Mercurial > hg > digilib-old
annotate common/src/main/java/digilib/image/ImageLoaderDocuImage.java @ 1026:01ea28b6fe11
commit sliders, not yet functional
| author | hertzhaft |
|---|---|
| date | Wed, 07 Mar 2012 16:19:50 +0100 |
| parents | 172079f9a398 |
| children | 4e368c85cce4 |
| rev | line source |
|---|---|
| 1 | 1 /* ImageLoaderDocuImage -- Image class implementation using JDK 1.4 ImageLoader |
| 2 | |
| 279 | 3 Digital Image Library servlet components |
| 1 | 4 |
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5 Copyright (C) 2002 - 2011 Robert Casties (robcast@mail.berlios.de) |
| 1 | 6 |
| 279 | 7 This program is free software; you can redistribute it and/or modify it |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 Please read license.txt for the full details. A copy of the GPL | |
| 13 may be found at http://www.gnu.org/copyleft/lgpl.html | |
| 1 | 14 |
| 279 | 15 You should have received a copy of the GNU General Public License |
| 16 along with this program; if not, write to the Free Software | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 */ | |
| 1 | 19 |
| 20 package digilib.image; | |
| 21 | |
| 496 | 22 import java.awt.Image; |
| 85 | 23 import java.awt.Rectangle; |
| 207 | 24 import java.awt.RenderingHints; |
| 829 | 25 import java.awt.color.ColorSpace; |
| 73 | 26 import java.awt.geom.AffineTransform; |
| 101 | 27 import java.awt.geom.Rectangle2D; |
| 73 | 28 import java.awt.image.AffineTransformOp; |
| 860 | 29 import java.awt.image.BandCombineOp; |
| 73 | 30 import java.awt.image.BufferedImage; |
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31 import java.awt.image.ByteLookupTable; |
| 829 | 32 import java.awt.image.ColorConvertOp; |
| 838 | 33 import java.awt.image.ColorModel; |
| 144 | 34 import java.awt.image.ConvolveOp; |
| 864 | 35 import java.awt.image.IndexColorModel; |
| 144 | 36 import java.awt.image.Kernel; |
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37 import java.awt.image.LookupOp; |
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38 import java.awt.image.LookupTable; |
| 85 | 39 import java.awt.image.RescaleOp; |
| 73 | 40 import java.io.IOException; |
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41 import java.io.OutputStream; |
| 89 | 42 import java.io.RandomAccessFile; |
| 464 | 43 import java.util.Arrays; |
| 85 | 44 import java.util.Iterator; |
| 1 | 45 |
| 352 | 46 import javax.imageio.IIOImage; |
| 73 | 47 import javax.imageio.ImageIO; |
| 85 | 48 import javax.imageio.ImageReadParam; |
| 49 import javax.imageio.ImageReader; | |
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50 import javax.imageio.ImageTypeSpecifier; |
| 352 | 51 import javax.imageio.ImageWriteParam; |
| 52 import javax.imageio.ImageWriter; | |
| 220 | 53 import javax.imageio.stream.FileImageInputStream; |
| 85 | 54 import javax.imageio.stream.ImageInputStream; |
| 352 | 55 import javax.imageio.stream.ImageOutputStream; |
| 1 | 56 |
| 207 | 57 import digilib.io.FileOpException; |
| 464 | 58 import digilib.io.FileOps; |
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59 import digilib.io.ImageInput; |
| 596 | 60 import digilib.util.ImageSize; |
| 1 | 61 |
| 73 | 62 /** Implementation of DocuImage using the ImageLoader API of Java 1.4 and Java2D. */ |
| 564 | 63 public class ImageLoaderDocuImage extends ImageInfoDocuImage { |
| 590 | 64 |
| 86 | 65 /** image object */ |
| 66 protected BufferedImage img; | |
| 570 | 67 |
| 906 | 68 /** the reader object */ |
| 69 protected ImageReader reader = null; | |
| 70 | |
| 71 /** try to reuse reader object */ | |
| 72 public boolean reuseReader = false; | |
| 73 | |
| 86 | 74 /** interpolation type */ |
| 838 | 75 protected RenderingHints renderHint = null; |
| 279 | 76 |
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77 /** convolution kernels for blur() */ |
| 590 | 78 protected static Kernel[] convolutionKernels = { |
| 79 null, | |
| 80 new Kernel(1, 1, new float[] {1f}), | |
| 81 new Kernel(2, 2, new float[] {0.25f, 0.25f, 0.25f, 0.25f}), | |
| 82 new Kernel(3, 3, new float[] {1f/9f, 1f/9f, 1f/9f, 1f/9f, 1f/9f, 1f/9f, 1f/9f, 1f/9f, 1f/9f}) | |
| 83 }; | |
| 279 | 84 |
| 854 | 85 /* lookup tables for inverting images (byte) */ |
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86 protected static LookupTable invertSingleByteTable; |
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87 protected static LookupTable invertRgbaByteTable; |
| 854 | 88 protected static boolean needsInvertRgba = false; |
| 860 | 89 /* RescaleOp for contrast/brightness operation */ |
| 854 | 90 protected static boolean needsRescaleRgba = false; |
| 865 | 91 /* lookup table for false-color */ |
| 860 | 92 protected static LookupTable mapBgrByteTable; |
| 865 | 93 protected static boolean needsMapBgr = false; |
| 854 | 94 |
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95 static { |
| 864 | 96 /* |
| 97 * create static lookup tables | |
| 98 */ | |
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99 byte[] invertByte = new byte[256]; |
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100 byte[] orderedByte = new byte[256]; |
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101 byte[] nullByte = new byte[256]; |
| 860 | 102 byte[] mapR = new byte[256]; |
| 103 byte[] mapG = new byte[256]; | |
| 104 byte[] mapB = new byte[256]; | |
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105 for (int i = 0; i < 256; ++i) { |
| 860 | 106 // counting down |
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107 invertByte[i] = (byte) (256 - i); |
| 860 | 108 // counting up |
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109 orderedByte[i] = (byte) i; |
| 860 | 110 // constant 0 |
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111 nullByte[i] = 0; |
| 860 | 112 // three overlapping slopes |
| 113 if (i < 64) { | |
| 114 mapR[i] = 0; | |
| 115 mapG[i] = (byte) (4 * i); | |
| 116 mapB[i] = (byte) 255; | |
| 117 } else if (i >= 64 && i < 192) { | |
| 118 mapR[i] = (byte) (2 * (i - 64)); | |
| 119 mapG[i] = (byte) 255; | |
| 120 mapB[i] = (byte) (255 - 2 * (i - 64)); | |
| 121 } else { | |
| 122 mapR[i] = (byte) 255; | |
| 861 | 123 mapG[i] = (byte) (255 - (4 * (i - 192))); |
| 860 | 124 mapB[i] = 0; |
| 125 } | |
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126 } |
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127 // should(!) work for all color models |
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128 invertSingleByteTable = new ByteLookupTable(0, invertByte); |
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129 // but doesn't work with alpha channel on all platforms |
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130 String ver = System.getProperty("java.version"); |
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131 String os = System.getProperty("os.name"); |
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132 logger.debug("os="+os+" ver="+ver); |
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133 if (os.startsWith("Linux") && ver.startsWith("1.6")) { |
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134 // GRAB(WTF?) works in Linux JDK1.6 with transparency |
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135 invertRgbaByteTable = new ByteLookupTable(0, new byte[][] { |
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136 invertByte, invertByte, orderedByte, invertByte}); |
| 854 | 137 needsInvertRgba = true; |
| 138 needsRescaleRgba = true; | |
| 865 | 139 needsMapBgr = true; |
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140 } else { |
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141 invertRgbaByteTable = invertSingleByteTable; |
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142 } |
| 860 | 143 // this hopefully works for all |
| 865 | 144 mapBgrByteTable = new ByteLookupTable(0, new byte[][] { |
| 860 | 145 mapR, mapG, mapB}); |
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146 } |
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147 |
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148 /** the size of the current image */ |
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149 protected ImageSize imageSize; |
| 590 | 150 |
| 151 | |
| 85 | 152 /* loadSubimage is supported. */ |
| 153 public boolean isSubimageSupported() { | |
| 154 return true; | |
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155 } |
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156 |
| 85 | 157 public void setQuality(int qual) { |
| 158 quality = qual; | |
| 207 | 159 renderHint = new RenderingHints(null); |
| 352 | 160 // hint.put(RenderingHints.KEY_ANTIALIASING, |
| 279 | 161 // RenderingHints.VALUE_ANTIALIAS_OFF); |
| 85 | 162 // setup interpolation quality |
| 163 if (qual > 0) { | |
| 181 | 164 logger.debug("quality q1"); |
| 279 | 165 renderHint.put(RenderingHints.KEY_INTERPOLATION, |
| 166 RenderingHints.VALUE_INTERPOLATION_BICUBIC); | |
| 85 | 167 } else { |
| 181 | 168 logger.debug("quality q0"); |
| 279 | 169 renderHint.put(RenderingHints.KEY_INTERPOLATION, |
| 170 RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR); | |
| 85 | 171 } |
| 172 } | |
| 86 | 173 |
| 570 | 174 /* returns the size of the current image */ |
| 175 public ImageSize getSize() { | |
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176 if (imageSize == null) { |
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177 int h = 0; |
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178 int w = 0; |
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179 try { |
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180 if (img == null) { |
| 906 | 181 reader = getReader(input); |
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182 // get size from ImageReader |
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183 h = reader.getHeight(0); |
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184 w = reader.getWidth(0); |
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185 } else { |
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186 // get size from image |
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187 h = img.getHeight(); |
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188 w = img.getWidth(); |
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189 } |
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190 imageSize = new ImageSize(w, h); |
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191 } catch (IOException e) { |
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192 logger.debug("error in getSize:", e); |
| 570 | 193 } |
| 194 } | |
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195 return imageSize; |
| 570 | 196 } |
| 1 | 197 |
| 464 | 198 /* returns a list of supported image formats */ |
| 531 | 199 public Iterator<String> getSupportedFormats() { |
| 464 | 200 String[] formats = ImageIO.getReaderFormatNames(); |
| 201 return Arrays.asList(formats).iterator(); | |
| 202 } | |
| 203 | |
| 588 | 204 /* Check image size and type and store in ImageInput */ |
| 205 public ImageInput identify(ImageInput input) throws IOException { | |
| 906 | 206 ImageInput ii = null; |
| 207 if (!reuseReader) { | |
| 208 // try parent method first | |
| 209 ii = super.identify(input); | |
| 210 if (ii != null) { | |
| 211 return ii; | |
| 212 } | |
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213 } |
| 588 | 214 logger.debug("identifying (ImageIO) " + input); |
| 590 | 215 try { |
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216 /* |
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217 * try ImageReader |
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218 */ |
| 590 | 219 reader = getReader(input); |
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220 // set size |
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221 ImageSize d = new ImageSize(reader.getWidth(0), reader.getHeight(0)); |
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222 input.setSize(d); |
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223 // set mime type |
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224 if (input.getMimetype() == null) { |
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225 if (input.hasFile()) { |
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226 String t = FileOps.mimeForFile(input.getFile()); |
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227 input.setMimetype(t); |
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228 } else { |
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229 // FIXME: is format name a mime type??? |
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230 String t = reader.getFormatName(); |
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231 input.setMimetype(t); |
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232 } |
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233 } |
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234 return input; |
| 590 | 235 } catch (FileOpException e) { |
| 236 // maybe just our class doesn't know what to do | |
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237 logger.error("ImageLoaderDocuimage unable to identify:", e); |
| 590 | 238 return null; |
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239 } finally { |
| 906 | 240 if (!reuseReader && reader != null) { |
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241 reader.dispose(); |
| 588 | 242 } |
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243 } |
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244 } |
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245 |
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246 /* load image file */ |
| 588 | 247 public void loadImage(ImageInput ii) throws FileOpException { |
| 248 logger.debug("loadImage: " + ii); | |
| 249 this.input = ii; | |
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250 try { |
| 588 | 251 if (ii.hasImageInputStream()) { |
| 252 img = ImageIO.read(ii.getImageInputStream()); | |
| 253 } else if (ii.hasFile()) { | |
| 254 img = ImageIO.read(ii.getFile()); | |
| 255 } | |
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256 } catch (IOException e) { |
| 906 | 257 throw new FileOpException("Error reading image!", e); |
| 258 } | |
| 259 if (img == null) { | |
| 260 throw new FileOpException("Unable to read image!"); | |
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261 } |
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262 } |
| 1 | 263 |
| 279 | 264 /** |
| 265 * Get an ImageReader for the image file. | |
| 266 * | |
| 267 * @return | |
| 268 */ | |
| 587 | 269 public ImageReader getReader(ImageInput input) throws IOException { |
| 270 logger.debug("get ImageReader for " + input); | |
| 906 | 271 if (reuseReader && reader != null) { |
| 272 logger.debug("reuseing ImageReader"); | |
| 273 return reader; | |
| 274 } | |
| 587 | 275 ImageInputStream istream = null; |
| 276 if (input.hasImageInputStream()) { | |
| 906 | 277 // ImageInputStream input |
| 587 | 278 istream = input.getImageInputStream(); |
| 279 } else if (input.hasFile()) { | |
| 280 // file only input | |
| 281 RandomAccessFile rf = new RandomAccessFile(input.getFile(), "r"); | |
| 282 istream = new FileImageInputStream(rf); | |
| 283 } else { | |
| 284 throw new FileOpException("Unable to get data from ImageInput"); | |
| 148 | 285 } |
| 565 | 286 Iterator<ImageReader> readers; |
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287 String mt = null; |
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288 if (input.hasMimetype()) { |
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289 // check hasMimetype first or we might get into a loop |
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290 mt = input.getMimetype(); |
| 821 | 291 } else { |
| 292 // try file extension | |
| 293 mt = FileOps.mimeForFile(input.getFile()); | |
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294 } |
| 565 | 295 if (mt == null) { |
| 296 logger.debug("No mime-type. Trying automagic."); | |
| 297 readers = ImageIO.getImageReaders(istream); | |
| 298 } else { | |
| 299 logger.debug("File type:" + mt); | |
| 300 readers = ImageIO.getImageReadersByMIMEType(mt); | |
| 301 } | |
| 279 | 302 if (!readers.hasNext()) { |
| 565 | 303 throw new FileOpException("Can't find Reader to load File!"); |
| 279 | 304 } |
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305 ImageReader reader = readers.next(); |
| 149 | 306 /* are there more readers? */ |
| 207 | 307 logger.debug("ImageIO: this reader: " + reader.getClass()); |
| 564 | 308 /* while (readers.hasNext()) { |
| 207 | 309 logger.debug("ImageIO: next reader: " + readers.next().getClass()); |
| 564 | 310 } */ |
| 89 | 311 reader.setInput(istream); |
| 279 | 312 return reader; |
| 85 | 313 } |
| 314 | |
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315 /* Load an image file into the Object. */ |
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316 public void loadSubimage(ImageInput ii, Rectangle region, int prescale) |
| 279 | 317 throws FileOpException { |
| 207 | 318 logger.debug("loadSubimage"); |
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319 this.input = ii; |
| 906 | 320 //ImageReader reader = null; |
| 85 | 321 try { |
| 906 | 322 reader = getReader(ii); |
| 85 | 323 // set up reader parameters |
| 324 ImageReadParam readParam = reader.getDefaultReadParam(); | |
| 325 readParam.setSourceRegion(region); | |
| 220 | 326 if (prescale > 1) { |
| 327 readParam.setSourceSubsampling(prescale, prescale, 0, 0); | |
| 328 } | |
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329 // try to restrict target color space to sRGB |
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330 for (Iterator<ImageTypeSpecifier> i = reader.getImageTypes(0); i.hasNext(); ) { |
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331 ImageTypeSpecifier type = (ImageTypeSpecifier) i.next(); |
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332 ColorModel cm = type.getColorModel(); |
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333 ColorSpace cs = cm.getColorSpace(); |
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334 //logger.debug("loadSubimage: possible color model:"+cm+" color space:"+cs); |
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335 if (cs.isCS_sRGB()) { |
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336 logger.debug("loadSubimage: substituted sRGB destination type "+type); |
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337 readParam.setDestinationType(type); |
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338 //break; |
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339 } |
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340 } |
| 85 | 341 // read image |
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342 logger.debug("loadSubimage: loading.."); |
| 85 | 343 img = reader.read(0, readParam); |
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344 logger.debug("loadSubimage: loaded"); |
| 912 | 345 // invalidate image size |
| 346 imageSize = null; | |
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347 // downconvert highcolor images |
| 865 | 348 if (img.getColorModel().getComponentSize(0) > 8) { |
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349 logger.debug("loadSubimage: converting to 8bit"); |
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350 int type = BufferedImage.TYPE_INT_RGB; |
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351 if (img.getColorModel().hasAlpha()) { |
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352 type = BufferedImage.TYPE_INT_ARGB; |
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353 } |
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354 BufferedImage dest = new BufferedImage(img.getWidth(), img.getHeight(), type); |
| 865 | 355 dest.createGraphics().drawImage(img, null, 0, 0); |
| 356 img = dest; | |
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357 } |
| 85 | 358 } catch (IOException e) { |
| 906 | 359 throw new FileOpException("Unable to load File!", e); |
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360 } finally { |
| 906 | 361 if (!reuseReader && reader != null) { |
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362 reader.dispose(); |
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363 } |
| 85 | 364 } |
| 365 } | |
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366 |
| 86 | 367 /* write image of type mt to Stream */ |
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368 public void writeImage(String mt, OutputStream ostream) |
| 906 | 369 throws ImageOpException, FileOpException { |
| 207 | 370 logger.debug("writeImage"); |
| 353 | 371 // setup output |
| 372 ImageWriter writer = null; | |
| 373 ImageOutputStream imgout = null; | |
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374 try { |
| 353 | 375 imgout = ImageIO.createImageOutputStream(ostream); |
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376 if (mt == "image/jpeg") { |
| 352 | 377 /* |
| 378 * JPEG doesn't do transparency so we have to convert any RGBA | |
| 864 | 379 * image to RGB or we the client will think its CMYK :-( *Java2D BUG* |
| 352 | 380 */ |
| 381 if (img.getColorModel().hasAlpha()) { | |
| 382 logger.debug("BARF: JPEG with transparency!!"); | |
| 864 | 383 BufferedImage rgbImg = new BufferedImage(img.getWidth(), |
| 384 img.getHeight(), BufferedImage.TYPE_INT_RGB); | |
| 385 rgbImg.createGraphics().drawImage(img, null, 0, 0); | |
| 386 img = rgbImg; | |
| 352 | 387 } |
| 864 | 388 writer = ImageIO.getImageWritersByFormatName("jpeg").next(); |
| 352 | 389 if (writer == null) { |
| 570 | 390 throw new ImageOpException("Unable to get JPEG writer"); |
| 352 | 391 } |
| 392 ImageWriteParam param = writer.getDefaultWriteParam(); | |
| 393 if (quality > 1) { | |
| 394 // change JPEG compression quality | |
| 353 | 395 param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); |
| 352 | 396 param.setCompressionQuality(0.9f); |
| 397 } | |
| 398 writer.setOutput(imgout); | |
| 399 // render output | |
| 864 | 400 logger.debug("writing JPEG"); |
| 352 | 401 writer.write(null, new IIOImage(img, null, null), param); |
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402 } else if (mt == "image/png") { |
| 352 | 403 // render output |
| 864 | 404 writer = ImageIO.getImageWritersByFormatName("png").next(); |
| 352 | 405 if (writer == null) { |
| 570 | 406 throw new ImageOpException("Unable to get PNG writer"); |
| 352 | 407 } |
| 408 writer.setOutput(imgout); | |
| 864 | 409 logger.debug("writing PNG"); |
| 352 | 410 writer.write(img); |
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411 } else { |
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412 // unknown mime type |
| 570 | 413 throw new ImageOpException("Unknown mime type: " + mt); |
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414 } |
| 140 | 415 |
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416 } catch (IOException e) { |
| 570 | 417 logger.error("Error writing image:", e); |
| 906 | 418 throw new FileOpException("Error writing image!", e); |
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419 } |
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420 // TODO: should we: finally { writer.dispose(); } |
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421 } |
| 1 | 422 |
| 864 | 423 public void scale(double scaleX, double scaleY) throws ImageOpException { |
| 424 logger.debug("scale: " + scaleX); | |
| 425 /* for downscaling in high quality the image is blurred first */ | |
| 426 if ((scaleX <= 0.5) && (quality > 1)) { | |
| 427 int bl = (int) Math.floor(1 / scaleX); | |
| 428 blur(bl); | |
| 429 } | |
| 430 /* then scaled */ | |
| 431 AffineTransformOp scaleOp = new AffineTransformOp( | |
| 432 AffineTransform.getScaleInstance(scaleX, scaleY), renderHint); | |
| 433 img = scaleOp.filter(img, null); | |
| 434 logger.debug("scaled to " + img.getWidth() + "x" + img.getHeight() | |
| 435 + " img=" + img); | |
| 912 | 436 // invalidate image size |
| 437 imageSize = null; | |
| 864 | 438 } |
| 1 | 439 |
| 144 | 440 public void blur(int radius) throws ImageOpException { |
| 181 | 441 logger.debug("blur: " + radius); |
| 144 | 442 // minimum radius is 2 |
| 443 int klen = Math.max(radius, 2); | |
| 590 | 444 Kernel blur = null; |
| 445 if (klen < convolutionKernels.length) { | |
| 863 | 446 // use precalculated Kernel |
| 590 | 447 blur = convolutionKernels[klen]; |
| 448 } else { | |
| 449 // calculate our own kernel | |
| 450 int ksize = klen * klen; | |
| 451 // kernel is constant 1/k | |
| 452 float f = 1f / ksize; | |
| 453 float[] kern = new float[ksize]; | |
| 454 for (int i = 0; i < ksize; ++i) { | |
| 455 kern[i] = f; | |
| 456 } | |
| 457 blur = new Kernel(klen, klen, kern); | |
| 144 | 458 } |
| 459 // blur with convolve operation | |
| 279 | 460 ConvolveOp blurOp = new ConvolveOp(blur, ConvolveOp.EDGE_NO_OP, |
| 461 renderHint); | |
| 863 | 462 BufferedImage dest = null; |
| 864 | 463 // blur needs explicit destination image type for 3BYTE_BGR *Java2D BUG* |
| 145 | 464 if (img.getType() == BufferedImage.TYPE_3BYTE_BGR) { |
| 864 | 465 logger.debug("blur: fixing destination image type"); |
| 466 dest = new BufferedImage(img.getWidth(), img.getHeight(), BufferedImage.TYPE_3BYTE_BGR); | |
| 863 | 467 } |
| 468 img = blurOp.filter(img, dest); | |
| 469 logger.debug("blurred: "+img); | |
| 144 | 470 } |
| 471 | |
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472 public void crop(int x_off, int y_off, int width, int height) |
| 279 | 473 throws ImageOpException { |
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474 // setup Crop |
| 857 | 475 img = img.getSubimage(x_off, y_off, width, height); |
| 476 logger.debug("CROP:" + img.getWidth() + "x" | |
| 477 + img.getHeight()); | |
| 912 | 478 // invalidate image size |
| 479 imageSize = null; | |
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480 } |
| 1 | 481 |
| 864 | 482 public void rotate(double angle) throws ImageOpException { |
| 483 logger.debug("rotate: " + angle); | |
| 484 // setup rotation | |
| 485 double rangle = Math.toRadians(angle); | |
| 486 // center of rotation is center of image | |
| 487 double w = img.getWidth(); | |
| 488 double h = img.getHeight(); | |
| 489 double x = (w / 2); | |
| 490 double y = (h / 2); | |
| 491 AffineTransform trafo = AffineTransform.getRotateInstance(rangle, x, y); | |
| 492 AffineTransformOp rotOp = new AffineTransformOp(trafo, renderHint); | |
| 493 // rotate bounds to see how much of the image would be off screen | |
| 494 Rectangle2D rotbounds = rotOp.getBounds2D(img); | |
| 495 double xoff = rotbounds.getX(); | |
| 496 double yoff = rotbounds.getY(); | |
| 497 if (Math.abs(xoff) > epsilon || Math.abs(yoff) > epsilon) { | |
| 498 // move image back on screen | |
| 499 logger.debug("move rotation: xoff="+xoff+" yoff="+yoff); | |
| 500 trafo.preConcatenate(AffineTransform.getTranslateInstance(-xoff, -yoff)); | |
| 501 rotOp = new AffineTransformOp(trafo, renderHint); | |
| 502 } | |
| 503 // transform image | |
| 504 img = rotOp.filter(img, null); | |
| 505 logger.debug("rotated: "+img); | |
| 912 | 506 // invalidate image size |
| 507 imageSize = null; | |
| 864 | 508 } |
| 509 | |
| 510 public void mirror(double angle) throws ImageOpException { | |
| 511 logger.debug("mirror: " + angle); | |
| 512 // setup mirror | |
| 513 double mx = 1; | |
| 514 double my = 1; | |
| 515 double tx = 0; | |
| 516 double ty = 0; | |
| 517 if (Math.abs(angle - 0) < epsilon) { // 0 degree | |
| 518 mx = -1; | |
| 519 tx = img.getWidth(); | |
| 520 } else if (Math.abs(angle - 90) < epsilon) { // 90 degree | |
| 521 my = -1; | |
| 522 ty = img.getHeight(); | |
| 523 } else if (Math.abs(angle - 180) < epsilon) { // 180 degree | |
| 524 mx = -1; | |
| 525 tx = img.getWidth(); | |
| 526 } else if (Math.abs(angle - 270) < epsilon) { // 270 degree | |
| 527 my = -1; | |
| 528 ty = img.getHeight(); | |
| 529 } else if (Math.abs(angle - 360) < epsilon) { // 360 degree | |
| 530 mx = -1; | |
| 531 tx = img.getWidth(); | |
| 532 } else { | |
| 533 logger.error("invalid mirror angle "+angle); | |
| 534 return; | |
| 535 } | |
| 536 AffineTransformOp mirOp = new AffineTransformOp(new AffineTransform(mx, | |
| 537 0, 0, my, tx, ty), renderHint); | |
| 538 img = mirOp.filter(img, null); | |
| 912 | 539 // invalidate image size |
| 540 imageSize = null; | |
| 864 | 541 } |
| 542 | |
| 543 public void enhance(float mult, float add) throws ImageOpException { | |
| 544 RescaleOp op = null; | |
| 545 logger.debug("enhance: img=" + img); | |
| 546 if (needsRescaleRgba) { | |
| 857 | 547 /* |
| 548 * Only one constant should work regardless of the number of bands | |
| 549 * according to the JDK spec. Doesn't work on JDK 1.4 for OSX and | |
| 550 * Linux (at least). | |
| 551 * | |
| 864 | 552 * The number of constants must match the number of bands in the |
| 553 * image. | |
| 554 */ | |
| 555 int ncol = img.getColorModel().getNumComponents(); | |
| 556 float[] dm = new float[ncol]; | |
| 557 float[] da = new float[ncol]; | |
| 558 for (int i = 0; i < ncol; i++) { | |
| 559 dm[i] = (float) mult; | |
| 560 da[i] = (float) add; | |
| 561 } | |
| 562 op = new RescaleOp(dm, da, null); | |
| 563 } else { | |
| 564 op = new RescaleOp(mult, add, renderHint); | |
| 565 } | |
| 566 op.filter(img, img); | |
| 567 } | |
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568 |
| 864 | 569 public void enhanceRGB(float[] rgbm, float[] rgba) throws ImageOpException { |
| 570 logger.debug("enhanceRGB: rgbm="+rgbm+" rgba="+rgba); | |
| 571 /* | |
| 572 * The number of constants must match the number of bands in the image. | |
| 573 * We do only 3 (RGB) bands. | |
| 574 */ | |
| 575 int ncol = img.getColorModel().getNumColorComponents(); | |
| 576 if ((ncol != 3) || (rgbm.length != 3) || (rgba.length != 3)) { | |
| 577 logger.error("enhanceRGB: unknown number of color bands or coefficients (" | |
| 578 + ncol + ")"); | |
| 579 return; | |
| 580 } | |
| 581 if (img.getColorModel().hasAlpha()) { | |
| 582 // add constant for alpha | |
| 583 rgbm = new float[] {rgbm[0], rgbm[1], rgbm[2], 1}; | |
| 584 rgba = new float[] {rgba[0], rgba[1], rgba[2], 0}; | |
| 585 } | |
| 586 RescaleOp scaleOp = new RescaleOp(rgbm, rgba, renderHint); | |
| 587 scaleOp.filter(img, img); | |
| 588 } | |
| 85 | 589 |
| 860 | 590 /* |
| 591 * (non-Javadoc) | |
| 592 * | |
| 593 * @see | |
| 594 * digilib.image.DocuImageImpl#colorOp(digilib.image.DocuImage.ColorOps) | |
| 595 */ | |
| 596 public void colorOp(ColorOp colop) throws ImageOpException { | |
| 597 if (colop == ColorOp.GRAYSCALE) { | |
| 598 /* | |
| 599 * convert image to grayscale | |
| 600 */ | |
| 601 logger.debug("Color op: grayscaling"); | |
| 602 ColorModel cm = img.getColorModel(); | |
| 864 | 603 if (cm.getNumColorComponents() < 3) { |
| 860 | 604 // grayscale already |
| 864 | 605 logger.debug("Color op: not grayscaling"); |
| 860 | 606 return; |
| 607 } | |
| 608 ColorConvertOp op = new ColorConvertOp( | |
| 609 ColorSpace.getInstance(ColorSpace.CS_GRAY), renderHint); | |
| 610 // let filter create new image | |
| 611 img = op.filter(img, null); | |
| 612 } else if (colop == ColorOp.NTSC_GRAY) { | |
| 613 /* | |
| 614 * convert image to grayscale NTSC-style: luminance = 0.2989*red + | |
| 615 * 0.5870*green + 0.1140*blue | |
| 616 */ | |
| 617 logger.debug("Color op: NTSC gray"); | |
| 864 | 618 logger.debug("img="+img); |
| 860 | 619 ColorModel cm = img.getColorModel(); |
| 864 | 620 if (cm.getNumColorComponents() < 3 || cm instanceof IndexColorModel) { |
| 621 // grayscale already or not possible | |
| 622 logger.debug("Color op: unable to NTSC gray"); | |
| 860 | 623 return; |
| 624 } | |
| 625 float[][] combineFn = new float[1][4]; | |
| 864 | 626 combineFn[0] = new float[] { 0.299f, 0.587f, 0.114f, 0f }; |
| 860 | 627 BandCombineOp op = new BandCombineOp(combineFn, renderHint); |
| 863 | 628 // BandCombineOp only works on Rasters so we create a |
| 860 | 629 // new image and use its Raster |
| 630 BufferedImage dest = new BufferedImage(img.getWidth(), | |
| 631 img.getHeight(), BufferedImage.TYPE_BYTE_GRAY); | |
| 632 op.filter(img.getRaster(), dest.getRaster()); | |
| 633 img = dest; | |
| 634 } else if (colop == ColorOp.INVERT) { | |
| 635 /* | |
| 636 * invert colors i.e. invert every channel | |
| 637 */ | |
| 638 logger.debug("Color op: inverting"); | |
| 639 LookupTable invtbl = null; | |
| 640 ColorModel cm = img.getColorModel(); | |
| 864 | 641 if (cm instanceof IndexColorModel) { |
| 642 // invert not possible | |
| 643 // TODO: should we convert? | |
| 644 logger.debug("Color op: unable to invert"); | |
| 645 return; | |
| 646 } | |
| 860 | 647 if (needsInvertRgba && cm.hasAlpha()) { |
| 864 | 648 // fix for some cases |
| 860 | 649 invtbl = invertRgbaByteTable; |
| 650 } else { | |
| 651 invtbl = invertSingleByteTable; | |
| 652 } | |
| 653 LookupOp op = new LookupOp(invtbl, renderHint); | |
| 865 | 654 logger.debug("colop: image=" + img); |
| 860 | 655 op.filter(img, img); |
| 656 } else if (colop == ColorOp.MAP_GRAY_BGR) { | |
| 657 /* | |
| 658 * false color image from grayscale (0: blue, 128: green, 255: red) | |
| 659 */ | |
| 660 logger.debug("Color op: map_gray_bgr"); | |
| 661 // convert to grayscale | |
| 662 ColorConvertOp grayOp = new ColorConvertOp( | |
| 663 ColorSpace.getInstance(ColorSpace.CS_GRAY), renderHint); | |
| 864 | 664 // create new 3-channel image |
| 865 | 665 int destType = BufferedImage.TYPE_INT_RGB; |
| 666 if (needsMapBgr) { | |
| 667 // special case for broken Java2Ds | |
| 668 destType = BufferedImage.TYPE_3BYTE_BGR; | |
| 669 } | |
| 860 | 670 BufferedImage dest = new BufferedImage(img.getWidth(), |
| 865 | 671 img.getHeight(), destType); |
| 860 | 672 img = grayOp.filter(img, dest); |
| 673 logger.debug("map_gray: image=" + img); | |
| 674 // convert to false color | |
| 675 LookupOp mapOp = new LookupOp(mapBgrByteTable, renderHint); | |
| 676 mapOp.filter(img, img); | |
| 677 logger.debug("mapped image=" + img); | |
| 678 } | |
| 679 } | |
| 829 | 680 |
| 207 | 681 public void dispose() { |
| 906 | 682 if (reader != null) { |
| 683 reader.dispose(); | |
| 684 } | |
|
819
a23c4c15a6a8
clean up possible resource leaks. better behaviour with unknown image types.
robcast
parents:
801
diff
changeset
|
685 // is this necessary? |
| 148 | 686 img = null; |
| 687 } | |
| 688 | |
| 533 | 689 public Image getAwtImage(){ |
| 496 | 690 return (Image) img; |
| 691 } | |
| 692 | |
| 693 | |
| 1 | 694 } |