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| java.lang.Object
 java.awt.image.BandCombineOp
| BandCombineOp | | public class BandCombineOp implements RasterOp(Code) | | This class performs an arbitrary linear combination of the bands
in a Raster, using a specified matrix.
The width of the matrix must be equal to the number of bands in the
source Raster, optionally plus one. If there is one more
column in the matrix than the number of bands, there is an implied 1 at the
end of the vector of band samples representing a pixel. The height
of the matrix must be equal to the number of bands in the destination.
For example, a 3-banded Raster might have the following
transformation applied to each pixel in order to invert the second band of
the Raster.
[ 1.0 0.0 0.0 0.0 ] [ b1 ]
[ 0.0 -1.0 0.0 255.0 ] x [ b2 ]
[ 0.0 0.0 1.0 0.0 ] [ b3 ]
[ 1 ]
Note that the source and destination can be the same object.
version:
10 Feb 1997 |
| Constructor Summary | |
| public | BandCombineOp(float[][] matrix, RenderingHints hints)
Constructs a BandCombineOp with the specified matrix.
The width of the matrix must be equal to the number of bands in
the source Raster, optionally plus one. |
| Method Summary | |
| public WritableRaster | createCompatibleDestRaster(Raster src)
Creates a zeroed destination Raster with the correct size
and number of bands.
An IllegalArgumentException may be thrown if the number of
bands in the source is incompatible with the matrix. | | public WritableRaster | filter(Raster src, WritableRaster dst)
Transforms the Raster using the matrix specified in the
constructor. | | final public Rectangle2D | getBounds2D(Raster src)
Returns the bounding box of the transformed destination. | | final public float[][] | getMatrix()
Returns a copy of the linear combination matrix. | | final public Point2D | getPoint2D(Point2D srcPt, Point2D dstPt)
Returns the location of the corresponding destination point given a
point in the source Raster. | | final public RenderingHints | getRenderingHints()
Returns the rendering hints for this operation. |
| BandCombineOp | | public BandCombineOp(float[][] matrix, RenderingHints hints)(Code) | | Constructs a BandCombineOp with the specified matrix.
The width of the matrix must be equal to the number of bands in
the source Raster, optionally plus one. If there is one
more column in the matrix than the number of bands, there is an implied
1 at the end of the vector of band samples representing a pixel. The
height of the matrix must be equal to the number of bands in the
destination.
The first subscript is the row index and the second
is the column index. This operation uses none of the currently
defined rendering hints; the RenderingHints argument can be
null.
Parameters:
matrix - The matrix to use for the band combine operation.
Parameters:
hints - The RenderingHints object for this operation. Not currently used so it can be null. |
| createCompatibleDestRaster | | public WritableRaster createCompatibleDestRaster(Raster src)(Code) | | Creates a zeroed destination Raster with the correct size
and number of bands.
An IllegalArgumentException may be thrown if the number of
bands in the source is incompatible with the matrix. See
the class comments for more details.
Parameters:
src - The Raster to be filtered. The zeroed destination Raster. |
| filter | | public WritableRaster filter(Raster src, WritableRaster dst)(Code) | | Transforms the Raster using the matrix specified in the
constructor. An IllegalArgumentException may be thrown if
the number of bands in the source or destination is incompatible with
the matrix. See the class comments for more details.
If the destination is null, it will be created with a number of bands
equalling the number of rows in the matrix. No exception is thrown
if the operation causes a data overflow.
Parameters:
src - The Raster to be filtered.
Parameters:
dst - The Raster in which to store the results of the filter operation. The filtered Raster.
throws:
IllegalArgumentException - If the number of bands in the source or destination is incompatible with the matrix. |
| getBounds2D | | final public Rectangle2D getBounds2D(Raster src)(Code) | | Returns the bounding box of the transformed destination. Since
this is not a geometric operation, the bounding box is the same for
the source and destination.
An IllegalArgumentException may be thrown if the number of
bands in the source is incompatible with the matrix. See
the class comments for more details.
Parameters:
src - The Raster to be filtered. The Rectangle2D representing the destination image's bounding box.
throws:
IllegalArgumentException - If the number of bands in the sourceis incompatible with the matrix. |
| getMatrix | | final public float[][] getMatrix()(Code) | | Returns a copy of the linear combination matrix.
The matrix associated with this band combine operation. |
| getPoint2D | | final public Point2D getPoint2D(Point2D srcPt, Point2D dstPt)(Code) | | Returns the location of the corresponding destination point given a
point in the source Raster. If dstPt is
specified, it is used to hold the return value.
Since this is not a geometric operation, the point returned
is the same as the specified srcPt.
Parameters:
srcPt - The Point2D that represents the point inthe source Raster
Parameters:
dstPt - The Point2D in which to store the result. The Point2D in the destination image that corresponds to the specified point in the source image. |
| getRenderingHints | | final public RenderingHints getRenderingHints()(Code) | | Returns the rendering hints for this operation.
The RenderingHints object associated with thisoperation. Returns null if no hints have been set. |
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