Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/KernelFilter.java @ 779:b1f5f2a8840f
Ordered imports. Removed needless imports. Removed empty headers.
gnv-artifacts/trunk@854 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 29 Mar 2010 08:51:20 +0000 |
parents | 31a12ff53f99 |
children | c4156275c1e1 |
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1 package de.intevation.gnv.raster; |
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2 |
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3 import org.apache.log4j.Logger; |
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4 |
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5 import org.w3c.dom.Element; |
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6 |
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7 /** |
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8 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) |
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9 */ |
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10 public class KernelFilter |
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11 implements Filter |
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12 { |
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13 private static Logger log = Logger.getLogger(KernelFilter.class); |
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14 |
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15 public static class GaussFactory |
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16 implements Filter.Factory |
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17 { |
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18 public static final double DEFAULT_SIGMA = 1.0d; |
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19 public static final int DEFAULT_RADIUS = 5; |
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20 |
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21 protected double sigma; |
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22 protected int radius; |
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23 |
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24 public GaussFactory() { |
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25 sigma = DEFAULT_SIGMA; |
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26 radius = DEFAULT_RADIUS; |
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27 } |
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28 |
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29 public void init(Element element) { |
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30 String s = element.getAttribute("sigma"); |
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31 String r = element.getAttribute("radius"); |
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32 |
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33 if ((s = s.trim()).length() > 0) { |
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34 try { |
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35 sigma = Math.abs(Double.parseDouble(s)); |
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36 } |
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37 catch (NumberFormatException nfe) { |
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38 log.warn("gauss sigma '" + s + "' not a valid float value."); |
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39 } |
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40 } |
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41 |
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42 if ((r = r.trim()).length() > 0) { |
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43 try { |
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44 radius = Math.min(3, Math.abs(Integer.parseInt(r))); |
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45 } |
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46 catch (NumberFormatException nfe) { |
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47 log.warn("gauss radius '" + r + "' not a valid integer value."); |
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48 } |
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49 } |
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50 } |
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51 |
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52 public Filter create() { |
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53 return new KernelFilter(Raster.Kernel.createGauss(sigma, radius)); |
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54 } |
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55 } // class GaussFactory |
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56 |
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57 protected Raster.Kernel kernel; |
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58 |
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59 public KernelFilter() { |
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60 } |
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61 |
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62 public KernelFilter(Raster.Kernel kernel) { |
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63 this.kernel = kernel; |
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64 } |
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65 |
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66 public Raster filter(Raster raster) { |
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67 return raster.create(kernel); |
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68 } |
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69 } |
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70 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |