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annotate common-jai/src/main/java/digilib/image/JAIDocuImage.java @ 1110:ffda96c2fde0

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author hertzhaft
date Sun, 28 Oct 2012 15:10:41 +0100
parents b2d97b842612
children
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b2d97b842612 moved DocuImage implementations with non-standard toolkits (JAI, ImgeJ) into separate Maven modules.
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1 /* JAIDocuImage -- Image class implementation using JAI (Java Advanced Imaging)
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2
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3 Digital Image Library servlet components
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4
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5 Copyright (C) 2001, 2002, 2003 Robert Casties (robcast@mail.berlios.de)
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2 of the License, or (at your
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10 option) any later version.
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11
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12 Please read license.txt for the full details. A copy of the GPL
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13 may be found at http://www.gnu.org/copyleft/lgpl.html
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 */
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20
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21 package digilib.image;
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22
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23 import java.awt.Rectangle;
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24 import java.awt.RenderingHints;
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25 import java.awt.image.RenderedImage;
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26 import java.awt.image.renderable.ParameterBlock;
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27 import java.io.IOException;
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28 import java.io.OutputStream;
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29 import java.util.ArrayList;
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30 import java.util.Enumeration;
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31 import java.util.Iterator;
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32 import java.util.List;
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33
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34 import javax.media.jai.BorderExtender;
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35 import javax.media.jai.Interpolation;
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36 import javax.media.jai.JAI;
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37 import javax.media.jai.KernelJAI;
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38 import javax.media.jai.ParameterBlockJAI;
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39 import javax.media.jai.RenderedOp;
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40 import javax.media.jai.operator.TransposeDescriptor;
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41 import javax.media.jai.operator.TransposeType;
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42
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43 import com.sun.media.jai.codec.ImageCodec;
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44
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45 import digilib.io.FileOpException;
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46 import digilib.io.FileOps;
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47 import digilib.io.ImageInput;
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48 import digilib.util.ImageSize;
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49
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50 /** A DocuImage implementation using Java Advanced Imaging Library. */
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51 /**
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52 * @author casties
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53 *
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54 */
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55 public class JAIDocuImage extends ImageInfoDocuImage {
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56
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57 protected RenderedImage img;
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58
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59 protected Interpolation interpol = null;
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60
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61 /*
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62 * static { // we could set our own tile cache size here TileCache tc =
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63 * JAI.createTileCache(100*1024*1024);
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64 * JAI.getDefaultInstance().setTileCache(tc); }
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65 */
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66
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67 public boolean isSubimageSupported() {
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68 return true;
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69 }
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70
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71 /*
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72 * Real setQuality implementation. Creates the correct Interpolation.
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73 */
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74 public void setQuality(int qual) {
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75 quality = qual;
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76 // setup interpolation quality
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77 if (qual > 1) {
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78 logger.debug("quality q2");
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79 interpol = Interpolation.getInstance(Interpolation.INTERP_BICUBIC);
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80 } else if (qual == 1) {
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81 logger.debug("quality q1");
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82 interpol = Interpolation.getInstance(Interpolation.INTERP_BILINEAR);
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83 } else {
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84 logger.debug("quality q0");
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85 interpol = Interpolation.getInstance(Interpolation.INTERP_NEAREST);
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86 }
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87 }
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88
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89 /* returns a list of supported image formats */
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90 @SuppressWarnings("unchecked") // ImageCodec.getCodecs() returns a naked Enumeration
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91 public Iterator<String> getSupportedFormats() {
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92 Enumeration<ImageCodec> codecs = ImageCodec.getCodecs();
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93 List<String> formats = new ArrayList<String>();
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94 for (ImageCodec codec = codecs.nextElement(); codecs.hasMoreElements(); codec = codecs
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95 .nextElement()) {
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96 logger.debug("known format:"+codec.getFormatName());
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97 formats.add(codec.getFormatName());
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98 }
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99 logger.debug("tilecachesize:"
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100 + JAI.getDefaultInstance().getTileCache().getMemoryCapacity());
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101 return formats.iterator();
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102 }
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103
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104 /* Check image size and type and store in ImageFile f */
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105 public ImageInput identify(ImageInput input) throws IOException {
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106 this.input = input;
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107 // try parent method first
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108 ImageInput imf = super.identify(input);
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109 if (imf != null) {
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110 return imf;
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111 }
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112 /*
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113 * try JAI
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114 */
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115 logger.debug("identifying (JAI) " + input);
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116 try {
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117 RenderedOp img = null;
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118 if (input.hasFile()) {
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119 String t = FileOps.mimeForFile(input.getFile());
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120 input.setMimetype(t);
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121 img = JAI.create("fileload", input.getFile().getAbsolutePath());
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122 } else if (input.hasInputStream()) {
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123 img = JAI.create("stream", input.getInputStream());
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124 // FIXME: where do we get the mimetype?
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125 } else {
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126 throw new FileOpException("unable to get data for image!");
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127 }
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128 ImageSize d = new ImageSize(img.getWidth(), img.getHeight());
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129 input.setSize(d);
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130 logger.debug("image size: " + d);
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131 return input;
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132 } catch (Exception e) {
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133 throw new FileOpException("ERROR: unable to identify image!");
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134 }
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135 }
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136
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137 /* Load an image file into the Object. */
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138 public void loadImage(ImageInput ii) throws FileOpException {
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139 this.input = ii;
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140 if (ii.hasFile()) {
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141 img = JAI.create("fileload", ii.getFile().getAbsolutePath());
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142 } else if (ii.hasInputStream()) {
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143 img = JAI.create("stream", ii.getInputStream());
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144 } else {
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145 throw new FileOpException("unable to get data for image!");
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146 }
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147 if (img == null) {
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148 throw new FileOpException("Unable to load File!");
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149 }
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150 }
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151
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152 /* Load an image file into the Object. */
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153 public void loadSubimage(ImageInput ii, Rectangle region, int subsample) throws FileOpException {
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154 logger.debug("loadSubimage");
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155 this.input = ii;
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156 if (ii.hasFile()) {
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157 img = JAI.create("fileload", ii.getFile().getAbsolutePath());
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158 } else if (ii.hasInputStream()) {
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159 img = JAI.create("stream", ii.getInputStream());
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160 } else {
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161 throw new FileOpException("unable to get data for image!");
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162 }
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163 if ((region.width < img.getWidth())
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164 || (region.height < img.getHeight())) {
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165 // setup Crop
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166 ParameterBlock cp = new ParameterBlock();
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167 cp.addSource(img);
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168 cp.add((float) region.x);
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169 cp.add((float) region.y);
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170 cp.add((float) region.width);
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171 cp.add((float) region.height);
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172 logger.debug("loadSubimage: crop");
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173 img = JAI.create("crop", cp);
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174 }
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175 if (subsample > 1) {
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176 float sc = 1f / subsample;
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177 ParameterBlockJAI sp = new ParameterBlockJAI("scale");
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178 sp.addSource(img);
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179 sp.setParameter("xScale", sc);
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180 sp.setParameter("yScale", sc);
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181 sp.setParameter("interpolation", Interpolation
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182 .getInstance(Interpolation.INTERP_NEAREST));
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183 // scale
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184 logger.debug("loadSubimage: scale");
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185 img = JAI.create("scale", sp);
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186 }
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187 }
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188
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189 /* Write the current image to an OutputStream. */
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190 public void writeImage(String mt, OutputStream ostream) throws ImageOpException, FileOpException {
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191 try {
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192 // setup output
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193 ParameterBlock pb3 = new ParameterBlock();
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194 pb3.addSource(img);
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195 pb3.add(ostream);
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196 if (mt == "image/jpeg") {
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197 pb3.add("JPEG");
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198 } else if (mt == "image/png") {
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199 pb3.add("PNG");
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200 } else {
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201 // unknown mime type
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202 throw new ImageOpException("Unknown mime type: " + mt);
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203 }
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204 // render output
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205 JAI.create("encode", pb3);
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206
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207 } catch (RuntimeException e) {
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208 // JAI likes to throw RuntimeExceptions
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209 throw new FileOpException("Error writing image: "+e);
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210 }
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211 }
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212
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213 /* returns the current image size
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214 * @see digilib.image.DocuImageImpl#getSize()
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215 */
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216 public ImageSize getSize() {
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217 ImageSize is = null;
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218 // TODO: do we want to cache imgSize?
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219 int h = 0;
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220 int w = 0;
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221 if (img != null) {
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222 // get size from image
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223 h = img.getHeight();
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224 w = img.getWidth();
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225 is = new ImageSize(w, h);
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226 }
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227 return is;
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228 }
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229
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230 /* scales the current image */
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231 public void scale(double scale, double scaleY) throws ImageOpException {
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232 logger.debug("scale");
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233 if ((scale < 1) && (img.getColorModel().getPixelSize() == 1)
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234 && (quality > 0)) {
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235 /*
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236 * "SubsampleBinaryToGray" for downscaling BW
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237 */
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238 scaleBinary((float) scale);
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239 } else if ((scale <= 0.5) && (quality > 1)) {
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240 /*
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241 * blur and "Scale" for downscaling color images
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242 */
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243 if ((scale <= 0.5) && (quality > 1)) {
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244 int bl = (int) Math.floor(1 / scale);
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245 // don't blur more than 3
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246 blur(Math.min(bl, 3));
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247 }
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248 scaleAll((float) scale);
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249 } else {
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250 /*
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251 * "Scale" for the rest
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252 */
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253 scaleAll((float) scale);
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254 }
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255
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256 // DEBUG
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257 logger.debug("SCALE: " + scale + " ->" + img.getWidth() + "x"
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258 + img.getHeight());
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259
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260 }
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261
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262 public void scaleAll(float scale) throws ImageOpException {
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263 RenderedImage scaledImg;
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264 // DEBUG
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265 logger.debug("scaleAll: " + scale);
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266 ParameterBlockJAI param = new ParameterBlockJAI("Scale");
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267 param.addSource(img);
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268 param.setParameter("xScale", scale);
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269 param.setParameter("yScale", scale);
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270 param.setParameter("interpolation", interpol);
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271 // hint with border extender
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272 RenderingHints hint = new RenderingHints(JAI.KEY_BORDER_EXTENDER,
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273 BorderExtender.createInstance(BorderExtender.BORDER_COPY));
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274 // scale
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275 scaledImg = JAI.create("Scale", param, hint);
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276
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277 if (scaledImg == null) {
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278 throw new ImageOpException("Unable to scale");
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279 }
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280 img = scaledImg;
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281 }
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282
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283 public void blur(int radius) throws ImageOpException {
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284 RenderedImage blurredImg;
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285 int klen = Math.max(radius, 2);
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286 logger.debug("blur: " + klen);
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287 int ksize = klen * klen;
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288 float f = 1f / ksize;
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289 float[] kern = new float[ksize];
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290 for (int i = 0; i < ksize; i++) {
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291 kern[i] = f;
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292 }
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293 KernelJAI blur = new KernelJAI(klen, klen, kern);
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294 ParameterBlockJAI param = new ParameterBlockJAI("Convolve");
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295 param.addSource(img);
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296 param.setParameter("kernel", blur);
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297 // hint with border extender
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298 RenderingHints hint = new RenderingHints(JAI.KEY_BORDER_EXTENDER,
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299 BorderExtender.createInstance(BorderExtender.BORDER_COPY));
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300 blurredImg = JAI.create("Convolve", param, hint);
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301 if (blurredImg == null) {
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302 throw new ImageOpException("Unable to scale");
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303 }
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304 img = blurredImg;
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305 }
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306
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307 public void scaleBinary(float scale) throws ImageOpException {
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308 RenderedImage scaledImg;
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309 // DEBUG
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310 logger.debug("scaleBinary: " + scale);
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311 ParameterBlockJAI param = new ParameterBlockJAI("SubsampleBinaryToGray");
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312 param.addSource(img);
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313 param.setParameter("xScale", scale);
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314 param.setParameter("yScale", scale);
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315 // hint with border extender
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316 RenderingHints hint = new RenderingHints(JAI.KEY_BORDER_EXTENDER,
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317 BorderExtender.createInstance(BorderExtender.BORDER_COPY));
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318 // scale
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319 scaledImg = JAI.create("SubsampleBinaryToGray", param, hint);
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320 if (scaledImg == null) {
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321 throw new ImageOpException("Unable to scale");
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322 }
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323 img = scaledImg;
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324 }
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325
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326 /* crops the current image */
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327 public void crop(int x_off, int y_off, int width, int height)
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328 throws ImageOpException {
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329 // setup Crop
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330 ParameterBlock param = new ParameterBlock();
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331 param.addSource(img);
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332 param.add((float) x_off);
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333 param.add((float) y_off);
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334 param.add((float) width);
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335 param.add((float) height);
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336 RenderedImage croppedImg = JAI.create("crop", param);
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337
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338 logger.debug("CROP: " + x_off + "," + y_off + ", " + width + ","
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339 + height + " ->" + croppedImg.getWidth() + "x"
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340 + croppedImg.getHeight());
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341 img = croppedImg;
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342 }
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343
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344 /* rotates the current image */
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345 public void rotate(double angle) throws ImageOpException {
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346 RenderedImage rotImg;
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347 // convert degrees to radians
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348 double rangle = Math.toRadians(angle);
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349 double x = img.getWidth() / 2;
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350 double y = img.getHeight() / 2;
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351
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352 // optimize rotation by right angles
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353 TransposeType rotOp = null;
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354 if (Math.abs(angle - 0) < epsilon) {
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355 // 0 degree
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356 return;
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357 } else if (Math.abs(angle - 90) < epsilon) {
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358 // 90 degree
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359 rotOp = TransposeDescriptor.ROTATE_90;
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360 } else if (Math.abs(angle - 180) < epsilon) {
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361 // 180 degree
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362 rotOp = TransposeDescriptor.ROTATE_180;
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363 } else if (Math.abs(angle - 270) < epsilon) {
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364 // 270 degree
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365 rotOp = TransposeDescriptor.ROTATE_270;
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366 } else if (Math.abs(angle - 360) < epsilon) {
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367 // 360 degree
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368 return;
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369 }
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370 if (rotOp != null) {
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371 // use Transpose operation
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372 ParameterBlock pb = new ParameterBlock();
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373 pb.addSource(img);
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374 pb.add(rotOp);
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375 rotImg = JAI.create("transpose", pb);
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376 } else {
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377 // setup "normal" rotation
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378 ParameterBlock param = new ParameterBlock();
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379 param.addSource(img);
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380 param.add((float) x);
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381 param.add((float) y);
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382 param.add((float) rangle);
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383 param.add(interpol);
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384
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385 rotImg = JAI.create("rotate", param);
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386 }
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387
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388 logger.debug("ROTATE: " + x + "," + y + ", " + angle + " (" + rangle
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389 + ")" + " ->" + rotImg.getWidth() + "x" + rotImg.getHeight());
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390 img = rotImg;
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391 }
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392
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393 /*
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394 * mirrors the current image works only horizontal and vertical
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395 */
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396 public void mirror(double angle) throws ImageOpException {
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397 RenderedImage mirImg;
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398 // only mirroring by right angles
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399 TransposeType rotOp = null;
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400 if (Math.abs(angle) < epsilon) {
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401 // 0 degree
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402 rotOp = TransposeDescriptor.FLIP_HORIZONTAL;
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403 } else if (Math.abs(angle - 90) < epsilon) {
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404 // 90 degree
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405 rotOp = TransposeDescriptor.FLIP_VERTICAL;
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406 } else if (Math.abs(angle - 180) < epsilon) {
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407 // 180 degree
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408 rotOp = TransposeDescriptor.FLIP_HORIZONTAL;
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409 } else if (Math.abs(angle - 270) < epsilon) {
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410 // 270 degree
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411 rotOp = TransposeDescriptor.FLIP_VERTICAL;
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412 } else if (Math.abs(angle - 360) < epsilon) {
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413 // 360 degree
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414 rotOp = TransposeDescriptor.FLIP_HORIZONTAL;
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415 }
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416 // use Transpose operation
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417 ParameterBlock param = new ParameterBlock();
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418 param.addSource(img);
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419 param.add(rotOp);
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420 mirImg = JAI.create("transpose", param);
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421
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422 if (mirImg == null) {
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423 throw new ImageOpException("Unable to flip");
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424 }
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425 img = mirImg;
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426 }
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427
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428 /* contrast and brightness enhancement */
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429 public void enhance(float mult, float add) throws ImageOpException {
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430 RenderedImage enhImg;
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431 double[] ma = { mult };
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432 double[] aa = { add };
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433 // use Rescale operation
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434 ParameterBlock param = new ParameterBlock();
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435 param.addSource(img);
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436 param.add(ma);
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437 param.add(aa);
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438 enhImg = JAI.create("rescale", param);
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439
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440 logger.debug("ENHANCE: *" + mult + ", +" + add + " ->"
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441 + enhImg.getWidth() + "x" + enhImg.getHeight());
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442 // DEBUG
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443 img = enhImg;
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444 }
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445
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446 /*
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447 * (non-Javadoc)
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448 *
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449 * @see digilib.image.DocuImage#enhanceRGB(float[], float[])
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450 */
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451 public void enhanceRGB(float[] rgbm, float[] rgba) throws ImageOpException {
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452 RenderedImage enhImg;
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453 int nb = rgbm.length;
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454 double[] ma = new double[nb];
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455 double[] aa = new double[nb];
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456 for (int i = 0; i < nb; i++) {
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457 ma[i] = rgbm[i];
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458 aa[i] = rgba[i];
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459 }
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460 // use Rescale operation
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461 ParameterBlock param = new ParameterBlock();
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462 param.addSource(img);
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463 param.add(ma);
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464 param.add(aa);
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465 enhImg = JAI.create("rescale", param);
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466
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467 logger.debug("ENHANCE_RGB: *" + rgbm + ", +" + rgba + " ->"
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468 + enhImg.getWidth() + "x" + enhImg.getHeight());
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469 img = enhImg;
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470 }
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471
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472 /*
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473 * (non-Javadoc)
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474 *
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475 * @see digilib.image.DocuImage#dispose()
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476 */
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477 public void dispose() {
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478 img = null;
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479 }
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480
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481 }