--- a/gnv-artifacts/src/main/java/de/intevation/gnv/raster/KernelFilter.java	Tue Apr 06 13:07:11 2010 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/raster/KernelFilter.java	Tue Apr 06 16:53:43 2010 +0000
@@ -5,6 +5,7 @@
 import org.w3c.dom.Element;
 
 /**
+ * An implemenation of raster filters based on given kernels.
  * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
  */
 public class KernelFilter
@@ -12,15 +13,33 @@
 {
     private static Logger log = Logger.getLogger(KernelFilter.class);
 
+    /**
+     *  Implemens a factory which produces KernelFilters with Gauss kernels.
+     */
     public static class GaussFactory
     implements          Filter.Factory
     {
+        /**
+         * Default sigma of Gauss kernel: {@value}
+         */
         public static final double DEFAULT_SIGMA  = 1.0d;
+        /**
+         * Default radius of Gauss kernel: {@value}
+         */
         public static final int    DEFAULT_RADIUS = 5;
 
+        /**
+         * Configured sigma.
+         */
         protected double sigma;
+        /**
+         * Configured radius.
+         */
         protected int    radius;
 
+        /**
+         * Default constructor.
+         */
         public GaussFactory() {
             sigma  = DEFAULT_SIGMA;
             radius = DEFAULT_RADIUS;
@@ -54,11 +73,21 @@
         }
     } // class GaussFactory
 
+    /**
+     * The kernel used by this filter.
+     */
     protected Raster.Kernel kernel;
 
+    /**
+     * Default constructor.
+     */
     public KernelFilter() {
     }
 
+    /**
+     * Constructor to create a filter with a given kernel.
+     * @param kernel The kernel to be used.
+     */
     public KernelFilter(Raster.Kernel kernel) {
         this.kernel = kernel;
     }