Mercurial > hg > digilib-old

comparison common-imagej/src/main/java/digilib/image/ImageJ1DocuImage.java @ 960:b2d97b842612

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moved DocuImage implementations with non-standard toolkits (JAI, ImgeJ) into separate Maven modules. default build uses jai-imageio (now only one additional JAR in webapp!).
author robcast
date Wed, 25 Jan 2012 15:13:06 +0100
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959:f197e7760154 960:b2d97b842612
1 /**
2 *
3 */
4 package digilib.image;
5
6 import ij.IJ;
7 import ij.ImagePlus;
8 import ij.plugin.JpegWriter;
9 import ij.plugin.PNG_Writer;
10 import ij.process.ImageProcessor;
11
12 import java.io.File;
13 import java.io.FileInputStream;
14 import java.io.IOException;
15 import java.io.OutputStream;
16 import java.util.Arrays;
17 import java.util.Iterator;
18
19 import digilib.io.FileOpException;
20 import digilib.io.FileOps;
21 import digilib.io.ImageInput;
22 import digilib.util.ImageSize;
23
24 /** Implementation of DocuImage using ImageJ version 1.
25 *
26 * @author casties
27 *
28 */
29 public class ImageJ1DocuImage extends ImageInfoDocuImage {
30
31 protected ImagePlus img;
32 protected ImageProcessor proc;
33
34 /* returns a list of supported image formats */
35 public Iterator<String> getSupportedFormats() {
36 String[] formats = new String[] {"JPG","PNG","TIFF"};
37 return Arrays.asList(formats).iterator();
38 }
39
40 /* Check image size and type and store in ImageInput */
41 public ImageInput identify(ImageInput input) throws IOException {
42 // try parent method first
43 ImageInput ii = super.identify(input);
44 if (ii != null) {
45 return ii;
46 }
47 logger.debug("identifying (ImageJ1) " + input);
48 String path = input.getFile().getAbsolutePath();
49 img = IJ.openImage(path);
50 // set size
51 ImageSize d = new ImageSize(img.getWidth(), img.getHeight());
52 input.setSize(d);
53 // set mime type
54 if (input.getMimetype() == null) {
55 String t = FileOps.mimeForFile(input.getFile());
56 input.setMimetype(t);
57 }
58 return input;
59 }
60
61 /* (non-Javadoc)
62 * @see digilib.image.DocuImageImpl#loadImage(digilib.io.ImageInput)
63 */
64 @Override
65 public void loadImage(ImageInput ii) throws FileOpException {
66 this.input = ii;
67 String path = ii.getFile().getAbsolutePath();
68 img = IJ.openImage(path);
69 proc = img.getProcessor();
70 }
71
72 /* (non-Javadoc)
73 * @see digilib.image.DocuImageImpl#crop(int, int, int, int)
74 */
75 @Override
76 public void crop(int xoff, int yoff, int width, int height)
77 throws ImageOpException {
78 proc.setRoi(xoff, yoff, width, height);
79 ImageProcessor croppedProc = proc.crop();
80 proc = croppedProc;
81 }
82
83 /* (non-Javadoc)
84 * @see digilib.image.DocuImageImpl#scale(double, double)
85 */
86 @Override
87 public void scale(double scaleX, double scaleY) throws ImageOpException {
88 int newWidth = (int) Math.round(proc.getWidth() * scaleX);
89 int newHeight = (int) Math.round(proc.getHeight() * scaleY);
90 ImageProcessor scaledProc = proc.resize(newWidth, newHeight, false);
91 proc = scaledProc;
92 }
93
94 /* (non-Javadoc)
95 * @see digilib.image.DocuImageImpl#writeImage(java.lang.String, java.io.OutputStream)
96 */
97 @Override
98 public void writeImage(String mt, OutputStream ostream)
99 throws ImageOpException, FileOpException {
100 File outFile;
101 String filext = ".jpg";
102 if (mt.equals("image/png")) {
103 filext = ".png";
104 }
105 try {
106 outFile = File.createTempFile("imgj_temp", filext);
107 } catch (IOException e) {
108 throw new FileOpException(e.toString());
109 }
110 // save image to file
111 logger.debug("writeImage: mt="+mt);
112 if (mt.equals("image/png")) {
113 PNG_Writer writer = new PNG_Writer();
114 try {
115 img = new ImagePlus("Image", proc);
116 writer.writeImage(img, outFile.getAbsolutePath(), 0);
117 } catch (Exception e) {
118 // TODO Auto-generated catch block
119 e.printStackTrace();
120 }
121 } else {
122 img = new ImagePlus("Image", proc);
123 JpegWriter.save(img, outFile.getAbsolutePath(), 70);
124 }
125 // now send file
126 FileInputStream inFile = null;
127 try {
128 inFile = new FileInputStream(outFile);
129 byte dataBuffer[] = new byte[4096];
130 int len;
131 while ((len = inFile.read(dataBuffer)) != -1) {
132 // copy out file
133 ostream.write(dataBuffer, 0, len);
134 }
135 } catch (IOException e) {
136 throw new FileOpException(e.toString());
137 } finally {
138 try {
139 if (inFile != null) {
140 inFile.close();
141 }
142 } catch (IOException e) {
143 // nothing to do
144 }
145 }
146 }
147
148 }