convolveop.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Apr 27 23:34:04 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class ConvolveOp</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/ConvolveOp.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../java/awt/image/ComponentSampleModel.html"><B>PREV CLASS</B></A> <A HREF="../../../java/awt/image/CropImageFilter.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="ConvolveOp.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">java.awt.image</FONT><BR>Class ConvolveOp</H2><PRE><A HREF="../../../java/lang/Object.html">java.lang.Object</A> | +--<B>java.awt.image.ConvolveOp</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../java/awt/image/BufferedImageOp.html">BufferedImageOp</A>, <A HREF="../../../java/awt/image/RasterOp.html">RasterOp</A></DD></DL><HR><DL><DT>public class <B>ConvolveOp</B><DT>extends <A HREF="../../../java/lang/Object.html">Object</A><DT>implements <A HREF="../../../java/awt/image/BufferedImageOp.html">BufferedImageOp</A>, <A HREF="../../../java/awt/image/RasterOp.html">RasterOp</A></DL><P>This class implements a convolution from the source to the destination. Convolution using a convolution kernel is a spatial operation that computes the output pixel from an input pixel by multiplying the kernel with the surround of the input pixel. This allows the output pixel to be affected by the immediate neighborhood in a way that can be mathematically specified with a kernel.<p> This class operates with BufferedImage data in which color components are premultiplied with the alpha component. If the Source BufferedImage has an alpha component, and the color components are not premultiplied with the alpha component, then the data are premultiplied before being convolved. If the Destination has color components which are not premultiplied, then alpha is divided out before storing into the Destination (if alpha is 0, the color components are set to 0). If the Destination has no alpha component, then the resulting alpha is discarded after first dividing it out of the color components. <p> Rasters are treated as having no alpha channel. If the above treatment of the alpha channel in BufferedImages is not desired, it may be avoided by getting the Raster of a source BufferedImage and using the filter method of this class which works with Rasters. <p> If a RenderingHints object is specified in the constructor, the color rendering hint and the dithering hint may be used when color conversion is required.<p> Note that the Source and the Destination may not be the same object.<P><DL><DT><B>See Also: </B><DD><A HREF="../../../java/awt/image/Kernel.html"><CODE>Kernel</CODE></A>, <A HREF="../../../java/awt/RenderingHints.html#KEY_COLOR_RENDERING"><CODE>RenderingHints.KEY_COLOR_RENDERING</CODE></A>, <A HREF="../../../java/awt/RenderingHints.html#KEY_DITHERING"><CODE>RenderingHints.KEY_DITHERING</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#EDGE_NO_OP">EDGE_NO_OP</A></B></CODE><BR> Pixels at the edge of the source image are copied to the corresponding pixels in the destination without modification.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#EDGE_ZERO_FILL">EDGE_ZERO_FILL</A></B></CODE><BR> Pixels at the edge of the destination image are set to zero.</TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#ConvolveOp(java.awt.image.Kernel)">ConvolveOp</A></B>(<A HREF="../../../java/awt/image/Kernel.html">Kernel</A> kernel)</CODE><BR> Constructs a ConvolveOp given a Kernel.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#ConvolveOp(java.awt.image.Kernel, int, java.awt.RenderingHints)">ConvolveOp</A></B>(<A HREF="../../../java/awt/image/Kernel.html">Kernel</A> kernel, int edgeCondition, <A HREF="../../../java/awt/RenderingHints.html">RenderingHints</A> hints)</CODE><BR> Constructs a ConvolveOp given a Kernel, an edge condition, and a RenderingHints object (which may be null).</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/image/BufferedImage.html">BufferedImage</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#createCompatibleDestImage(java.awt.image.BufferedImage, java.awt.image.ColorModel)">createCompatibleDestImage</A></B>(<A HREF="../../../java/awt/image/BufferedImage.html">BufferedImage</A> src, <A HREF="../../../java/awt/image/ColorModel.html">ColorModel</A> destCM)</CODE><BR> Creates a zeroed destination image with the correct size and number of bands.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/image/WritableRaster.html">WritableRaster</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#createCompatibleDestRaster(java.awt.image.Raster)">createCompatibleDestRaster</A></B>(<A HREF="../../../java/awt/image/Raster.html">Raster</A> src)</CODE><BR> Creates a zeroed destination Raster with the correct size and number of bands, given this source.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/image/BufferedImage.html">BufferedImage</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#filter(java.awt.image.BufferedImage, java.awt.image.BufferedImage)">filter</A></B>(<A HREF="../../../java/awt/image/BufferedImage.html">BufferedImage</A> src, <A HREF="../../../java/awt/image/BufferedImage.html">BufferedImage</A> dst)</CODE><BR> Performs a convolution on BufferedImages.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/image/WritableRaster.html">WritableRaster</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#filter(java.awt.image.Raster, java.awt.image.WritableRaster)">filter</A></B>(<A HREF="../../../java/awt/image/Raster.html">Raster</A> src, <A HREF="../../../java/awt/image/WritableRaster.html">WritableRaster</A> dst)</CODE><BR> Performs a convolution on Rasters.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/geom/Rectangle2D.html">Rectangle2D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#getBounds2D(java.awt.image.BufferedImage)">getBounds2D</A></B>(<A HREF="../../../java/awt/image/BufferedImage.html">BufferedImage</A> src)</CODE><BR> Returns the bounding box of the filtered destination image.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/geom/Rectangle2D.html">Rectangle2D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#getBounds2D(java.awt.image.Raster)">getBounds2D</A></B>(<A HREF="../../../java/awt/image/Raster.html">Raster</A> src)</CODE><BR> Returns the bounding box of the filtered destination Raster.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#getEdgeCondition()">getEdgeCondition</A></B>()</CODE><BR> Returns the edge condition.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/image/Kernel.html">Kernel</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#getKernel()">getKernel</A></B>()</CODE><BR> Returns the Kernel.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/geom/Point2D.html">Point2D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#getPoint2D(java.awt.geom.Point2D, java.awt.geom.Point2D)">getPoint2D</A></B>(<A HREF="../../../java/awt/geom/Point2D.html">Point2D</A> srcPt, <A HREF="../../../java/awt/geom/Point2D.html">Point2D</A> dstPt)</CODE><BR> Returns the location of the destination point given a point in the source.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../java/awt/RenderingHints.html">RenderingHints</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../java/awt/image/ConvolveOp.html#getRenderingHints()">getRenderingHints</A></B>()</CODE><BR> Returns the rendering hints for this op.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.<A HREF="../../../java/lang/Object.html">Object</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../java/lang/Object.html#clone()">clone</A>, <A HREF="../../../java/lang/Object.html#equals(java.lang.Object)">equals</A>, <A HREF="../../../java/lang/Object.html#finalize()">finalize</A>, <A HREF="../../../java/lang/Object.html#getClass()">getClass</A>, <A HREF="../../../java/lang/Object.html#hashCode()">hashCode</A>, <A HREF="../../../java/lang/Object.html#notify()">notify</A>, <A HREF="../../../java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="../../../java/lang/Object.html#toString()">toString</A>, <A HREF="../../../java/lang/Object.html#wait()">wait</A>, <A HREF="../../../java/lang/Object.html#wait(long)">wait</A>, <A HREF="../../../java/lang/Object.html#wait(long, int)">wait</A></CODE></TD></TR></TABLE> <P><!-- ============ FIELD 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