operationjai.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/Extrema.html" title="class in org.geotools.coverage.processing.operation">Extrema</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This operation simply wraps JAI Extrema operations described by
 <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/ExtremaDescriptor.html" title="class or interface in javax.media.jai.operator"><CODE>ExtremaDescriptor</CODE></A> inside a GeoTools operation in order to make it
 spatial-aware.
 
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/GradientMagnitude.html" title="class in org.geotools.coverage.processing.operation">GradientMagnitude</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Edge detector which computes the magnitude of the image gradient vector in two orthogonal
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/Histogram.html" title="class in org.geotools.coverage.processing.operation">Histogram</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;* This operation simply wraps JAI Extrema operations described by
 <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/HistogramDescriptor.html" title="class or interface in javax.media.jai.operator"><CODE>HistogramDescriptor</CODE></A> inside a GeoTools operation in order to make it
 spatial-aware.
 
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/Invert.html" title="class in org.geotools.coverage.processing.operation">Invert</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Inverts the sample values of a coverage. </TD>
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/Log.html" title="class in org.geotools.coverage.processing.operation">Log</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Takes the natural logarithm of the sample values of a coverage.

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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/MaxFilter.html" title="class in org.geotools.coverage.processing.operation">MaxFilter</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;For each position of the mask, replaces the center pixel by the maximum of the pixel
 values covered by the mask.

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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/MedianFilter.html" title="class in org.geotools.coverage.processing.operation">MedianFilter</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;For each position of the mask, replaces the center pixel by the median of the pixel
 values covered by the mask.

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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/MinFilter.html" title="class in org.geotools.coverage.processing.operation">MinFilter</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;For each position of the mask, replaces the center pixel by the minimum of the pixel
 values covered by the mask.

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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/MultiplyConst.html" title="class in org.geotools.coverage.processing.operation">MultiplyConst</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Multiplies every sample values of the source coverage by constants (one for each band).
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/NodataFilter.html" title="class in org.geotools.coverage.processing.operation">NodataFilter</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Replaces <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Float.html#NaN" title="class or interface in java.lang"><CODE>NaN</CODE></A> values by the weighted average of neighbors values. </TD>
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/Rescale.html" title="class in org.geotools.coverage.processing.operation">Rescale</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Maps the sample values of a coverage from one range to another range. </TD>
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/SubtractConst.html" title="class in org.geotools.coverage.processing.operation">SubtractConst</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Subtracts constants (one for each band) from every sample values of the source coverage.
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<CODE>&nbsp;class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/geotools/coverage/processing/operation/SubtractFromConst.html" title="class in org.geotools.coverage.processing.operation">SubtractFromConst</A></B></CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Subtracts every sample values of the source coverage from constants (one for each band).
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