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java.lang.Objectjavax.media.jai.PlanarImage
javax.media.jai.OpImage
javax.media.jai.PointOpImage
it.geosolutions.jaiext.algebra.AlgebraOpImage
public final class AlgebraOpImage
An OpImage
implementing the "Add" operation as described in javax.media.jai.operator.AddDescriptor
.
This OpImage
adds the pixel values of two source images on a per-band basis. In case the two source images have different number of
bands, the number of bands for the destination image is the smaller band number of the two source images. That is
dstNumBands = Math.min(src1NumBands, src2NumBands)
. In case the two source images have different data types, the data type for the
destination image is the higher data type of the two source images.
The value of the pixel (x, y) in the destination image is defined as:
for (b = 0; b < numBands; b++) { dst[y][x][b] = src1[y][x][b] + src2[y][x][b]; }
If the result of the addition overflows/underflows the maximum/minimum value supported by the destination image, then it will be clamped to the
maximum/minimum value respectively. The data type byte
is treated as unsigned, with maximum value as 255 and minimum value as 0.
AddDescriptor
,
AddCRIF
Field Summary |
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Fields inherited from class javax.media.jai.OpImage |
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cache, cobbleSources, OP_COMPUTE_BOUND, OP_IO_BOUND, OP_NETWORK_BOUND, tileCacheMetric, tileRecycler |
Fields inherited from class javax.media.jai.PlanarImage |
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colorModel, eventManager, height, minX, minY, properties, sampleModel, tileFactory, tileGridXOffset, tileGridYOffset, tileHeight, tileWidth, width |
Constructor Summary | |
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AlgebraOpImage(Map config,
javax.media.jai.ImageLayout layout,
AlgebraDescriptor.Operator op,
javax.media.jai.ROI srcROI,
Range noData,
double destinationNoData,
RenderedImage... sources)
Constructs an AddOpImage . |
Method Summary | |
---|---|
protected void |
computeRect(Raster[] sources,
WritableRaster dest,
Rectangle destRect)
Adds the pixel values of two source images within a specified rectangle. |
Methods inherited from class javax.media.jai.PointOpImage |
---|
computeTile, dispose, isColormapOperation, mapDestRect, mapSourceRect, permitInPlaceOperation |
Methods inherited from class javax.media.jai.OpImage |
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addTileToCache, cancelTiles, computeRect, computesUniqueTiles, createTile, getExpandedNumBands, getFormatTags, getOperationComputeType, getTile, getTileCache, getTileCacheMetric, getTileDependencies, getTileFromCache, getTileRecycler, getTiles, hasExtender, mapDestPoint, mapSourcePoint, prefetchTiles, queueTiles, recycleTile, setTileCache, vectorize, vectorize, vectorize |
Methods inherited from class javax.media.jai.PlanarImage |
---|
addPropertyChangeListener, addPropertyChangeListener, addSink, addSink, addSource, addTileComputationListener, copyData, copyData, copyExtendedData, createColorModel, createSnapshot, createWritableRaster, finalize, getAsBufferedImage, getAsBufferedImage, getBounds, getColorModel, getData, getData, getDefaultColorModel, getExtendedData, getGraphics, getHeight, getImageID, getMaxTileX, getMaxTileY, getMaxX, getMaxY, getMinTileX, getMinTileY, getMinX, getMinY, getNumBands, getNumSources, getNumXTiles, getNumYTiles, getProperties, getProperty, getPropertyClass, getPropertyNames, getPropertyNames, getSampleModel, getSinks, getSource, getSourceImage, getSourceObject, getSources, getSplits, getTileComputationListeners, getTileFactory, getTileGridXOffset, getTileGridYOffset, getTileHeight, getTileIndices, getTileRect, getTiles, getTileWidth, getWidth, overlapsMultipleTiles, removeProperty, removePropertyChangeListener, removePropertyChangeListener, removeSink, removeSink, removeSinks, removeSource, removeSources, removeTileComputationListener, setImageLayout, setProperties, setProperty, setSource, setSources, tileXToX, tileXToX, tileYToY, tileYToY, toString, wrapRenderedImage, XToTileX, XToTileX, YToTileY, YToTileY |
Methods inherited from class java.lang.Object |
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clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public AlgebraOpImage(Map config, javax.media.jai.ImageLayout layout, AlgebraDescriptor.Operator op, javax.media.jai.ROI srcROI, Range noData, double destinationNoData, RenderedImage... sources)
AddOpImage
.
The layout
parameter may optionally contains the tile grid layout, sample model, and/or color model. The image dimension is
determined by the intersection of the bounding boxes of the two source images.
The image layout of the first source image, source1
, is used as the fall-back for the image layout of the destination image. Any
layout parameters not specified in the layout
argument are set to the same value as that of source1
.
source1
- The first source image.source2
- The second source image.layout
- The destination image layout.useROIAccessor
- Method Detail |
---|
protected void computeRect(Raster[] sources, WritableRaster dest, Rectangle destRect)
computeRect
in class javax.media.jai.OpImage
sources
- Cobbled sources, guaranteed to provide all the source data necessary for computing the rectangle.dest
- The tile containing the rectangle to be computed.destRect
- The rectangle within the tile to be computed.
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