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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » com.sun.media.jai.opimage

Source Cross Reference Class Diagram Java Document (Java Doc)

javax.media.jai .ColormapOpImage

com.sun.media.jai.opimage .LogOpImage

LogOpImage

final class LogOpImage extends ColormapOpImage (Code)

An OpImage implementing the "Log" operation as described in javax.media.jai.operator.LogDescriptor.

This OpImage takes the natural logarithm of the pixel values of an image. The operation is done on a per-pixel, per-band basis.

For all integral data types, the log of 0 is set to 0. For signed integral data types (short and int), the log of a negative pixel value is set to -1.

For all floating point data types ((float and double), the log of 0 is set to -Infinity, and the log of a negative pixel value is set to NaN.
See Also:   javax.media.jai.operator.LogDescriptor
See Also:   LogCRIF
since:
   EA2

Constructor Summary
public	LogOpImage(RenderedImage source, Map config, ImageLayout layout) Constructor. The layout of the source is used as the fall-back for the layout of the destination.

Method Summary
protected void	computeRect(Raster[] sources, WritableRaster dest, Rectangle destRect) Finds the natural logarithm of the pixels within a specified rectangle.
protected void	transformColormap(byte[][] colormap) Transform the colormap according to the rescaling parameters.

Constructor Detail

LogOpImage
public LogOpImage(RenderedImage source, Map config, ImageLayout layout)(Code)
	Constructor. The layout of the source is used as the fall-back for the layout of the destination. Any layout parameters not specified in the `layout` argument are set to the same value as that of the source. Parameters: source - The source image. Parameters: layout - The destination image layout.

Method Detail

computeRect
protected void computeRect(Raster[] sources, WritableRaster dest, Rectangle destRect)(Code)
	Finds the natural logarithm of the pixels within a specified rectangle. Parameters: sources - Cobbled sources, guaranteed to provide all thesource data necessary for computing the rectangle. Parameters: dest - The tile containing the rectangle to be computed. Parameters: destRect - The rectangle within the tile to be computed.

transformColormap
protected void transformColormap(byte[][] colormap)(Code)
	Transform the colormap according to the rescaling parameters.

Methods inherited from javax.media.jai.ColormapOpImage

final protected void initializeColormapOperation()(Code)(Java Doc)
final protected boolean isColormapOperation()(Code)(Java Doc)
abstract protected void transformColormap(byte[][] colormap)(Code)(Java Doc)

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