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java.lang.Objectjavax.media.jai.PlanarImage
javax.media.jai.OpImage
javax.media.jai.PointOpImage
it.geosolutions.jaiext.rescale.RescaleOpImage
public class RescaleOpImage
This class is used for rescaling the source image pixels with the given scale and offset factors. At the instantiation time this class checks if the input parameters are suitable for the Rescale operation. If the image data type is Byte, the rescale operation on every pixel value is pre-calculated and stored inside a byte array and the rescaling is effectively a simple lookup operation. For the other data types the Rescale operation is performed at runtime. The rescale operation is executed for each tile independently. If input ROI or NoData values are founded, then they are not rescaled, but the input destination No Data value is returned.
Field Summary | |
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protected static javax.media.jai.BorderExtender |
ROI_EXTENDER
ROI extender |
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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RescaleOpImage(RenderedImage source,
javax.media.jai.ImageLayout layout,
Map configuration,
double[] valueScale,
double[] valueOffsets,
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)
Rescales to the pixel values within a specified rectangle. |
Methods inherited from class javax.media.jai.PointOpImage |
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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 |
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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 |
Field Detail |
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protected static final javax.media.jai.BorderExtender ROI_EXTENDER
Constructor Detail |
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public RescaleOpImage(RenderedImage source, javax.media.jai.ImageLayout layout, Map configuration, double[] valueScale, double[] valueOffsets, 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
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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