org.geotoolkit.image.jai
Class NodataFilter

Object
  PlanarImage
      OpImage
          AreaOpImage
              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 uses 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

Version:

3.00

Author:

Lionel Flahaut (IRD), Martin Desruisseaux (IRD)

Module:

coverage/geotk-coverage (download)

View source code for this class

Field Summary

static String

OPERATION_NAME The name of this operation in the JAI registry.

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

NodataFilter(RenderedImage source, ImageLayout layout, Map<?,?> configuration, int padding, int validityThreshold)
Constructs a new operation.

Method Summary

protected void	computeRect(PlanarImage[] sources, WritableRaster dest, Rectangle destRect) Computes a rectangle of outputs.
Vector<RenderedImage>	getSources() Returns the source images.

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, 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

Field Detail

OPERATION_NAME

public static final String OPERATION_NAME

The name of this operation in the JAI registry. This is "org.geotoolkit.NodataFilter".

See Also:

Constant Field Values

Constructor Detail

NodataFilter

public NodataFilter(RenderedImage source,
                    ImageLayout layout,
                    Map<?,?> configuration,
                    int padding,
                    int validityThreshold)

Constructs a new operation. While this constructor is public, it should usually not be invoked directly. You should use JAI factory methods instead.

Parameters:

source - The source image.

layout - The image layout.

configuration - 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

getSources

public Vector<RenderedImage> getSources()

Returns the source images.

Specified by:

getSources in interface RenderedImage

Overrides:

getSources in class PlanarImage

computeRect

protected void computeRect(PlanarImage[] sources,
                           WritableRaster dest,
                           Rectangle destRect)

Computes a rectangle of outputs.

Overrides:

computeRect in class OpImage

Parameters:

sources - The source images. Should be an array of length 1.

dest - The raster to be filled in.

destRect - The region within the raster to be filled.