ImgData (Unidata jj2000 5.2 API)

All Known Subinterfaces:

BlkImgDataSrc, CBlkQuantDataSrcEnc, CBlkWTDataSrc, CodedCBlkDataSrcEnc, ForwWT, ForwWTDataProps, InvWT, WaveletTransform

All Known Implementing Classes:

ChannelDefinitionMapper, ColorSpaceMapper, EBCOTRateAllocator, EntropyCoder, EnumeratedColorSpaceMapper, ForwardWT, ForwCompTransf, ForwWTFull, ICCProfiler, ImgDataAdapter, ImgDataConverter, ImgDataJoiner, ImgReader, ImgReaderPGM, ImgReaderPGX, ImgReaderPPM, InvCompTransf, InverseWT, InvWTAdapter, InvWTFull, PalettizedColorSpaceMapper, PostCompRateAllocator, Quantizer, Resampler, ROIScaler, StdEntropyCoder, StdQuantizer, SYccColorSpaceMapper, Tiler
```
public interface ImgData
```
This interface defines methods to access image attributes (width, height, number of components, etc.). 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 image data, such as image file readers, color transforms, wavelet transforms, etc. This interface, however, does not define methods to transfer image data (i.e. pixel data), that is defined by other interfaces, such as 'BlkImgDataSrc'.

See Also:
BlkImgDataSrc

Method Summary

Methods
Modifier and Type	Method and Description
`int`	`getCompImgHeight(int c)` Returns the height in pixels of the specified component in the overall image.
`int`	`getCompImgWidth(int c)` Returns the width in pixels of the specified component in the overall image.
`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`	`getCompULX(int c)` Returns the horizontal coordinate of the upper-left corner of the specified component in the current tile.
`int`	`getCompULY(int c)` Returns the vertical coordinate of the upper-left corner of the specified component in the current tile.
`int`	`getImgHeight()` Returns the overall height of the image in pixels.
`int`	`getImgULX()` Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
`int`	`getImgULY()` Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
`int`	`getImgWidth()` Returns the overall width of the image in pixels.
`int`	`getNomRangeBits(int c)` Returns the number of bits, referred to as the "range bits", corresponding to the nominal range of the image data in the specified component.
`int`	`getNomTileHeight()` Returns the nominal tiles height
`int`	`getNomTileWidth()` Returns the nominal tiles width
`int`	`getNumComps()` Returns the number of components in the image.
`int`	`getNumTiles()` Returns the total number of tiles in the image.
`Coord`	`getNumTiles(Coord co)` Returns the number of tiles in the horizontal and vertical directions.
`Coord`	`getTile(Coord co)` Returns the indixes of the current tile.
`int`	`getTileCompHeight(int t, int c)` Returns the height in pixels of the specified tile-component.
`int`	`getTileCompWidth(int t, int c)` Returns the width in pixels of the specified tile-component
`int`	`getTileHeight()` Returns the overall height of the current tile in pixels.
`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 grid
`int`	`getTilePartULY()` Returns the vertical tile partition offset in the reference grid
`int`	`getTileWidth()` Returns the overall width of the current tile in pixels.
`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 indices.

- Method Detail
  - getTileWidth
```
int getTileWidth()
```
    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.
    
    Returns:
    The total current tile's width in pixels.
  - getTileHeight
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int getTileHeight()
```
    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.
    
    Returns:
    The total current tile's height in pixels.
  - getNomTileWidth
```
int getNomTileWidth()
```
    Returns the nominal tiles width
  - getNomTileHeight
```
int getNomTileHeight()
```
    Returns the nominal tiles height
  - getImgWidth
```
int getImgWidth()
```
    Returns the overall width of the image in pixels. This is the image's width without accounting for any component subsampling or tiling.
    
    Returns:
    The total image's width in pixels.
  - getImgHeight
```
int getImgHeight()
```
    Returns the overall height of the image in pixels. This is the image's height without accounting for any component subsampling or tiling.
    
    Returns:
    The total image's height in pixels.
  - getNumComps
```
int getNumComps()
```
    Returns the number of components in the image.
    
    Returns:
    The number of components in the image.
  - 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
  - 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
  - getTileCompWidth
```
int getTileCompWidth(int t,
                   int c)
```
    Returns the width in pixels of the specified tile-component
    
    Parameters:
    t - Tile index
    c - The index of the component, from 0 to N-1.
    
    Returns:
    The width in pixels of component c in tilet.
  - getTileCompHeight
```
int getTileCompHeight(int t,
                    int c)
```
    Returns the height in pixels of the specified tile-component.
    
    Parameters:
    t - The tile index.
    c - The index of the component, from 0 to N-1.
    
    Returns:
    The height in pixels of component c in tile t.
  - getCompImgWidth
```
int getCompImgWidth(int c)
```
    Returns the width in pixels of the specified component in the overall image.
    
    Parameters:
    c - The index of the component, from 0 to N-1.
    
    Returns:
    The width in pixels of component c in the overall image.
  - getCompImgHeight
```
int getCompImgHeight(int c)
```
    Returns the height in pixels of the specified component in the overall image.
    
    Parameters:
    c - The index of the component, from 0 to N-1.
    
    Returns:
    The height in pixels of component n in the overall image.
  - getNomRangeBits
```
int getNomRangeBits(int c)
```
    Returns the number of bits, referred to as the "range bits", corresponding to the nominal range of the image data in the specified component. If this number is n then for unsigned data the nominal range is between 0 and 2^b-1, and for signed data it is between -2^(b-1) and 2^(b-1)-1. In the case of transformed data which is not in the image domain (e.g., wavelet coefficients), this method returns the "range bits" of the image data that generated the coefficients.
    
    Parameters:
    c - The index of the component.
    
    Returns:
    The number of bits corresponding to the nominal range of the image data (in the image domain).
  setTile
  
  void setTile(int x, int y)
  
  Changes the current tile, given the new indices. An IllegalArgumentException is thrown if the coordinates do not correspond to a valid tile.
  
  Parameters:
  x - The horizontal index of the tile.
  y - The vertical index of the new tile.
  
  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).
  
  getTile
  
  Coord getTile(Coord co)
  
  Returns the indixes 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 indices (vertical and horizontal indexes).
  
  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).
  
  getTilePartULX
  
  int getTilePartULX()
  
  Returns the horizontal tile partition offset in the reference grid
  
  getTilePartULY
  
  int getTilePartULY()
  
  Returns the vertical tile partition offset in the reference grid
  
  getCompULX
  
  int getCompULX(int c)
  
  Returns the horizontal coordinate of the upper-left corner of the specified component in the current tile.
  
  Parameters:
  c - The index of the component.
  
  getCompULY
  
  int getCompULY(int c)
  
  Returns the vertical coordinate of the upper-left corner of the specified component in the current tile.
  
  Parameters:
  c - The index of the component.
  
  getImgULX
  
  int getImgULX()
  
  Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
  
  Returns:
  The horizontal coordinate of the image origin in the canvas system, on the reference grid.
  
  getImgULY
  
  int getImgULY()
  
  Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
  
  Returns:
  The vertical coordinate of the image origin in the canvas system, on the reference grid.
  
  getNumTiles
  
  Coord getNumTiles(Coord 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 (Coord.x) and vertical (Coord.y) directions.
  
  getNumTiles
  
  int getNumTiles()
  
  Returns the total number of tiles in the image.
  
  Returns:
  The total number of tiles in the image.

Interface ImgData

Method Summary

Method Detail

getTileWidth

getTileHeight

getNomTileWidth

getNomTileHeight

getImgWidth

getImgHeight

getNumComps

getCompSubsX

getCompSubsY

getTileCompWidth

getTileCompHeight

getCompImgWidth

getCompImgHeight

getNomRangeBits

setTile

nextTile

getTile

getTileIdx

getTilePartULX

getTilePartULY

getCompULX

getCompULY

getImgULX

getImgULY

getNumTiles

getNumTiles