java.awt.image
Class ConvolveOp
- BufferedImageOp, RasterOp
Convolution filter.
ConvolveOp convolves the source image with a Kernel to generate a
destination image. This involves multiplying each pixel and its neighbors
with elements in the kernel to compute a new pixel.
Each band in a Raster is convolved and copied to the destination Raster.
For BufferedImages, convolution is applied to all components. Color
conversion will be applied if needed.
Note that this filter ignores whether the source or destination is alpha
premultiplied. The reference spec states that data will be premultiplied
prior to convolving and divided back out afterwards (if needed), but testing
has shown that this is not the case with their implementation.
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
EDGE_NO_OP
public static final int EDGE_NO_OP
Edge pixels are copied from the source.
EDGE_ZERO_FILL
public static final int EDGE_ZERO_FILL
Edge pixels are set to 0.
ConvolveOp
public ConvolveOp(Kernel kernel)
Construct a ConvolveOp.
The edge condition defaults to EDGE_ZERO_FILL.
kernel - The kernel to convolve with.
ConvolveOp
public ConvolveOp(Kernel kernel,
int edgeCondition,
RenderingHints hints) Construct a ConvolveOp.
The edge condition specifies that pixels outside the area that can be
filtered are either set to 0 or copied from the source image.
kernel - The kernel to convolve with.edgeCondition - Either EDGE_ZERO_FILL or EDGE_NO_OP.hints - Rendering hints for color conversion, or null.
filter
public final BufferedImage filter(BufferedImage src,
BufferedImage dst) Converts the source image using the kernel specified in the
constructor. The resulting image is stored in the destination image if one
is provided; otherwise a new BufferedImage is created and returned.
The source and destination BufferedImage (if one is supplied) must have
the same dimensions.
- filter in interface BufferedImageOp
src - The source image.dst - The destination image.
filter
public final WritableRaster filter(Raster src,
WritableRaster dest) Converts the source raster using the kernel specified in the constructor.
The resulting raster is stored in the destination raster if one is
provided; otherwise a new WritableRaster is created and returned.
If the convolved value for a sample is outside the range of [0-255], it
will be clipped.
The source and destination raster (if one is supplied) cannot be the same,
and must also have the same dimensions.
- filter in interface RasterOp
src - The source raster.dest - The destination raster.
getEdgeCondition
public int getEdgeCondition()
Get the edge condition for this Op.
getKernel
public final Kernel getKernel()
Returns (a clone of) the convolution kernel.
getPoint2D
public final Point2D getPoint2D(Point2D src,
Point2D dst) Returns the corresponding destination point for a source point. Because
this is not a geometric operation, the destination and source points will
be identical.
- getPoint2D in interface BufferedImageOp
- getPoint2D in interface RasterOp
src - The source point.dst - The transformed destination point.
- The transformed destination point.
ConvolveOp.java --
Copyright (C) 2004, 2005, 2006, Free Software Foundation -- ConvolveOp
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