imageloader.java

基于MPEG 7 标准,符合未来语义网架构,很值得参考

                    int tagType = exifDirectory.getInt(currentTag.getTagType());
                    status.setText("Extracting EXIF: " + currentTag.getTagName());
                    debug(exifDirectory.getTagName(tagType) + ": " + exifDirectory.getString(tagType));
                    creationPanel.addKeyValuePair(currentTag.getTagName(), currentTag.getDescription());
                } catch (MetadataException e) {
                    System.err.println("Exception parsing tag .. " + e.toString());
                }
            }
            // ----------------------------
            // Reading IPTC
            // ----------------------------
            Directory iptcDirectory = metadata.getDirectory(IptcDirectory.class);
            tagIterator = iptcDirectory.getTagIterator();

            StringBuffer buff = new StringBuffer();
            if (iptcDirectory.containsTag(IptcDirectory.TAG_CAPTION)) {
                buff.append(iptcDirectory.getString(IptcDirectory.TAG_CAPTION) + "\n");
            }
            if (iptcDirectory.containsTag(IptcDirectory.TAG_SUPPLEMENTAL_CATEGORIES)) {
                buff.append(iptcDirectory.getString(IptcDirectory.TAG_SUPPLEMENTAL_CATEGORIES) + "\n");
            }
            if (iptcDirectory.containsTag(IptcDirectory.TAG_KEYWORDS)) {
                buff.append(iptcDirectory.getString(IptcDirectory.TAG_KEYWORDS) + "\n");
            }

            if (textPanelContent != null) {
                textPanel.setDescriptionText(textPanelContent + "\n" + buff.toString());
            } else {
                textPanel.setDescriptionText(buff.toString());
            }
            while (tagIterator.hasNext()) {
                try {
                    Tag currentTag = (Tag) tagIterator.next();
//                    int tagType = iptcDirectory.getInt(currentTag.getTagType());
                    status.setText("Extracting IPTC: " + currentTag.getTagName());
                    System.out.println("Extracting IPTC: " + currentTag.getTagName());
                    debug(currentTag.getTagName() + ": " + currentTag.getTagName());
                    creationPanel.addKeyValuePair("(IPTC) " + currentTag.getTagName(), currentTag.getDescription());
                } catch (MetadataException e) {
                    System.err.println("Exception parsing tag .. " + e.toString());
                }
            }
            creationPanel.updateTable();
        } catch (IOException e) {
            debug("IOException reading EXIF: " + e.getMessage());
        } catch (JpegProcessingException e) {
            e.printStackTrace();
        }
        /*
        catch (ExifProcessingException e) {
            // Keine EXIF Info?
            debug("ExifProcessingException: " + e.getMessage());
            // creating std tags ... (werden manuell bef黮lt)
            creationPanel.addKeyValuePair("Make", "");
            creationPanel.addKeyValuePair("Model", "");
            // Setting time from file ... weil ja keine Info da ..
            Calendar c = Calendar.getInstance();
            c.setTime(new Date(img.lastModified()));
            String time = AnnotationToolkit.getMpeg7Time(c);
            creationPanel.setTime(time);
        } catch (MetadataException e) {
            e.printStackTrace();
        }
        */

        try {
            String filePath = img.getCanonicalPath();
            String mp7name = filePath.substring(0, filePath.lastIndexOf('.')) + ".mp7.xml";

            File mp7file = new File(mp7name);
            if (mp7file.exists()) {
                debug("Reading existing MPEG-7 information " + mp7name);
                status.setText("Reading existing MPEG-7 information");
                // ----------------------------
                // Reading from the MPEG-7 File
                // ----------------------------
                SAXBuilder builder = new SAXBuilder();
                Element root = builder.build(mp7file).getRootElement();

                // in case of the shape panel the whole document is
                // used to set the shapes ...
                shapePanel.setDescriptor(root);

                // textual description of the File ..
                String text = getSingleValue(root, "//Image/TextAnnotation/FreeTextAnnotation");
                if (text != null) textPanel.setDescriptionText(text);

                text = getSingleValue(root, "//Image/TextAnnotation/StructuredAnnotation/Who/Name");
                if (text != null) textPanel.setWho(text);
                text = getSingleValue(root, "//Image/TextAnnotation/StructuredAnnotation/When/Name");
                if (text != null) textPanel.setWhen(text);
                text = getSingleValue(root, "//Image/TextAnnotation/StructuredAnnotation/Where/Name");
                if (text != null) textPanel.setWhere(text);
                text = getSingleValue(root, "//Image/TextAnnotation/StructuredAnnotation/Why/Name");
                if (text != null) textPanel.setWhy(text);
                text = getSingleValue(root, "//Image/TextAnnotation/StructuredAnnotation/How/Name");
                if (text != null) textPanel.setHow(text);
                text = getSingleValue(root, "//Image/TextAnnotation/StructuredAnnotation/WhatAction/Name");
                if (text != null) textPanel.setWhatAction(text);
                text = getSingleValue(root, "//Image/TextAnnotation/StructuredAnnotation/WhatObject/Name");
                if (text != null) textPanel.setWhatObject(text);

                // description version
                text = getSingleValue(root, "//DescriptionMetadata/Version");
                if (text != null) mdpanel.setVersion(text);
                // description tool
                text = getSingleValue(root, "//DescriptionMetadata/Instrument/Tool/Name");
                if (text != null) mdpanel.setInstrument(text);
                // description date
                text = getSingleValue(root, "//DescriptionMetadata/CreationTime");
                if (text != null) mdpanel.setTime(text);
                // description comment
                text = getSingleValue(root, "//DescriptionMetadata/Comment/FreeTextAnnotation");
                if (text != null) mdpanel.setTextDescription(text);
                // quality & definition ob der Descriptor gebraucht wird ...
                text = getSingleValue(root, "//Image/MediaInformation/MediaProfile/MediaQuality/QualityRating/RatingValue");
                if (text != null) {
                    qPanel.setQuality(Integer.parseInt(text));
                    qPanel.setIncludeQuality(true);
                } else {
                    qPanel.setIncludeQuality(false);
                }
                // quality agent
                text = getSingleValue(root, "//Image/MediaInformation/MediaProfile/MediaQuality/RatingSource/Name/GivenName");
                String text2 = getSingleValue(root, "//Image/MediaInformation/MediaProfile/MediaQuality/RatingSource/Name/FamilyName");
                if (text != null && text2 != null) {
                    debug("setting quality agent: " + text2 + ", " + text);
                    qPanel.setAgent(text2 + ", " + text);
                }
                // description metadata agent
                text = getSingleValue(root, "//DescriptionMetadata/Creator/Agent/Name/GivenName");
                text2 = getSingleValue(root, "//DescriptionMetadata/Creator/Agent/Name/FamilyName");
                if (text != null && text2 != null) {
                    debug("setting description metadata agent: " + text2 + ", " + text);
                    mdpanel.setAgent(text2 + ", " + text);
                }
                // creation agent
                text = getSingleValue(root, "//CreationInformation/Creation/Creator/Agent/Name/GivenName");
                text2 = getSingleValue(root, "//CreationInformation/Creation/Creator/Agent/Name/FamilyName");
                if (text != null && text2 != null) {
                    debug("setting creation agent: " + text2 + ", " + text);
                    creationPanel.setAgent(text2 + ", " + text);
                }

                // semantics ...
                java.util.List results = AnnotationToolkit.xpathQuery(root, "//Image/Semantic", null);
                if (results.size() > 0) {
                    debug("setting bee semantic description ...");
                    bee.setSemantics((Element) ((Element) results.get(0)).detach());
                }

                // Scalable Color
                boolean ccset = false, clset = false, ehset = false;
                results = AnnotationToolkit.xpathQuery(root, "//VisualDescriptor", null);
                if (results.size() > 0) {
                    for (Iterator it1 = results.iterator(); it1.hasNext();) {
                        Element elem = (Element) it1.next();
                        java.util.List atts = elem.getAttributes();
                        for (Iterator it2 = atts.iterator(); it2.hasNext();) {
                            Attribute att = (Attribute) it2.next();
                            if (att.getValue().equals("ScalableColorType")) {
                                debug("setting Scalable Color ...");
                                colorPanel.setScalableColor(new ScalableColor((Element) elem.detach()));
                                ccset = true;
                            } else if (att.getValue().equals("ColorLayoutType")) {
                                debug("setting Color Layout ...");
                                colorPanel.setColorLayout(new ColorLayout((Element) elem.detach()));
                                clset = true;
                            } else if (att.getValue().equals("EdgeHistogramType")) {
                                debug("setting EdgeHistogram ...");
                                try {
                                    colorPanel.setEdgeHistogram(new EdgeHistogram((Element) elem.detach()));
                                    ehset = true;
                                } catch (Exception e) {
                                    e.printStackTrace();
                                }
                            }
                        }
                    }
                }
                if (!ccset) {
                    debug("Did not get the descriptor from XML: Extracing visual descriptor ScalableColor");
                    status.setText("Extracing visual descriptor ScalableColor ...");
                    colorPanel.setScalableColor(new ScalableColor(image));
                }
                if (!clset) {
                    debug("Did not get the descriptor from XML: Extracing visual descriptor ColorLayout");
                    status.setText("Extracing visual descriptor ColorLayout ...");
                    colorPanel.setColorLayout(new ColorLayout(image));
                }
                if (!ehset) {
                    debug("Did not get the descriptor from XML: Extracing visual descriptor EdgeHistogram");
                    status.setText("Extracing visual descriptor EdgeHistogram ...");
                    colorPanel.setEdgeHistogram(new EdgeHistogram(image));
                }
                debug("Finished reading MPEG-7 description");
                AnnotationFrame.setDirty(false);
                parent.setTitle(AnnotationFrame.TITLE_BAR + ": " + img.getName());
            } else {
                debug("No MPEG-7 Description found, i've searched for " + mp7name);
                // here we check if the image is too big and scale it down:
                // todo: configure via properties.
                int maxSideLength = 640;
                if (Math.max(image.getWidth(), image.getHeight()) > maxSideLength) {
                    status.setText("Scaling down image for extracing Descriptors ...");
                    double ow = image.getWidth();
                    double oh = image.getHeight();
                    double scale = 0.0;
                    if (ow > oh) {
                        scale = ((double) maxSideLength / ow);
                    }
                    else {
                        scale = ((double) maxSideLength / oh);
                    }
                    // create smaller image
                    BufferedImage img = new BufferedImage((int) (ow * scale), (int) (oh * scale), BufferedImage.TYPE_INT_RGB);
                    // fast scale
                    Graphics g = img.getGraphics();
                    g.drawImage(image, 0, 0, img.getWidth(), img.getHeight(), null);
                    // switch images
                    image = img;
                }
                debug("Extracing visual descriptor ColorLayout");
                status.setText("Extracing visual descriptor ColorLayout ...");
                colorPanel.setColorLayout(new ColorLayout(image));
                debug("Extracing visual descriptor ScalableColor");
                status.setText("Extracing visual descriptor ScalableColor ...");
                colorPanel.setScalableColor(new ScalableColor(image));
                status.setText("Extracing visual descriptor EdgeHistogram ...");
                colorPanel.setEdgeHistogram(new EdgeHistogram(image));
                shapePanel.setImage(image);
                AnnotationFrame.DIRTY = true;
            }
        } catch (IOException e) {
            debug("IOException while searching and reading existing MPEG-7 description " + e.toString());
        } catch (JDOMException e) {
            debug("Exception parsing existing MPEG-7 description" + e.toString());
        }

    }

    private void debug(String message) {
        if (AnnotationFrame.DEBUG)
            System.out.println("[at.lux.fotoannotation.ImageLoader] " + message);
    }

//    private void collectGarbage() {
//        debug("Mem: "
//                + df.format(Runtime.getRuntime().freeMemory() / (1024.0 * 1024.0)) + "MB of "
//                + df.format(Runtime.getRuntime().totalMemory() / (1024.0 * 1024.0)) + "MB free");
//
//        debug("starting garbage collector ...");
//        System.gc();
//        debug("finished collecting garbage!");
//
//        debug("Mem: "
//                + df.format(Runtime.getRuntime().freeMemory() / (1024.0 * 1024.0)) + "MB of "
//                + df.format(Runtime.getRuntime().totalMemory() / (1024.0 * 1024.0)) + "MB free");
//        status.setText("Garbage collection finished: "
//                + df.format(Runtime.getRuntime().freeMemory() / (1024.0 * 1024.0)) + "MB of "
//                + df.format(Runtime.getRuntime().totalMemory() / (1024.0 * 1024.0)) + "MB free");
//
//    }

    private String getSingleValue(Element root, String xpath) {
        String text = null;
        java.util.List results = AnnotationToolkit.xpathQuery(root, xpath, null);
        if (results.size() > 0) {
            text = ((Element) results.get(0)).getTextTrim();
        }
        return text;
    }
}