ImgDataJoiner (Bio-Formats API)

java.lang.Object
- jj2000.j2k.image.ImgDataJoiner

All Implemented Interfaces:

BlkImgDataSrc, ImgData
```
public class ImgDataJoiner
extends Object
implements BlkImgDataSrc
```
This class implements the ImgData interface and allows to obtain data from different sources. Here, one source is represented by an ImgData and a component index. The typical use of this class is when the encoder needs different components (Red, Green, Blue, alpha, ...) from different input files (i.e. from different ImgReader objects).
All input ImgData must not be tiled (i.e. must have only 1 tile) and the image origin must be the canvas origin. The different inputs can have different dimensions though (this will lead to different subsampling factors for each component).

The input ImgData and component index list must be defined when constructing this class and can not be modified later.

See Also:
ImgData, ImgReader

Field Summary

Fields
Modifier and Type	Field and Description
`private int[]`	`compIdx` The component index associated with each ImgData
`private int`	`h` The height of the image
`private BlkImgDataSrc[]`	`imageData` The list of input ImgData
`private int`	`nc` The number of components in the image
`private int[]`	`subsX` The subsampling factor along the horizontal direction, for every component
`private int[]`	`subsY` The subsampling factor along the vertical direction, for every component
`private int`	`w` The width of the image

Constructor Summary

Constructors
Constructor and Description

ImgDataJoiner(BlkImgDataSrc[] imD, int[] cIdx)
Class constructor.

Constructors
Constructor and Description
`ImgDataJoiner(BlkImgDataSrc[] imD, int[] cIdx)` Class constructor.

Method Summary

Methods
Modifier and Type	Method and Description
`DataBlk`	`getCompData(DataBlk blk, int c)` Returns, in the blk argument, a block of image data containing the specifed rectangular area, in the specified component.
`int`	`getCompImgHeight(int n)` 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`	`getFixedPoint(int c)` Returns the position of the fixed point in the specified component.
`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.
`DataBlk`	`getInternCompData(DataBlk blk, int c)` Returns, in the blk argument, a block of image data containing the specifed rectangular area, in the specified component.
`int`	`getNomRangeBits(int c)` Returns the number of bits, referred to as the "range bits", corresponding to the nominal range of the 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.
`Point`	`getNumTiles(Point co)` Returns the number of tiles in the horizontal and vertical directions.
`Point`	`getTile(Point co)` Returns the coordinates 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 coordinates.
`String`	`toString()` Returns a string of information about the object, more than 1 line long.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - w
```
private int w
```
    The width of the image
  - h
```
private int h
```
    The height of the image
  - nc
```
private int nc
```
    The number of components in the image
  - imageData
```
private BlkImgDataSrc[] imageData
```
    The list of input ImgData
  - compIdx
```
private int[] compIdx
```
    The component index associated with each ImgData
  - subsX
```
private int[] subsX
```
    The subsampling factor along the horizontal direction, for every component
  - subsY
```
private int[] subsY
```
    The subsampling factor along the vertical direction, for every component
- Constructor Detail
  - ImgDataJoiner
```
public ImgDataJoiner(BlkImgDataSrc[] imD,
             int[] cIdx)
```
    Class constructor. Each input BlkImgDataSrc and its component index must appear in the order wanted for the output components.
    Example: Reading R,G,B components from 3 PGM files.
    BlkImgDataSrc[] idList = { new ImgReaderPGM(new BEBufferedRandomAccessFile("R.pgm", "r")), new ImgReaderPGM(new BEBufferedRandomAccessFile("G.pgm", "r")), new ImgReaderPGM(new BEBufferedRandomAccessFile("B.pgm", "r")) }; int[] compIdx = {0,0,0}; ImgDataJoiner idj = new ImgDataJoiner(idList, compIdx);
    Of course, the 2 arrays must have the same length (This length is the number of output components). The image width and height are definded to be the maximum values of all the input ImgData.
    
    Parameters:
    imD - The list of input BlkImgDataSrc in an array.
    cIdx - The component index associated with each ImgData.
- Method Detail
  - getTileWidth
```
public int getTileWidth()
```
    Returns the overall width of the current tile in pixels. This is the tile's width without accounting for any component subsampling.
    
    Specified by:
    
    getTileWidth in interface ImgData
    
    Returns:
    The total current tile's width in pixels.
  - getTileHeight
```
public int getTileHeight()
```
    Returns the overall height of the current tile in pixels. This is the tile's height without accounting for any component subsampling.
    
    Specified by:
    
    getTileHeight in interface ImgData
    
    Returns:
    The total current tile's height in pixels.
  - getNomTileWidth
```
public int getNomTileWidth()
```
    Returns the nominal tiles width
    
    Specified by:
    
    getNomTileWidth in interface ImgData
  - getNomTileHeight
```
public int getNomTileHeight()
```
    Returns the nominal tiles height
    
    Specified by:
    
    getNomTileHeight in interface ImgData
  - getImgWidth
```
public 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.
    
    Specified by:
    
    getImgWidth in interface ImgData
    
    Returns:
    The total image's width in pixels.
  - getImgHeight
```
public 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.
    
    Specified by:
    
    getImgHeight in interface ImgData
    
    Returns:
    The total image's height in pixels.
  - getNumComps
```
public int getNumComps()
```
    Returns the number of components in the image.
    
    Specified by:
    
    getNumComps in interface ImgData
    
    Returns:
    The number of components in the image.
  - getCompSubsX
```
public 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.
    
    Specified by:
    
    getCompSubsX in interface ImgData
    
    Parameters:
    c - The index of the component (between 0 and N-1)
    
    Returns:
    The horizontal subsampling factor of component 'c'
    See Also:
    ImgData
  - getCompSubsY
```
public 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.
    
    Specified by:
    
    getCompSubsY in interface ImgData
    
    Parameters:
    c - The index of the component (between 0 and N-1)
    
    Returns:
    The vertical subsampling factor of component 'c'
    See Also:
    ImgData
  - getTileCompWidth
```
public int getTileCompWidth(int t,
                   int c)
```
    Returns the width in pixels of the specified tile-component
    
    Specified by:
    
    getTileCompWidth in interface ImgData
    
    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
```
public int getTileCompHeight(int t,
                    int c)
```
    Returns the height in pixels of the specified tile-component.
    
    Specified by:
    
    getTileCompHeight in interface ImgData
    
    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 the current tile.
  - getCompImgWidth
```
public int getCompImgWidth(int c)
```
    Returns the width in pixels of the specified component in the overall image.
    
    Specified by:
    
    getCompImgWidth in interface ImgData
    
    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
```
public int getCompImgHeight(int n)
```
    Returns the height in pixels of the specified component in the overall image.
    
    Specified by:
    
    getCompImgHeight in interface ImgData
    
    Parameters:
    n - The index of the component, from 0 to N-1.
    
    Returns:
    The height in pixels of component n in the overall image.
  - getNomRangeBits
```
public int getNomRangeBits(int c)
```
    Returns the number of bits, referred to as the "range bits", corresponding to the nominal range of the data in the specified component. If this number is b 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. For floating point data this value is not applicable.
    
    Specified by:
    
    getNomRangeBits in interface ImgData
    
    Parameters:
    c - The index of the component.
    
    Returns:
    The number of bits corresponding to the nominal range of the data. Fro floating-point data this value is not applicable and the return value is undefined.
  getFixedPoint
  
  public int getFixedPoint(int c)
  
  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.
  
  Specified by:
  
  getFixedPoint in interface BlkImgDataSrc
  
  Parameters:
  c - The index of the component.
  
  Returns:
  The position of the fixed-point, which is the same as the number of fractional bits. For floating-point data 0 is returned.
  
  getInternCompData
  
  public DataBlk getInternCompData(DataBlk blk, int c)
  
  Returns, in the blk argument, a block of image data containing the specifed rectangular area, in the specified component. The data is returned, as a reference to the internal data, if any, instead of as a copy, therefore the returned data should not be modified.
  The rectangular area to return is specified by the 'ulx', 'uly', 'w' and 'h' members of the 'blk' argument, relative to the current tile. These members are not modified by this method. The 'offset' and 'scanw' of the returned data can be arbitrary. See the 'DataBlk' class.
  This method, in general, is more efficient than the 'getCompData()' method since it may not copy the data. However if the array of returned data is to be modified by the caller then the other method is probably preferable.
  If the data array in blk is null, then a new one is created if necessary. The implementation of this interface may choose to return the same array or a new one, depending on what is more efficient. Therefore, the data array in blk prior to the method call should not be considered to contain the returned data, a new array may have been created. Instead, get the array from blk after the method has returned.
  The returned data may have its 'progressive' attribute set. In this case the returned data is only an approximation of the "final" data.
  
  Specified by:
  
  getInternCompData in interface BlkImgDataSrc
  
  Parameters:
  blk - Its coordinates and dimensions specify the area to return, relative to the current tile. Some fields in this object are modified to return the data.
  c - The index of the component from which to get the data.
  
  Returns:
  The requested DataBlk
  See Also:
  getCompData(jj2000.j2k.image.DataBlk, int)
  
  getCompData
  
  public DataBlk getCompData(DataBlk blk, int c)
  
  Returns, in the blk argument, a block of image data containing the specifed rectangular area, in the specified component. The data is returned, as a copy of the internal data, therefore the returned data can be modified "in place".
  The rectangular area to return is specified by the 'ulx', 'uly', 'w' and 'h' members of the 'blk' argument, relative to the current tile. These members are not modified by this method. The 'offset' of the returned data is 0, and the 'scanw' is the same as the block's width. See the 'DataBlk' class.
  This method, in general, is less efficient than the 'getInternCompData()' method since, in general, it copies the data. However if the array of returned data is to be modified by the caller then this method is preferable.
  If the data array in 'blk' is 'null', then a new one is created. If the data array is not 'null' then it is reused, and it must be large enough to contain the block's data. Otherwise an 'ArrayStoreException' or an 'IndexOutOfBoundsException' is thrown by the Java system.
  The returned data may have its 'progressive' attribute set. In this case the returned data is only an approximation of the "final" data.
  
  Specified by:
  
  getCompData in interface BlkImgDataSrc
  
  Parameters:
  blk - Its coordinates and dimensions specify the area to return, relative to the current tile. If it contains a non-null data array, then it must be large enough. If it contains a null data array a new one is created. Some fields in this object are modified to return the data.
  c - The index of the component from which to get the data.
  
  Returns:
  The requested DataBlk
  See Also:
  getInternCompData(jj2000.j2k.image.DataBlk, int)
  
  setTile
  
  public void setTile(int x, int y)
  
  Changes the current tile, given the new coordinates. An IllegalArgumentException is thrown if the coordinates do not correspond to a valid tile.
  
  Specified by:
  
  setTile in interface ImgData
  
  Parameters:
  x - The horizontal coordinate of the tile.
  y - The vertical coordinate of the new tile.
  
  nextTile
  
  public void nextTile()
  
  Advances to the next tile, in standard scan-line order (by rows then columns). A NoNextElementException is thrown if the current tile is the last one (i.e. there is no next tile). This default implementation assumes no tiling, so NoNextElementException() is always thrown.
  
  Specified by:
  
  nextTile in interface ImgData
  
  getTile
  
  public Point getTile(Point co)
  
  Returns the coordinates of the current tile. This default implementation assumes no-tiling, so (0,0) is returned.
  
  Specified by:
  
  getTile in interface ImgData
  
  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 coordinates.
  
  getTileIdx
  
  public int getTileIdx()
  
  Returns the index of the current tile, relative to a standard scan-line order. This default implementations assumes no tiling, so 0 is always returned.
  
  Specified by:
  
  getTileIdx in interface ImgData
  
  Returns:
  The current tile's index (starts at 0).
  
  getCompULX
  
  public int getCompULX(int c)
  
  Returns the horizontal coordinate of the upper-left corner of the specified component in the current tile.
  
  Specified by:
  
  getCompULX in interface ImgData
  
  Parameters:
  c - The component index.
  
  getCompULY
  
  public int getCompULY(int c)
  
  Returns the vertical coordinate of the upper-left corner of the specified component in the current tile.
  
  Specified by:
  
  getCompULY in interface ImgData
  
  Parameters:
  c - The component index.
  
  getTilePartULX
  
  public int getTilePartULX()
  
  Returns the horizontal tile partition offset in the reference grid
  
  Specified by:
  
  getTilePartULX in interface ImgData
  
  getTilePartULY
  
  public int getTilePartULY()
  
  Returns the vertical tile partition offset in the reference grid
  
  Specified by:
  
  getTilePartULY in interface ImgData
  
  getImgULX
  
  public int getImgULX()
  
  Returns the horizontal coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
  
  Specified by:
  
  getImgULX in interface ImgData
  
  Returns:
  The horizontal coordinate of the image origin in the canvas system, on the reference grid.
  
  getImgULY
  
  public int getImgULY()
  
  Returns the vertical coordinate of the image origin, the top-left corner, in the canvas system, on the reference grid.
  
  Specified by:
  
  getImgULY in interface ImgData
  
  Returns:
  The vertical coordinate of the image origin in the canvas system, on the reference grid.
  
  getNumTiles
  
  public Point getNumTiles(Point co)
  
  Returns the number of tiles in the horizontal and vertical directions. This default implementation assumes no tiling, so (1,1) is always returned.
  
  Specified by:
  
  getNumTiles in interface ImgData
  
  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.
  
  getNumTiles
  
  public int getNumTiles()
  
  Returns the total number of tiles in the image. This default implementation assumes no tiling, so 1 is always returned.
  
  Specified by:
  
  getNumTiles in interface ImgData
  
  Returns:
  The total number of tiles in the image.
  
  toString
  
  public String toString()
  
  Returns a string of information about the object, more than 1 line long. The information string includes information from the several input ImgData (their toString() method are called one after the other).
  
  Overrides:
  
  toString in class Object
  
  Returns:
  A string of information about the object.

Class ImgDataJoiner

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

w

h

nc

imageData

compIdx

subsX

subsY

Constructor Detail

ImgDataJoiner

Method Detail

getTileWidth

getTileHeight

getNomTileWidth

getNomTileHeight

getImgWidth

getImgHeight

getNumComps

getCompSubsX

getCompSubsY

getTileCompWidth

getTileCompHeight

getCompImgWidth

getCompImgHeight

getNomRangeBits

getFixedPoint

getInternCompData

getCompData

setTile

nextTile

getTile

getTileIdx

getCompULX

getCompULY

getTilePartULX

getTilePartULY

getImgULX

getImgULY

getNumTiles

getNumTiles

toString