org.geotools.image.jai
Class NodataFilter

Object
  extended by PlanarImage
      extended by OpImage
          extended by AreaOpImage
              extended by NodataFilter
All Implemented Interfaces:
RenderedImage, ImageJAI, PropertyChangeEmitter, PropertySource, WritablePropertySource

public class NodataFilter
extends AreaOpImage

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

Since:
2.1
Author:
Lionel Flahaut (2ie Technologie, IRD), Martin Desruisseaux
Module:

Field Summary
 
Fields inherited from class AreaOpImage
bottomPadding, extender, leftPadding, rightPadding, topPadding
 
Fields inherited from class OpImage
cache, cobbleSources, OP_COMPUTE_BOUND, OP_IO_BOUND, OP_NETWORK_BOUND, tileCacheMetric, tileRecycler
 
Fields inherited from class PlanarImage
colorModel, eventManager, height, minX, minY, properties, sampleModel, tileFactory, tileGridXOffset, tileGridYOffset, tileHeight, tileWidth, width
 
Constructor Summary
protected NodataFilter(RenderedImage source, ImageLayout layout, Map map, int padding, int validityThreshold)
          Constructs a new operation.
 
Method Summary
protected  void computeRect(PlanarImage[] sources, WritableRaster dest, Rectangle destRect)
          Computes a rectangle of outputs.
 
Methods inherited from class AreaOpImage
computeTile, getBorderExtender, getBottomPadding, getLeftPadding, getRightPadding, getTopPadding, mapDestRect, mapSourceRect
 
Methods inherited from class 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 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 Object
clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

NodataFilter

protected NodataFilter(RenderedImage source,
                       ImageLayout layout,
                       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 NaN pixel. The full box size is padding×2+1.
validityThreshold - The minimal number of valid neighbors required in order to consider the average as valid.
Method Detail

computeRect

protected void computeRect(PlanarImage[] sources,
                           WritableRaster dest,
                           Rectangle destRect)
Computes a rectangle of outputs.

Overrides:
computeRect in class OpImage


Copyright © 1996-2009 Geotools. All Rights Reserved.