package-summary.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

       <STRONG>JAI operator:</STRONG>&nbsp;<CODE>"<A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/ConvolveDescriptor.html" title="class or interface in javax.media.jai.operator">Convolve</A>"</CODE><BR>
       <STRONG>Parameters:</STRONG></P>
    <table border='3' cellpadding='6' bgcolor='F4F8FF'>
      <tr bgcolor='#B9DCFF'>
        <th>Name</th>
        <th>Class</th>
        <th>Default value</th>
        <th>Minimum value</th>
        <th>Maximum value</th>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="../../../../org/geotools/coverage/grid/GridCoverage2D.html" title="class in org.geotools.coverage.grid"><CODE>GridCoverage2D</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/KernelJAI.html" title="class or interface in javax.media.jai"><CODE>KernelJAI</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
    </table>
    <P><A HREF="#operation-list">Back to summary</A></P>






    <P>&nbsp;</P>
    <HR>
    <P>&nbsp;</P>
    <H2><A NAME="LaplaceType1Filter">LaplaceType1Filter</A></H2>
    <P ALIGN="justify">Perform a laplacian filter operation on a grid coverage.
    This is a high pass filter which highlights the edges having positive and
    negative brightness slopes. This filter mulitples the co-efficients in the
    tabe below with the corresponding grid data value in the kernel window.
    The new grid value will be calculated as the sum of
    <code>(grid value * co-efficient)</code> for each kernel cell divised by 9.</P>
    <TABLE border='1' cellpadding='6'>
      <TR align="center"> <TD>0</TD>  <TD>-1</TD>   <TD>0</TD></TR>
      <TR align="center"><TD>-1</TD>   <TD>4</TD>  <TD>-1</TD></TR>
      <TR align="center"> <TD>0</TD>  <TD>-1</TD>   <TD>0</TD></TR>
    </TABLE>
    <P><STRONG>Name:</STRONG>&nbsp;<CODE>"LaplaceType1Filter"</CODE><BR>
       <STRONG>JAI operator:</STRONG>&nbsp;<CODE>"<A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/ConvolveDescriptor.html" title="class or interface in javax.media.jai.operator">Convolve</A>"</CODE><BR>
       <STRONG>Parameters:</STRONG></P>
    <table border='3' cellpadding='6' bgcolor='F4F8FF'>
      <tr bgcolor='#B9DCFF'>
        <th>Name</th>
        <th>Class</th>
        <th>Default value</th>
        <th>Minimum value</th>
        <th>Maximum value</th>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="../../../../org/geotools/coverage/grid/GridCoverage2D.html" title="class in org.geotools.coverage.grid"><CODE>GridCoverage2D</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
    </table>
    <P><A HREF="#operation-list">Back to summary</A></P>






    <P>&nbsp;</P>
    <HR>
    <P>&nbsp;</P>
    <H2><A NAME="LaplaceType2Filter">LaplaceType2Filter</A></H2>
    <P ALIGN="justify">Perform a laplacian filter operation on a grid coverage.
    This is a high pass filter which highlights the edges having positive and
    negative brightness slopes. This filter mulitples the co-efficients in the
    tabe below with the corresponding grid data value in the kernel window.
    The new grid value will be calculated as the sum of
    <code>(grid value * co-efficient)</code> for each kernel cell divised by 9.</P>
    <TABLE border='1' cellpadding='6'>
      <TR align="center"><TD>-1</TD>  <TD>-1</TD>  <TD>-1</TD></TR>
      <TR align="center"><TD>-1</TD>   <TD>8</TD>  <TD>-1</TD></TR>
      <TR align="center"><TD>-1</TD>  <TD>-1</TD>  <TD>-1</TD></TR>
    </TABLE>
    <P><STRONG>Name:</STRONG>&nbsp;<CODE>"LaplaceType1Filter"</CODE><BR>
       <STRONG>JAI operator:</STRONG>&nbsp;<CODE>"<A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/ConvolveDescriptor.html" title="class or interface in javax.media.jai.operator">Convolve</A>"</CODE><BR>
       <STRONG>Parameters:</STRONG></P>
    <table border='3' cellpadding='6' bgcolor='F4F8FF'>
      <tr bgcolor='#B9DCFF'>
        <th>Name</th>
        <th>Class</th>
        <th>Default value</th>
        <th>Minimum value</th>
        <th>Maximum value</th>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="../../../../org/geotools/coverage/grid/GridCoverage2D.html" title="class in org.geotools.coverage.grid"><CODE>GridCoverage2D</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
    </table>
    <P><A HREF="#operation-list">Back to summary</A></P>






    <P>&nbsp;</P>
    <HR>
    <P>&nbsp;</P>
    <H2><A NAME="MaxFilter">MaxFilter</A></H2>
    <P ALIGN="justify">Non-linear filter which is useful for removing isolated
    lines or pixels while preserving the overall appearance of an image. The
    filter is implemented by moving a mask over the image. For each position
    of the mask, the center pixel is replaced by the max of the pixel values
    covered by the mask.
    There are several shapes possible for the mask, which are enumerated in the
    <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MaxFilterDescriptor.html" title="class or interface in javax.media.jai.operator">JAI documentation</A>.</P>

    <P><STRONG>Name:</STRONG>&nbsp;<CODE>"MaxFilter"</CODE><BR>
       <STRONG>JAI operator:</STRONG>&nbsp;<CODE>"<A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MaxFilterDescriptor.html" title="class or interface in javax.media.jai.operator">MaxFilter</A>"</CODE><BR>
       <STRONG>Parameters:</STRONG></P>
    <table border='3' cellpadding='6' bgcolor='F4F8FF'>
      <tr bgcolor='#B9DCFF'>
        <th>Name</th>
        <th>Class</th>
        <th>Default value</th>
        <th>Minimum value</th>
        <th>Maximum value</th>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="../../../../org/geotools/coverage/grid/GridCoverage2D.html" title="class in org.geotools.coverage.grid"><CODE>GridCoverage2D</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Integer.html" title="class or interface in java.lang"><CODE>Integer</CODE></A></td>
        <td align="center">3</td>
        <td align="center">1</td>
        <td align="center">N/A</td>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Integer.html" title="class or interface in java.lang"><CODE>Integer</CODE></A></td>
        <td align="center">3</td>
        <td align="center">1</td>
        <td align="center">N/A</td>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MaxFilterShape.html" title="class or interface in javax.media.jai.operator"><CODE>MaxFilterShape</CODE></A></td>
        <td><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MaxFilterDescriptor.html#MAX_MASK_SQUARE" title="class or interface in javax.media.jai.operator"><CODE>MaxFilterDescriptor.MAX_MASK_SQUARE</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
    </table>
    <P ALIGN="justify"><STRONG>Note:</STRONG> In current implementation,
    <code>Xsize</code> and <code>Ysize</code> must have the same value
    (i.e. rectangular shapes are not supported).</P>
    <P><A HREF="#operation-list">Back to summary</A></P>






    <P>&nbsp;</P>
    <HR>
    <P>&nbsp;</P>
    <H2><A NAME="MedianFilter">MedianFilter</A></H2>
    <P ALIGN="justify">Non-linear filter which is useful for removing isolated
    lines or pixels while preserving the overall appearance of an image. The
    filter is implemented by moving a mask over the image. For each position
    of the mask, the center pixel is replaced by the median of the pixel values
    covered by the mask. This filter results in a smoothing of the image values.
    There are several shapes possible for the mask, which are enumerated in the
    <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MedianFilterDescriptor.html" title="class or interface in javax.media.jai.operator">JAI documentation</A>.</P>

    <P><STRONG>Name:</STRONG>&nbsp;<CODE>"MedianFilter"</CODE><BR>
       <STRONG>JAI operator:</STRONG>&nbsp;<CODE>"<A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MedianFilterDescriptor.html" title="class or interface in javax.media.jai.operator">MedianFilter</A>"</CODE><BR>
       <STRONG>Parameters:</STRONG></P>
    <table border='3' cellpadding='6' bgcolor='F4F8FF'>
      <tr bgcolor='#B9DCFF'>
        <th>Name</th>
        <th>Class</th>
        <th>Default value</th>
        <th>Minimum value</th>
        <th>Maximum value</th>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="../../../../org/geotools/coverage/grid/GridCoverage2D.html" title="class in org.geotools.coverage.grid"><CODE>GridCoverage2D</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Integer.html" title="class or interface in java.lang"><CODE>Integer</CODE></A></td>
        <td align="center">3</td>
        <td align="center">1</td>
        <td align="center">N/A</td>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Integer.html" title="class or interface in java.lang"><CODE>Integer</CODE></A></td>
        <td align="center">3</td>
        <td align="center">1</td>
        <td align="center">N/A</td>
      </tr>
      <tr>
        <td></td>
        <td><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MedianFilterShape.html" title="class or interface in javax.media.jai.operator"><CODE>MedianFilterShape</CODE></A></td>
        <td><A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/MedianFilterDescriptor.html#MEDIAN_MASK_SQUARE" title="class or interface in javax.media.jai.operator"><CODE>MedianFilterDescriptor.MEDIAN_MASK_SQUARE</CODE></A></td>
        <td align="center">N/A</td>
        <td align="center">N/A</td>
      </tr>
    </table>
    <P ALIGN="justify"><STRONG>Note:</STRONG> In current implementation,
    <code>Xsize</code> and <code>Ysize</code> must have the same value