Mercurial > hg > digilib-old
annotate servlet/src/digilib/image/ImageWorker.java @ 693:e06822e74ffd jquery
I need my Hertziana connection
author | hertzhaft |
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date | Thu, 27 Jan 2011 00:38:36 +0100 |
parents | fd2ef7e46119 |
children | dad720e9b12b |
rev | line source |
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1 /** Worker (Callable) that renders an image. |
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2 * |
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3 */ |
557 | 4 package digilib.image; |
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5 |
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6 import java.awt.Rectangle; |
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7 import java.io.IOException; |
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8 import java.util.concurrent.Callable; |
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9 |
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10 import org.apache.log4j.Logger; |
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11 |
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12 import digilib.io.FileOpException; |
557 | 13 import digilib.servlet.DigilibConfiguration; |
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14 |
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15 /** Worker that renders an image. |
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16 * |
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17 * @author casties |
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18 * |
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19 */ |
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20 public class ImageWorker implements Callable<DocuImage> { |
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21 |
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22 |
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23 protected static Logger logger = Logger.getLogger(ImageWorker.class); |
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24 private DigilibConfiguration dlConfig; |
547 | 25 private ImageJobDescription jobinfo; |
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26 |
547 | 27 public ImageWorker(DigilibConfiguration dlConfig, ImageJobDescription jobinfo) { |
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28 super(); |
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29 this.dlConfig = dlConfig; |
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30 this.jobinfo = jobinfo; |
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31 } |
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32 |
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33 /** |
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34 * render and return the image |
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35 */ |
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36 public DocuImage call() throws FileOpException, IOException, ImageOpException { |
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37 |
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38 logger.debug("image worker starting"); |
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39 long startTime = System.currentTimeMillis(); |
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40 |
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41 /* crop and scale image */ |
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42 |
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43 // new DocuImage instance |
564 | 44 DocuImage docuImage = DigilibConfiguration.getDocuImageInstance(); |
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45 if (docuImage == null) { |
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46 throw new ImageOpException("Unable to load DocuImage class!"); |
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47 } |
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48 |
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49 // set interpolation quality |
565 | 50 docuImage.setQuality(jobinfo.getScaleQual()); |
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51 |
547 | 52 Rectangle loadRect = jobinfo.getOuterUserImgArea().getBounds(); |
53 float scaleXY = jobinfo.getScaleXY(); | |
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54 |
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55 // use subimage loading if possible |
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56 if (docuImage.isSubimageSupported()) { |
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57 logger.debug("Subimage: scale " + scaleXY + " = " + (1 / scaleXY)); |
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58 float subf = 1f; |
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59 float subsamp = 1f; |
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60 if (scaleXY < 1) { |
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61 subf = 1 / scaleXY; |
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62 // for higher quality reduce subsample factor by minSubsample |
565 | 63 if (jobinfo.getScaleQual() > 0) { |
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64 subsamp = (float) Math.max(Math.floor(subf / dlConfig.getAsFloat("subsample-minimum")), 1d); |
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65 } else { |
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66 subsamp = (float) Math.floor(subf); |
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67 } |
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68 scaleXY = subsamp / subf; |
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69 logger.debug("Using subsampling: " + subsamp + " rest " |
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70 + scaleXY); |
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71 } |
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72 |
547 | 73 docuImage.loadSubimage(jobinfo.getFileToLoad(), loadRect, (int) subsamp); |
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74 |
570 | 75 logger.debug("SUBSAMP: " + subsamp + " -> " + docuImage.getSize()); |
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76 |
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77 docuImage.scale(scaleXY, scaleXY); |
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78 |
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79 } else { |
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80 // else load and crop the whole file |
547 | 81 docuImage.loadImage(jobinfo.getFileToLoad()); |
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82 docuImage.crop((int) loadRect.getX(), (int) loadRect.getY(), |
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83 (int) loadRect.getWidth(), (int) loadRect.getHeight()); |
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84 |
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85 docuImage.scale(scaleXY, scaleXY); |
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86 } |
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87 |
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88 // mirror image |
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89 // operation mode: "hmir": mirror horizontally, "vmir": mirror |
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90 // vertically |
547 | 91 if (jobinfo.hasOption("hmir")) { |
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92 docuImage.mirror(0); |
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93 } |
547 | 94 if (jobinfo.hasOption("vmir")) { |
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95 docuImage.mirror(90); |
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96 } |
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97 |
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98 // rotate image |
547 | 99 if (jobinfo.getAsFloat("rot") != 0d) { |
100 docuImage.rotate(jobinfo.getAsFloat("rot")); | |
101 /* if (jobinfo.get_wholeRotArea()) { | |
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102 // crop to the inner bounding box |
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103 float xcrop = (float) (docuImage.getWidth() - jobinfo.get_innerUserImgArea().getWidth() |
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104 * scaleXY); |
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105 float ycrop = (float) (docuImage.getHeight() - jobinfo.get_innerUserImgArea().getHeight() |
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106 * scaleXY); |
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107 if ((xcrop > 0) || (ycrop > 0)) { |
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108 // only crop smaller |
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109 xcrop = (xcrop > 0) ? xcrop : 0; |
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110 ycrop = (ycrop > 0) ? ycrop : 0; |
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111 // crop image |
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112 docuImage.crop((int) (xcrop / 2), (int) (ycrop / 2), |
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113 (int) (docuImage.getWidth() - xcrop), |
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114 (int) (docuImage.getHeight() - ycrop)); |
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115 } |
547 | 116 } */ |
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117 |
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118 } |
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119 |
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120 // color modification |
547 | 121 float[] paramRGBM = jobinfo.getRGBM(); |
122 float[] paramRGBA = jobinfo.getRGBA(); | |
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123 if ((paramRGBM != null) || (paramRGBA != null)) { |
547 | 124 // make sure we actually have two arrays |
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125 if (paramRGBM == null) { |
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126 paramRGBM = new float[3]; |
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127 } |
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128 if (paramRGBA == null) { |
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129 paramRGBA = new float[3]; |
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130 } |
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131 // calculate "contrast" values (c=2^x) |
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132 float[] mult = new float[3]; |
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133 for (int i = 0; i < 3; i++) { |
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134 mult[i] = (float) Math.pow(2, (float) paramRGBM[i]); |
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135 } |
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136 docuImage.enhanceRGB(mult, paramRGBA); |
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137 } |
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138 |
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139 // contrast and brightness enhancement |
547 | 140 float paramCONT = jobinfo.getAsFloat("cont"); |
141 float paramBRGT = jobinfo.getAsFloat("brgt"); | |
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142 if ((paramCONT != 0f) || (paramBRGT != 0f)) { |
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143 float mult = (float) Math.pow(2, paramCONT); |
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144 docuImage.enhance(mult, paramBRGT); |
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145 } |
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146 |
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147 logger.debug("rendered in " + (System.currentTimeMillis() - startTime) + "ms"); |
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148 |
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149 return docuImage; |
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150 } |
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151 |
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152 } |