public class BandCombineOp extends Object implements RasterOp
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.
| Constructor and Description |
|---|
BandCombineOp(float[][] matrix,
RenderingHints hints)
Constructs a
BandCombineOp with the specified matrix. |
| Modifier and Type | Method and Description |
|---|---|
WritableRaster |
createCompatibleDestRaster(Raster src)
Creates a zeroed destination
Raster with the correct size
and number of bands. |
WritableRaster |
filter(Raster src,
WritableRaster dst)
Transforms the
Raster using the matrix specified in the
constructor. |
Rectangle2D |
getBounds2D(Raster src)
Returns the bounding box of the transformed destination.
|
float[][] |
getMatrix()
Returns a copy of the linear combination matrix.
|
Point2D |
getPoint2D(Point2D srcPt,
Point2D dstPt)
Returns the location of the corresponding destination point given a
point in the source
Raster. |
RenderingHints |
getRenderingHints()
Returns the rendering hints for this operation.
|
public BandCombineOp(float[][] matrix,
RenderingHints hints)
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.
matrix - The matrix to use for the band combine operation.hints - The RenderingHints object for this operation.
Not currently used so it can be null.public final float[][] getMatrix()
public WritableRaster filter(Raster src, WritableRaster dst)
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.
filter in interface RasterOpsrc - The Raster to be filtered.dst - The Raster in which to store the results
of the filter operation.Raster.IllegalArgumentException - If the number of bands in the
source or destination is incompatible with the matrix.public final Rectangle2D getBounds2D(Raster src)
IllegalArgumentException may be thrown if the number of
bands in the source is incompatible with the matrix. See
the class comments for more details.getBounds2D in interface RasterOpsrc - The Raster to be filtered.Rectangle2D representing the destination
image's bounding box.IllegalArgumentException - If the number of bands in the source
is incompatible with the matrix.public WritableRaster createCompatibleDestRaster(Raster src)
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.createCompatibleDestRaster in interface RasterOpsrc - The Raster to be filtered.Raster.public final Point2D getPoint2D(Point2D srcPt, Point2D dstPt)
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.getPoint2D in interface RasterOpsrcPt - The Point2D that represents the point in
the source RasterdstPt - The Point2D in which to store the result.Point2D in the destination image that
corresponds to the specified point in the source image.public final RenderingHints getRenderingHints()
getRenderingHints in interface RasterOpRenderingHints object associated with this
operation. Returns null if no hints have been set. Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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