolution, while L is the maximum resolution level, or full resolution, which is returned by 'getMaxResLvl()'. Note that there are L+1 resolution levels available.
As in the 'ImgData' interface a multi-resolution image lies on top of a canvas. The canvas coordinates are mapped from the full resolution reference grid (i.e. resolution level 'L' reference grid) to a resolution level 'l' reference grid by '(x_l,y_l) = (ceil(x_l/2^(L-l)),ceil(y_l/2^(L-l)))', where '(x,y)' are the full resolution reference grid coordinates and '(x_l,y_l)' are the level 'l' reference grid coordinates.
For details on the canvas system and its implications consult the 'ImgData' interface.
Note that tile sizes may not be obtained by simply dividing the tile size in the reference grid by the subsampling factor.
- See Also:
ImgData
,CBlkQuantDataSrcDec
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description int
getCompImgHeight(int n, int rl)
Returns the height in pixels of the specified component in the overall image, for the given resolution level.int
getCompImgWidth(int c, int rl)
Returns the width in pixels of the specified component in the overall image, for the given resolution level.int
getCompSubsX(int c)
Returns the component subsampling factor in the horizontal direction, for the specified component.int
getCompSubsY(int c)
Returns the component subsampling factor in the vertical direction, for the specified component.int
getImgHeight(int rl)
Returns the overall height of the image in pixels, for the given resolution level.int
getImgULX(int rl)
Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level.int
getImgULY(int rl)
Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level.int
getImgWidth(int rl)
Returns the overall width of the image in pixels, for the given resolution level.int
getNomTileHeight()
Returns the nominal tiles heightint
getNomTileWidth()
Returns the nominal tiles widthint
getNumComps()
Returns the number of components in the image.int
getNumTiles()
Returns the total number of tiles in the image.Point
getNumTiles(Point co)
Returns the number of tiles in the horizontal and vertical directions.int
getResULX(int c, int rl)
Returns the horizontal coordinate of the upper-left corner of the specified resolution in the given component of the current tile.int
getResULY(int c, int rl)
Returns the vertical coordinate of the upper-left corner of the specified resolution in the given component of the current tile.SubbandSyn
getSynSubbandTree(int t, int c)
Returns the specified synthesis subband treePoint
getTile(Point co)
Returns the indexes of the current tile.int
getTileCompHeight(int t, int c, int rl)
Returns the height in pixels of the specified tile-component for the given resolution level.int
getTileCompWidth(int t, int c, int rl)
Returns the width in pixels of the specified tile-component for the given resolution level.int
getTileHeight(int rl)
Returns the overall height of the current tile in pixels, for the given resolution level.int
getTileIdx()
Returns the index of the current tile, relative to a standard scan-line order.int
getTilePartULX()
Returns the horizontal tile partition offset in the reference gridint
getTilePartULY()
Returns the vertical tile partition offset in the reference gridint
getTileWidth(int rl)
Returns the overall width of the current tile in pixels for the given resolution level.void
nextTile()
Advances to the next tile, in standard scan-line order (by rows then columns).void
setTile(int x, int y)
Changes the current tile, given the new indexes.
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Method Detail
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getTileWidth
int getTileWidth(int rl)
Returns the overall width of the current tile in pixels for the given resolution level. This is the tile's width without accounting for any component subsampling. The resolution level is indexed from the lowest number of resolution levels of all components of the current tile.- Parameters:
rl
- The resolution level, from 0 to L.- Returns:
- The total current tile's width in pixels.
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getTileHeight
int getTileHeight(int rl)
Returns the overall height of the current tile in pixels, for the given resolution level. This is the tile's height without accounting for any component subsampling. The resolution level is indexed from the lowest number of resolution levels of all components of the current tile.- Parameters:
rl
- The resolution level, from 0 to L.- Returns:
- The total current tile's height in pixels.
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getNomTileWidth
int getNomTileWidth()
Returns the nominal tiles width
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getNomTileHeight
int getNomTileHeight()
Returns the nominal tiles height
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getImgWidth
int getImgWidth(int rl)
Returns the overall width of the image in pixels, for the given resolution level. This is the image's width without accounting for any component subsampling or tiling. The resolution level is indexed from the lowest number of resolution levels of all components of the current tile.- Parameters:
rl
- The resolution level, from 0 to L.- Returns:
- The total image's width in pixels.
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getImgHeight
int getImgHeight(int rl)
Returns the overall height of the image in pixels, for the given resolution level. This is the image's height without accounting for any component subsampling or tiling. The resolution level is indexed from the lowest number of resolution levels of all components of the current tile.- Parameters:
rl
- The resolution level, from 0 to L.- Returns:
- The total image's height in pixels.
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getNumComps
int getNumComps()
Returns the number of components in the image.- Returns:
- The number of components in the image.
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getCompSubsX
int getCompSubsX(int c)
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.- Parameters:
c
- The index of the component (between 0 and N-1)- Returns:
- The horizontal subsampling factor of component 'c'
- See Also:
ImgData
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getCompSubsY
int getCompSubsY(int c)
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.- Parameters:
c
- The index of the component (between 0 and N-1)- Returns:
- The vertical subsampling factor of component 'c'
- See Also:
ImgData
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getTileCompWidth
int getTileCompWidth(int t, int c, int rl)
Returns the width in pixels of the specified tile-component for the given resolution level.- Parameters:
t
- Tile indexc
- The index of the component, from 0 to N-1.rl
- The resolution level, from 0 to L.- Returns:
- The width in pixels of component c in tile t for resolution rl.
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getTileCompHeight
int getTileCompHeight(int t, int c, int rl)
Returns the height in pixels of the specified tile-component for the given resolution level.- Parameters:
t
- The tile index.c
- The index of the component, from 0 to N-1.rl
- The resolution level, from 0 to L.- Returns:
- The height in pixels of component c in tile t.
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getCompImgWidth
int getCompImgWidth(int c, int rl)
Returns the width in pixels of the specified component in the overall image, for the given resolution level.- Parameters:
c
- The index of the component, from 0 to N-1.rl
- The resolution level, from 0 to L.- Returns:
- The width in pixels of component c in the overall image.
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getCompImgHeight
int getCompImgHeight(int n, int rl)
Returns the height in pixels of the specified component in the overall image, for the given resolution level.- Parameters:
n
- The index of the component, from 0 to N-1.rl
- The resolution level, from 0 to L.- Returns:
- The height in pixels of component n in the overall image.
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setTile
void setTile(int x, int y)
Changes the current tile, given the new indexes. An IllegalArgumentException is thrown if the indexes do not correspond to a valid tile.- Parameters:
x
- The horizontal indexes the tile.y
- The vertical indexes of the new tile.
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nextTile
void 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).
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getTile
Point getTile(Point co)
Returns the indexes of the current tile. These are the horizontal and vertical indexes of the current tile.- Parameters:
co
- If not null this object is used to return the information. If null a new one is created and returned.- Returns:
- The current tile's indexes (vertical and horizontal indexes).
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getTileIdx
int getTileIdx()
Returns the index of the current tile, relative to a standard scan-line order.- Returns:
- The current tile's index (starts at 0).
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getResULX
int getResULX(int c, int rl)
Returns the horizontal coordinate of the upper-left corner of the specified resolution in the given component of the current tile.- Parameters:
c
- The component index.rl
- The resolution level index.
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getResULY
int getResULY(int c, int rl)
Returns the vertical coordinate of the upper-left corner of the specified resolution in the given component of the current tile.- Parameters:
c
- The component index.rl
- The resolution level index.
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getImgULX
int getImgULX(int rl)
Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level. The resolution level is indexed from the lowest number of resolution levels of all components of the current tile.- Parameters:
rl
- The resolution level, from 0 to L.- Returns:
- The horizontal coordinate of the image origin in the canvas system, on the reference grid.
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getImgULY
int getImgULY(int rl)
Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid at the specified resolution level. The resolution level is indexed from the lowest number of resolution levels of all components of the current tile.- Parameters:
rl
- The resolution level, from 0 to L.- Returns:
- The vertical coordinate of the image origin in the canvas system, on the reference grid.
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getTilePartULX
int getTilePartULX()
Returns the horizontal tile partition offset in the reference grid
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getTilePartULY
int getTilePartULY()
Returns the vertical tile partition offset in the reference grid
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getNumTiles
Point getNumTiles(Point co)
Returns the number of tiles in the horizontal and vertical directions.- Parameters:
co
- If not null this object is used to return the information. If null a new one is created and returned.- Returns:
- The number of tiles in the horizontal (Point.x) and vertical (Point.y) directions.
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getNumTiles
int getNumTiles()
Returns the total number of tiles in the image.- Returns:
- The total number of tiles in the image.
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getSynSubbandTree
SubbandSyn getSynSubbandTree(int t, int c)
Returns the specified synthesis subband tree- Parameters:
t
- Tile index.c
- Component index.
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