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java.lang.Objectjavax.media.jai.PlanarImage
javax.media.jai.OpImage
javax.media.jai.PointOpImage
javax.media.jai.ColormapOpImage
it.geosolutions.jaiext.lookup.LookupOpImage
public class LookupOpImage
The LookupOpImage class performs the lookup operation on an image with integral data type. This operation consist of passing the input pixels through a lookupTable(an array) of all the JAI data types. The output pixels are calculated from the table values by simply taking the array value associated to the selected index indicated by the input pixel. The table and source data type can be different, and the destination image will have the table data type. Even the band number can be different, in this case the destination image number will depend from the source and table band numbers. If the destination sample model is not the same as that of the table, another one is created from the table. A ROI object passed to the constructor is taken into account by passing to the table the informations extracted from it; an eventual No Data Range is passed to table if present. If No Data or ROI are used, then the destination No Data value is passed to the table. The image calculation is performed by calling the computeRect() method that selects an image tile, a raster containing Roi data if Roi RasterAccessor is used, and then these parameters are passed to the table that executes the lookup operation.
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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LookupOpImage(RenderedImage source,
javax.media.jai.ImageLayout layout,
Map configuration,
LookupTable lookupTable,
double destinationNoData,
javax.media.jai.ROI roi,
Range noData,
boolean useRoiAccessor)
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Method Summary | |
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protected void |
computeRect(Raster[] sources,
WritableRaster dest,
Rectangle destRect)
Performs the table lookup operation within the specified bounds. |
protected void |
transformColormap(byte[][] colormap)
Transform the colormap via the lookup table. |
Methods inherited from class javax.media.jai.ColormapOpImage |
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initializeColormapOperation, isColormapOperation |
Methods inherited from class javax.media.jai.PointOpImage |
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computeTile, dispose, 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 |
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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 LookupOpImage(RenderedImage source, javax.media.jai.ImageLayout layout, Map configuration, LookupTable lookupTable, double destinationNoData, javax.media.jai.ROI roi, Range noData, boolean useRoiAccessor)
Method Detail |
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protected void computeRect(Raster[] sources, WritableRaster dest, Rectangle destRect)
computeRect
in class javax.media.jai.OpImage
protected void transformColormap(byte[][] colormap)
transformColormap
in class javax.media.jai.ColormapOpImage
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