org.geotools.image.jai
Class NodataFilter

java.lang.Object
  javax.media.jai.PlanarImage
      javax.media.jai.OpImage
          javax.media.jai.AreaOpImage
              org.geotools.image.jai.NodataFilter

All Implemented Interfaces:

javax.media.jai.ImageJAI, javax.media.jai.PropertyChangeEmitter, javax.media.jai.PropertySource, java.awt.image.RenderedImage, javax.media.jai.WritablePropertySource

public class NodataFilter

extends javax.media.jai.AreaOpImage

Replaces Double.NaN values by the weighted average of neighbors values. This operation use a box of × pixels centered on each value. The weighted average is then computed, ignoring all values. If the number of valid values is greater than , then the center is replaced by the computed average. Otherwise, the value is left unchanged.

Since:

2.1

Version:

$Id: NodataFilter.java 17672 2006-01-19 00:25:55Z desruisseaux $

Author:

Lionel Flahaut, Martin Desruisseaux

Field Summary

Fields inherited from class javax.media.jai.AreaOpImage

bottomPadding, extender, leftPadding, rightPadding, topPadding

Fields inherited from class javax.media.jai.OpImage

cache, cobbleSources, OP_COMPUTE_BOUND, OP_IO_BOUND, OP_NETWORK_BOUND, tileCacheMetric, tileRecycler

Fields inherited from class javax.media.jai.PlanarImage

colorModel, eventManager, height, minX, minY, properties, sampleModel, tileFactory, tileGridXOffset, tileGridYOffset, tileHeight, tileWidth, width

Constructor Summary

protected

NodataFilter(java.awt.image.RenderedImage source, javax.media.jai.ImageLayout layout, java.util.Map map, int padding, int validityThreshold) Constructs a new operation.

Method Summary

protected void

computeRect(javax.media.jai.PlanarImage[] sources, java.awt.image.WritableRaster dest, java.awt.Rectangle destRect) Computes a rectangle of outputs.

Methods inherited from class javax.media.jai.AreaOpImage

computeTile, getBorderExtender, getBottomPadding, getLeftPadding, getRightPadding, getTopPadding, mapDestRect, mapSourceRect

Methods inherited from class javax.media.jai.OpImage

addTileToCache, cancelTiles, computeRect, computesUniqueTiles, createTile, dispose, 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

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NodataFilter

protected NodataFilter(java.awt.image.RenderedImage source,
                       javax.media.jai.ImageLayout layout,
                       java.util.Map map,
                       int padding,
                       int validityThreshold)

Constructs a new operation.

Parameters:

source - The source image.

layout - The image layout.

map - The image properties and rendering hints.

padding - The number of pixel above, below, to the left and to the right of central pixel. The full box size is ×2+1.

validityThreshold - The minimal number of valid neighbors required in order to consider the average as valid.

Method Detail

computeRect

protected void computeRect(javax.media.jai.PlanarImage[] sources,
                           java.awt.image.WritableRaster dest,
                           java.awt.Rectangle destRect)

Computes a rectangle of outputs.