Example usage for javax.imageio ImageWriter getDefaultWriteParam

List of usage examples for javax.imageio ImageWriter getDefaultWriteParam

Introduction

In this page you can find the example usage for javax.imageio ImageWriter getDefaultWriteParam.

Prototype

public ImageWriteParam getDefaultWriteParam() 

Source Link

Document

Returns a new ImageWriteParam object of the appropriate type for this file format containing default values, that is, those values that would be used if no ImageWriteParam object were specified.

Usage

From source file:org.egov.infra.utils.ImageUtils.java

public static File compressImage(final InputStream imageStream, String imageFileName, boolean closeStream)
        throws IOException {
    File compressedImage = Paths.get(imageFileName).toFile();
    try (final ImageOutputStream imageOutput = createImageOutputStream(compressedImage)) {
        ImageWriter writer = getImageWritersByFormatName(
                defaultString(getExtension(imageFileName), JPG_FORMAT_NAME)).next();
        writer.setOutput(imageOutput);//from  w  ww .  ja v a 2s .c  o m
        ImageWriteParam writeParam = writer.getDefaultWriteParam();
        if (writeParam.canWriteCompressed()) {
            writeParam.setCompressionMode(MODE_EXPLICIT);
            writeParam.setCompressionType(writeParam.getCompressionTypes()[0]);
            writeParam.setCompressionQuality(0.05F);
        }
        writer.write(null, new IIOImage(read(imageStream), null, null), writeParam);
        writer.dispose();
        if (closeStream)
            imageStream.close();
    }
    return compressedImage;
}

From source file:org.egov.works.abstractestimate.service.EstimatePhotographService.java

public File compressImage(final MultipartFile[] files) throws IOException, FileNotFoundException {

    final BufferedImage image = ImageIO.read(files[0].getInputStream());
    final File compressedImageFile = new File(files[0].getOriginalFilename());
    final OutputStream os = new FileOutputStream(compressedImageFile);
    String fileExtenstion = files[0].getOriginalFilename();
    fileExtenstion = fileExtenstion.substring(fileExtenstion.lastIndexOf(".") + 1);
    final Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(fileExtenstion);
    final ImageWriter writer = writers.next();
    final ImageOutputStream ios = ImageIO.createImageOutputStream(os);
    writer.setOutput(ios);/* w  w w  .  j a va 2s  .  c o  m*/
    final ImageWriteParam param = writer.getDefaultWriteParam();

    if (!fileExtenstion.equalsIgnoreCase("png")) {
        param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
        param.setCompressionQuality(0.5f);
    }
    writer.write(null, new IIOImage(image, null, null), param);

    os.close();
    ios.close();
    writer.dispose();
    return compressedImageFile;
}

From source file:org.forgerock.doc.maven.PNGUtils.java

private static void saveBufferedImage(final BufferedImage bufferedImage, final File outputFile,
        final int dotsPerInch) throws IOException {
    for (Iterator<ImageWriter> iw = ImageIO.getImageWritersByFormatName("png"); iw.hasNext();) {
        ImageWriter writer = iw.next();
        ImageWriteParam writeParam = writer.getDefaultWriteParam();
        ImageTypeSpecifier typeSpecifier = ImageTypeSpecifier
                .createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);
        IIOMetadata metadata = writer.getDefaultImageMetadata(typeSpecifier, writeParam);
        if (metadata.isReadOnly() || !metadata.isStandardMetadataFormatSupported()) {
            continue;
        }//w w w  .  jav a2  s . c om

        setDPI(metadata, dotsPerInch);

        final ImageOutputStream stream = ImageIO.createImageOutputStream(outputFile);
        try {
            writer.setOutput(stream);
            writer.write(metadata, new IIOImage(bufferedImage, null, metadata), writeParam);
        } finally {
            stream.close();
        }
        break;
    }
}

From source file:org.freecine.filmscan.Project.java

private void saveImage(RenderedImage img, File file) {
    // Find a writer for that file extensions
    // Try to determine the file type based on extension
    String ftype = "jpg";
    String imageFname = file.getName();
    int extIndex = imageFname.lastIndexOf(".") + 1;
    if (extIndex > 0) {
        ftype = imageFname.substring(extIndex);
    }/*w  ww .  j a  va  2s  .c om*/

    ImageWriter writer = null;
    Iterator iter = ImageIO.getImageWritersBySuffix(ftype);
    writer = (ImageWriter) iter.next();

    if (writer != null) {
        ImageOutputStream ios = null;
        try {
            // Prepare output file
            ios = ImageIO.createImageOutputStream(file);
            writer.setOutput(ios);
            // Set some parameters
            ImageWriteParam param = writer.getDefaultWriteParam();
            writer.write(null, new IIOImage(img, null, null), param);

            // Cleanup
            ios.flush();

        } catch (IOException ex) {
            log.severe("Error saving image " + file.getAbsolutePath() + ": " + ex.getMessage());
        } finally {
            if (ios != null) {
                try {
                    ios.close();
                } catch (IOException e) {
                    log.severe("Error closing output stream: " + e.getMessage());
                }
            }
            writer.dispose();
        }
    }
}

From source file:org.geotools.utils.imageoverviews.OverviewsEmbedder.java

public void run() {
    // did we create a local private tile cache or not?
    boolean localTileCache = false;
    ////from   w  w  w . j a  v  a 2s . co  m
    // creating the image to use for the successive
    // subsampling
    //
    TileCache baseTC = JAI.getDefaultInstance().getTileCache();

    if (baseTC == null) {
        localTileCache = true;
        final long tilecacheSize = super.getTileCacheSize();
        baseTC = JAI.createTileCache();
        baseTC.setMemoryCapacity(tilecacheSize);
        baseTC.setMemoryThreshold(0.75f);
    }

    //
    // CHECK INPUT DIRECTORIES/FILES
    //
    if (sourcePath == null) {
        fireEvent("Provided sourcePath is null", overallProgress);
        return;
    }
    // getting an image input stream to the file
    final File file = new File(sourcePath);
    final File[] files;
    int numFiles = 1;
    StringBuilder message;
    if (!file.canRead() || !file.exists()) {
        fireEvent("Provided file " + file.getAbsolutePath() + " cannot be read or does not exist", 100);
        return;
    }
    if (file.isDirectory()) {
        if (wildcardString == null) {
            fireEvent("Provided wildcardString is null", 100);
            return;
        }
        final FileFilter fileFilter = new WildcardFileFilter(wildcardString);
        files = file.listFiles(fileFilter);
        numFiles = files.length;
        if (numFiles <= 0) {
            message = new StringBuilder("No files to process!");
            if (LOGGER.isLoggable(Level.FINE)) {
                LOGGER.fine(message.toString());
            }
            fireEvent(message.toString(), 100);

        }

    } else
        files = new File[] { file };

    if (files == null || files.length == 0) {
        fireEvent("Unable to find input files for the provided wildcard " + wildcardString + " and input path "
                + sourcePath, 100);
        return;
    }
    // setting step
    overallProgressStep = 100 * 1.0 / numFiles;

    //
    // ADDING OVERVIEWS TO ALL FOUND FILES
    //
    for (fileBeingProcessed = 0; fileBeingProcessed < numFiles; fileBeingProcessed++) {

        message = new StringBuilder("Managing file  ").append(fileBeingProcessed).append(" of ")
                .append(files[fileBeingProcessed]).append(" files");
        if (LOGGER.isLoggable(Level.FINE)) {
            LOGGER.fine(message.toString());
        }

        overallProgress = overallProgressStep * fileBeingProcessed;
        fireEvent(message.toString(), overallProgress);

        if (getStopThread()) {
            message = new StringBuilder("Stopping requested at file  ").append(fileBeingProcessed)
                    .append(" of ").append(numFiles).append(" files");
            if (LOGGER.isLoggable(Level.FINE)) {
                LOGGER.fine(message.toString());
            }
            fireEvent(message.toString(), overallProgress);
            return;
        }

        ImageInputStream stream = null;
        ImageWriter writer = null;
        ImageOutputStream streamOut = null;
        RenderedOp currentImage = null;
        RenderedOp newImage = null;
        try {

            File localFile = files[fileBeingProcessed];

            //
            // get a stream
            //
            stream = ImageIO.createImageInputStream(localFile);
            if (stream == null) {

                message = new StringBuilder("Unable to create an input stream for file")
                        .append(files[fileBeingProcessed]);
                if (LOGGER.isLoggable(Level.SEVERE)) {
                    LOGGER.severe(message.toString());
                }
                fireEvent(message.toString(), overallProgress);
                break;
            }
            stream.mark();

            //
            // get a reader
            //
            final Iterator<ImageReader> it = ImageIO.getImageReaders(stream);
            if (!it.hasNext()) {
                message = new StringBuilder("Unable to find a reader for file")
                        .append(files[fileBeingProcessed]);
                if (LOGGER.isLoggable(Level.SEVERE)) {
                    LOGGER.severe(message.toString());
                }
                fireEvent(message.toString(), overallProgress);
                break;
            }
            final ImageReader reader = (ImageReader) it.next();
            stream.reset();
            stream.mark();
            // is it a geotiff reader or not?
            if (!reader.getFormatName().toLowerCase().startsWith("tif")) {
                if (LOGGER.isLoggable(Level.INFO)) {
                    LOGGER.info("Discarding input file " + files[fileBeingProcessed]
                            + " since it is not a proper tif file.");
                }
                continue;
            }

            //
            // set input
            //
            reader.setInput(stream);
            ImageLayout layout = null;
            // tiling the image if needed
            int actualTileW = reader.getTileWidth(0);
            int actualTileH = reader.getTileHeight(0);
            if (!reader.isImageTiled(0) || (reader.isImageTiled(0) && (actualTileH != tileH && tileH != -1)
                    || (actualTileW != tileW && tileW != -1))) {

                message = new StringBuilder("Retiling image  ").append(fileBeingProcessed);
                if (LOGGER.isLoggable(Level.FINE)) {
                    LOGGER.fine(message.toString());
                }
                fireEvent(message.toString(), overallProgress);
                layout = Utils.createTiledLayout(tileW, tileH, 0, 0);
            }
            stream.reset();
            reader.reset();
            reader.dispose();

            //
            // output image stream
            //
            if (externalOverviews) {
                // create a sibling file
                localFile = new File(localFile.getParent(),
                        FilenameUtils.getBaseName(localFile.getAbsolutePath()) + ".tif.ovr");
            }
            streamOut = ImageIOExt.createImageOutputStream(null, localFile);
            if (streamOut == null) {
                message = new StringBuilder("Unable to acquire an ImageOutputStream for the file ")
                        .append(files[fileBeingProcessed].toString());
                if (LOGGER.isLoggable(Level.SEVERE)) {
                    LOGGER.severe(message.toString());
                }
                fireEvent(message.toString(), 100);
                break;
            }

            //
            // Preparing to write the set of images. First of all I write
            // the first image `
            //
            // getting a writer for this reader
            writer = TIFF_IMAGE_WRITER_SPI.createWriterInstance();
            writer.setOutput(streamOut);
            writer.addIIOWriteProgressListener(writeProgressListener);
            writer.addIIOWriteWarningListener(writeProgressListener);
            ImageWriteParam param = writer.getDefaultWriteParam();

            //
            // setting tiling on the first image using writing parameters
            //
            if (tileH != -1 & tileW != -1) {
                param.setTilingMode(ImageWriteParam.MODE_EXPLICIT);
                param.setTiling(tileW, tileH, 0, 0);

            } else {
                param.setTilingMode(ImageWriteParam.MODE_EXPLICIT);
                param.setTiling(actualTileW, actualTileH, 0, 0);
            }
            if (this.compressionScheme != null && !Double.isNaN(compressionRatio)) {
                param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
                param.setCompressionType(compressionScheme);
                param.setCompressionQuality((float) this.compressionRatio);
            }

            final RenderingHints newHints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, layout);
            newHints.add(new RenderingHints(JAI.KEY_TILE_CACHE, baseTC));

            // read base image
            ParameterBlock pbjRead = new ParameterBlock();
            pbjRead.add(stream);
            pbjRead.add(Integer.valueOf(0));
            pbjRead.add(Boolean.FALSE);
            pbjRead.add(Boolean.FALSE);
            pbjRead.add(Boolean.FALSE);
            pbjRead.add(null);
            pbjRead.add(null);
            pbjRead.add(null);
            pbjRead.add(null);
            currentImage = JAI.create("ImageRead", pbjRead, newHints);
            message = new StringBuilder("Read original image  ").append(fileBeingProcessed);
            if (LOGGER.isLoggable(Level.FINE)) {
                LOGGER.fine(message.toString());
            }
            fireEvent(message.toString(), overallProgress);
            int i = 0;
            //
            // OVERVIEWS CYLE
            //
            for (overviewInProcess = 0; overviewInProcess < numSteps; overviewInProcess++) {

                message = new StringBuilder("Subsampling step ").append(overviewInProcess + 1)
                        .append(" of image  ").append(fileBeingProcessed);
                if (LOGGER.isLoggable(Level.FINE)) {
                    LOGGER.fine(message.toString());
                }
                fireEvent(message.toString(), overallProgress);

                // paranoiac check
                if (currentImage.getWidth() / downsampleStep <= 0
                        || currentImage.getHeight() / downsampleStep <= 0)
                    break;

                // SCALE

                // subsampling the input image using the chosen algorithm
                final SubsampleAlgorithm algorithm = SubsampleAlgorithm.valueOf(scaleAlgorithm);
                switch (algorithm) {
                case Average:
                    newImage = Utils.scaleAverage(currentImage, baseTC, downsampleStep, borderExtender);
                    break;
                case Filtered:
                    newImage = Utils.filteredSubsample(currentImage, baseTC, downsampleStep, lowPassFilter);
                    break;
                case Bilinear:
                    newImage = Utils.subsample(currentImage, baseTC, new InterpolationBilinear(),
                            downsampleStep, borderExtender);
                    break;
                case Bicubic:
                    newImage = Utils.subsample(currentImage, baseTC, new InterpolationBicubic(2),
                            downsampleStep, borderExtender);
                    break;
                case Nearest:
                    newImage = Utils.subsample(currentImage, baseTC, new InterpolationNearest(), downsampleStep,
                            borderExtender);
                    break;
                default:
                    throw new IllegalArgumentException("Invalid scaling algorithm " + scaleAlgorithm);//cannot get here

                }

                //set relevant metadata
                IIOMetadata imageMetadata = null;
                if (writer instanceof TIFFImageWriter) {
                    imageMetadata = writer.getDefaultImageMetadata(new ImageTypeSpecifier(newImage), param);
                    if (imageMetadata != null)
                        ((TIFFImageMetadata) imageMetadata).addShortOrLongField(
                                BaselineTIFFTagSet.TAG_NEW_SUBFILE_TYPE,
                                BaselineTIFFTagSet.NEW_SUBFILE_TYPE_REDUCED_RESOLUTION);
                }
                // write out
                if (!externalOverviews || i > 0)
                    writer.writeInsert(-1, new IIOImage(newImage, null, imageMetadata), param);
                else
                    writer.write(null, new IIOImage(newImage, null, imageMetadata), param);
                message = new StringBuilder("Step ").append(overviewInProcess + 1).append(" of image  ")
                        .append(fileBeingProcessed).append(" done!");
                if (LOGGER.isLoggable(Level.FINE)) {
                    LOGGER.fine(message.toString());
                }
                fireEvent(message.toString(), overallProgress);

                // switching images
                currentImage.dispose(); //dispose old image
                currentImage = newImage;

                i++;

            }

            overallProgress = 100;
            // close message
            message = new StringBuilder("Done with  image  ").append(fileBeingProcessed);
            if (LOGGER.isLoggable(Level.FINE)) {
                LOGGER.fine(message.toString());
            }
            fireEvent(message.toString(), overallProgress);
        } catch (Throwable e) {
            fireException(e);
        } finally {
            // clean up

            // clean caches if they are local
            if (localTileCache && baseTC != null)
                try {
                    baseTC.flush();
                } catch (Exception e) {
                }

            //
            // free everything
            try {
                if (streamOut != null)
                    streamOut.close();
            } catch (Throwable e) {
                if (LOGGER.isLoggable(Level.FINE))
                    LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
            }

            try {
                if (writer != null)
                    writer.dispose();
            } catch (Throwable e) {
                if (LOGGER.isLoggable(Level.FINE))
                    LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
            }

            try {
                if (currentImage != null)
                    currentImage.dispose();
            } catch (Throwable e) {
                if (LOGGER.isLoggable(Level.FINE))
                    LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
            }

            try {
                if (newImage != null)
                    newImage.dispose();
            } catch (Throwable e) {
                if (LOGGER.isLoggable(Level.FINE))
                    LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
            }

            try {
                if (stream != null)
                    stream.close();

            } catch (Throwable e) {
                if (LOGGER.isLoggable(Level.FINE))
                    LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
            }
        }
    }

    if (LOGGER.isLoggable(Level.FINE))
        LOGGER.fine("Done!!!");

}

From source file:org.geowebcache.layer.MetaTile.java

/**
 * Outputs one tile from the internal array of tiles to a provided stream
 * //from w  w w.jav a 2 s .c  o  m
 * @param tileIdx
 *            the index of the tile relative to the internal array
 * @param format
 *            the Java name for the format
 * @param resource
 *            the outputstream
 * @return true if no error was encountered
 * @throws IOException
 */
public boolean writeTileToStream(final int tileIdx, Resource target) throws IOException {
    if (tiles == null) {
        return false;
    }
    String format = responseFormat.getInternalName();

    if (log.isDebugEnabled()) {
        log.debug("Thread: " + Thread.currentThread().getName() + " writing: " + tileIdx);
    }

    // TODO should we recycle the writers ?
    // GR: it'd be only a 2% perf gain according to profile   
    Iterator<ImageWriter> it = javax.imageio.ImageIO.getImageWritersByFormatName(format);
    ImageWriter writer = it.next();
    ImageWriteParam param = writer.getDefaultWriteParam();

    if (this.formatModifier != null) {
        param = formatModifier.adjustImageWriteParam(param);
    }

    Rectangle tileRegion = tiles[tileIdx];
    RenderedImage tile = createTile(tileRegion.x, tileRegion.y, tileRegion.width, tileRegion.height);
    disposeLater(tile);
    OutputStream outputStream = target.getOutputStream();
    ImageOutputStream imgOut = new MemoryCacheImageOutputStream(outputStream);
    writer.setOutput(imgOut);
    IIOImage image = new IIOImage(tile, null, null);
    try {
        writer.write(null, image, param);
    } finally {
        imgOut.close();
        writer.dispose();
    }

    return true;
}

From source file:org.hippoecm.frontend.plugins.gallery.imageutil.ImageUtils.java

/**
 * Returns the data of a {@link BufferedImage} as a binary output stream. If the image is <code>null</code>,
 * a stream of zero bytes is returned./*from  ww  w . j ava  2  s.c  o m*/
 *
 * @param writer the writer to use for writing the image data.
 * @param image the image to write.
 * @param compressionQuality a float between 0 and 1 that indicates the desired compression quality. Values lower than
 *                           0 will be interpreted as 0, values higher than 1 will be interpreted as 1.
 *
 * @return an output stream with the data of the given image.
 *
 * @throws IOException when creating the binary output stream failed.
 */
public static ByteArrayOutputStream writeImage(ImageWriter writer, BufferedImage image,
        float compressionQuality) throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();

    if (image != null) {
        ImageOutputStream ios = null;
        try {
            ios = ImageIO.createImageOutputStream(out);
            writer.setOutput(ios);

            // write compressed images with high quality
            final ImageWriteParam writeParam = writer.getDefaultWriteParam();
            if (writeParam.canWriteCompressed()) {
                String[] compressionTypes = writeParam.getCompressionTypes();
                if (compressionTypes != null && compressionTypes.length > 0) {
                    writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
                    writeParam.setCompressionType(compressionTypes[0]);

                    // ensure a compression quality between 0 and 1
                    float trimmedCompressionQuality = Math.max(compressionQuality, 0);
                    trimmedCompressionQuality = Math.min(trimmedCompressionQuality, 1f);
                    writeParam.setCompressionQuality(trimmedCompressionQuality);
                }
            }

            final IIOImage iioImage = new IIOImage(image, null, null);
            writer.write(null, iioImage, writeParam);
            ios.flush();
        } finally {
            if (ios != null) {
                ios.close();
            }
        }
    }

    return out;
}

From source file:org.olat.core.commons.services.image.spi.ImageHelperImpl.java

private static ImageWriteParam getOptimizedImageWriteParam(ImageWriter writer, Size scaledSize) {
    ImageWriteParam iwp = writer.getDefaultWriteParam();
    try {/*from w  w  w .j ava 2 s .c  o m*/
        if (iwp.canWriteCompressed()) {
            iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
            int maxSize = Math.max(scaledSize.getWidth(), scaledSize.getHeight());
            if (maxSize <= 50) {
                iwp.setCompressionQuality(0.95f);
            } else if (maxSize <= 100) {
                iwp.setCompressionQuality(0.90f);
            } else if (maxSize <= 200) {
                iwp.setCompressionQuality(0.85f);
            } else if (maxSize <= 500) {
                iwp.setCompressionQuality(0.80f);
            } else {
                iwp.setCompressionQuality(0.75f);
            }
        }
    } catch (Exception e) {
        //bmp can be compressed but don't allow it!!!
        return writer.getDefaultWriteParam();
    }
    return iwp;
}

From source file:org.onehippo.forge.gallerymagick.core.command.ScalrProcessorUtils.java

/**
 * Resize the given image {@code sourceFile} with resizing it to {@code width} and {@code height}
 * and store the resized image to {@code targetFile}, with appending {@code extraOptions} in the command line if provided.
 * @param sourceFile source image file/*www  . j ava  2 s  .  c o  m*/
 * @param targetFile target image file
 * @param dimension image dimension
 * @param extraOptions extra command line options
 * @throws IOException if IO exception occurs
 */
public static void resizeImage(File sourceFile, File targetFile, ImageDimension dimension,
        String... extraOptions) throws IOException {
    if (dimension == null) {
        throw new IllegalArgumentException("Invalid dimension: " + dimension);
    }

    ImageReader reader = null;
    ImageWriter writer = null;

    try {
        reader = getImageReader(sourceFile);

        if (reader == null) {
            throw new IllegalArgumentException(
                    "Unsupported image file name extension for reading: " + sourceFile);
        }

        writer = getImageWriter(targetFile);

        if (writer == null) {
            throw new IllegalArgumentException(
                    "Unsupported image file name extension for writing: " + targetFile);
        }

        BufferedImage sourceImage = reader.read(0);
        BufferedImage resizedImage = Scalr.resize(sourceImage, Scalr.Method.QUALITY, Scalr.Mode.AUTOMATIC,
                dimension.getWidth(), dimension.getHeight());

        final ImageWriteParam writeParam = writer.getDefaultWriteParam();

        if (writeParam.canWriteCompressed()) {
            String[] compressionTypes = writeParam.getCompressionTypes();

            if (compressionTypes != null && compressionTypes.length > 0) {
                writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
                writeParam.setCompressionType(compressionTypes[0]);
                writeParam.setCompressionQuality(1.0f);
            }
        }

        final IIOImage iioImage = new IIOImage(resizedImage, null, null);
        writer.write(null, iioImage, writeParam);
    } finally {
        if (reader != null) {
            reader.dispose();
        }
        if (writer != null) {
            writer.dispose();
        }
    }
}

From source file:org.photovault.imginfo.CreateCopyImageCommand.java

/**
 Helper function to save a rendered image to file
 @param instanceFile The file into which the image will be saved
 @param img Image that willb e saved//from www  .j a  v  a2 s .  co m
 @param xmpData XPM metadata packet that should be saved with the image
 @throws PhotovaultException if saving does not succeed
 */
protected void saveImage(File instanceFile, RenderedImage img, byte[] xmpData) throws PhotovaultException {
    ImageOutputStream out = null;
    log.debug("Entry: saveImage, file = " + instanceFile.getAbsolutePath());
    try {
        out = new FileImageOutputStream(instanceFile);
    } catch (IOException e) {
        log.error("Error writing image: " + e.getMessage());
        throw new PhotovaultException(e.getMessage());
    }
    if (img.getSampleModel().getSampleSize(0) == 16) {
        log.debug("16 bit image, converting to 8 bits");
        double[] subtract = new double[1];
        subtract[0] = 0;
        double[] divide = new double[1];
        divide[0] = 1. / 256.;
        // Now we can rescale the pixels gray levels:
        ParameterBlock pbRescale = new ParameterBlock();
        pbRescale.add(divide);
        pbRescale.add(subtract);
        pbRescale.addSource(img);
        PlanarImage outputImage = (PlanarImage) JAI.create("rescale", pbRescale, null);
        // Make sure it is a byte image - force conversion.
        ParameterBlock pbConvert = new ParameterBlock();
        pbConvert.addSource(outputImage);
        pbConvert.add(DataBuffer.TYPE_BYTE);
        img = JAI.create("format", pbConvert);
    }

    IIOImage iioimg = new IIOImage(img, null, null);

    /*
     Not all encoders support metadata handling
     */
    Iterator writers = ImageIO.getImageWritersByFormatName("jpeg");
    ImageWriter imgwriter = null;
    while (writers.hasNext()) {
        imgwriter = (ImageWriter) writers.next();
        if (imgwriter.getClass().getName().endsWith("JPEGImageEncoder")) {
            // Break on finding the core provider.
            break;
        }
    }
    if (imgwriter == null) {
        System.err.println("Cannot find core JPEG writer!");
    }
    imgwriter.addIIOWriteWarningListener(new IIOWriteWarningListener() {

        public void warningOccurred(ImageWriter arg0, int arg1, String arg2) {
            log.warn("Warning from ImageWriter: " + arg2);
        }
    });
    ImageWriteParam params = imgwriter.getDefaultWriteParam();
    ImageTypeSpecifier its = ImageTypeSpecifier.createFromRenderedImage(img);
    IIOMetadata metadata = imgwriter.getDefaultImageMetadata(its, null);

    IIOMetadataNode metatop = (IIOMetadataNode) metadata.getAsTree("javax_imageio_jpeg_image_1.0");
    NodeList markerSeqNodes = metatop.getElementsByTagName("markerSequence");
    if (markerSeqNodes.getLength() > 0) {
        IIOMetadataNode xmpNode = new IIOMetadataNode("unknown");
        xmpNode.setAttribute("MarkerTag", "225");
        xmpNode.setUserObject(xmpData);
        markerSeqNodes.item(0).appendChild(xmpNode);
    }

    try {
        metadata.setFromTree("javax_imageio_jpeg_image_1.0", metatop);
    } catch (Exception e) {
        log.warn("error editing metadata: " + e.getMessage());
        e.printStackTrace();
        throw new PhotovaultException("error setting image metadata: \n" + e.getMessage());
    }

    iioimg.setMetadata(metadata);

    try {
        imgwriter.setOutput(out);
        imgwriter.write(iioimg);
    } catch (IOException e) {
        log.warn("Exception while encoding" + e.getMessage());
        throw new PhotovaultException(
                "Error writing instance " + instanceFile.getAbsolutePath() + ": " + e.getMessage());
    } finally {
        try {
            out.close();
        } catch (IOException e) {
            log.warn("Exception while closing file: " + e.getMessage());
            imgwriter.dispose();
            throw new PhotovaultException(
                    "Error writing instance " + instanceFile.getAbsolutePath() + ": " + e.getMessage());

        }
        imgwriter.dispose();
    }
    log.debug("Exit: saveImage");
}