List of usage examples for javax.imageio ImageWriteParam setCompressionQuality
public void setCompressionQuality(float quality)
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; ///* w w w . j a v a 2 s .c o 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.mime.FormatModifier.java
public synchronized ImageWriteParam adjustImageWriteParam(ImageWriteParam param) { if (imgWriteParam == null) { if (getCompressionQuality() != null) { if (getResponseFormat() == ImageMime.jpeg) { param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); param.setCompressionQuality(getCompressionQuality()); } else { log.debug("FormatModifier only supports JPEG image parameters at this time."); }//ww w.j a v a2 s.com } imgWriteParam = param; } return imgWriteParam; }
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 w ww . j a v a2 s. co 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 ww w. j a v a 2 s . co 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//from w ww . ja v a2 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.tinymediamanager.core.ImageCache.java
/** * Scale image to fit in the given width. * //from www. java2s . co m * @param imageUrl * the image url * @param width * the width * @return the input stream * @throws IOException * Signals that an I/O exception has occurred. * @throws InterruptedException */ public static InputStream scaleImage(String imageUrl, int width) throws IOException, InterruptedException { Url url = new Url(imageUrl); BufferedImage originalImage = null; try { originalImage = createImage(url.getBytes()); } catch (Exception e) { throw new IOException(e.getMessage()); } Point size = new Point(); size.x = width; size.y = size.x * originalImage.getHeight() / originalImage.getWidth(); // BufferedImage scaledImage = Scaling.scale(originalImage, size.x, size.y); BufferedImage scaledImage = Scalr.resize(originalImage, Scalr.Method.QUALITY, Scalr.Mode.AUTOMATIC, size.x, size.y, Scalr.OP_ANTIALIAS); originalImage = null; ImageWriter imgWrtr = null; ImageWriteParam imgWrtrPrm = null; // here we have two different ways to create our thumb // a) a scaled down jpg/png (without transparency) which we have to modify since OpenJDK cannot call native jpg encoders // b) a scaled down png (with transparency) which we can store without any more modifying as png if (hasTransparentPixels(scaledImage)) { // transparent image -> png imgWrtr = ImageIO.getImageWritersByFormatName("png").next(); imgWrtrPrm = imgWrtr.getDefaultWriteParam(); } else { // non transparent image -> jpg // convert to rgb BufferedImage rgb = new BufferedImage(scaledImage.getWidth(), scaledImage.getHeight(), BufferedImage.TYPE_INT_RGB); ColorConvertOp xformOp = new ColorConvertOp(null); xformOp.filter(scaledImage, rgb); imgWrtr = ImageIO.getImageWritersByFormatName("jpg").next(); imgWrtrPrm = imgWrtr.getDefaultWriteParam(); imgWrtrPrm.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT); imgWrtrPrm.setCompressionQuality(0.80f); scaledImage = rgb; } ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageOutputStream output = ImageIO.createImageOutputStream(baos); imgWrtr.setOutput(output); IIOImage outputImage = new IIOImage(scaledImage, null, null); imgWrtr.write(null, outputImage, imgWrtrPrm); imgWrtr.dispose(); scaledImage = null; byte[] bytes = baos.toByteArray(); output.flush(); output.close(); baos.close(); return new ByteArrayInputStream(bytes); }
From source file:org.tinymediamanager.core.ImageCache.java
/** * Scale image to fit in the given width. * /*from ww w . j av a2s . c om*/ * @param file * the original image file * @param width * the width * @return the input stream * @throws IOException * Signals that an I/O exception has occurred. * @throws InterruptedException */ public static InputStream scaleImage(Path file, int width) throws IOException, InterruptedException { BufferedImage originalImage = null; try { originalImage = createImage(file); } catch (Exception e) { throw new IOException(e.getMessage()); } Point size = new Point(); size.x = width; size.y = size.x * originalImage.getHeight() / originalImage.getWidth(); // BufferedImage scaledImage = Scaling.scale(originalImage, size.x, size.y); BufferedImage scaledImage = Scalr.resize(originalImage, Scalr.Method.QUALITY, Scalr.Mode.AUTOMATIC, size.x, size.y, Scalr.OP_ANTIALIAS); originalImage = null; ImageWriter imgWrtr = null; ImageWriteParam imgWrtrPrm = null; // here we have two different ways to create our thumb // a) a scaled down jpg/png (without transparency) which we have to modify since OpenJDK cannot call native jpg encoders // b) a scaled down png (with transparency) which we can store without any more modifying as png if (hasTransparentPixels(scaledImage)) { // transparent image -> png imgWrtr = ImageIO.getImageWritersByFormatName("png").next(); imgWrtrPrm = imgWrtr.getDefaultWriteParam(); } else { // non transparent image -> jpg // convert to rgb BufferedImage rgb = new BufferedImage(scaledImage.getWidth(), scaledImage.getHeight(), BufferedImage.TYPE_INT_RGB); ColorConvertOp xformOp = new ColorConvertOp(null); xformOp.filter(scaledImage, rgb); imgWrtr = ImageIO.getImageWritersByFormatName("jpg").next(); imgWrtrPrm = imgWrtr.getDefaultWriteParam(); imgWrtrPrm.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT); imgWrtrPrm.setCompressionQuality(0.80f); scaledImage = rgb; } ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageOutputStream output = ImageIO.createImageOutputStream(baos); imgWrtr.setOutput(output); IIOImage outputImage = new IIOImage(scaledImage, null, null); imgWrtr.write(null, outputImage, imgWrtrPrm); imgWrtr.dispose(); scaledImage = null; byte[] bytes = baos.toByteArray(); output.flush(); output.close(); baos.close(); return new ByteArrayInputStream(bytes); }
From source file:org.tinymediamanager.core.ImageCache.java
/** * Cache image./* www. j a v a 2 s .co m*/ * * @param mf * the media file * @return the file the cached file * @throws Exception */ public static Path cacheImage(Path originalFile) throws Exception { MediaFile mf = new MediaFile(originalFile); Path cachedFile = ImageCache.getCacheDir() .resolve(getMD5(originalFile.toString()) + "." + Utils.getExtension(originalFile)); if (!Files.exists(cachedFile)) { // check if the original file exists && size > 0 if (!Files.exists(originalFile)) { throw new FileNotFoundException("unable to cache file: " + originalFile + "; file does not exist"); } if (Files.size(originalFile) == 0) { throw new EmptyFileException(originalFile); } // recreate cache dir if needed // rescale & cache BufferedImage originalImage = null; try { originalImage = createImage(originalFile); } catch (Exception e) { throw new Exception("cannot create image - file seems not to be valid? " + originalFile); } // calculate width based on MF type int desiredWidth = originalImage.getWidth(); // initialize with fallback switch (mf.getType()) { case FANART: if (originalImage.getWidth() > 1000) { desiredWidth = 1000; } break; case POSTER: if (originalImage.getHeight() > 500) { desiredWidth = 350; } break; case EXTRAFANART: case THUMB: case BANNER: case GRAPHIC: desiredWidth = 300; break; default: break; } // special handling for movieset-fanart or movieset-poster if (mf.getFilename().startsWith("movieset-fanart") || mf.getFilename().startsWith("movieset-poster")) { if (originalImage.getWidth() > 1000) { desiredWidth = 1000; } } Point size = calculateSize(desiredWidth, (int) (originalImage.getHeight() / 1.5), originalImage.getWidth(), originalImage.getHeight(), true); BufferedImage scaledImage = null; if (Globals.settings.getImageCacheType() == CacheType.FAST) { // scale fast scaledImage = Scalr.resize(originalImage, Scalr.Method.BALANCED, Scalr.Mode.FIT_EXACT, size.x, size.y); } else { // scale with good quality scaledImage = Scalr.resize(originalImage, Scalr.Method.QUALITY, Scalr.Mode.FIT_EXACT, size.x, size.y); } originalImage = null; ImageWriter imgWrtr = null; ImageWriteParam imgWrtrPrm = null; // here we have two different ways to create our thumb // a) a scaled down jpg/png (without transparency) which we have to modify since OpenJDK cannot call native jpg encoders // b) a scaled down png (with transparency) which we can store without any more modifying as png if (hasTransparentPixels(scaledImage)) { // transparent image -> png imgWrtr = ImageIO.getImageWritersByFormatName("png").next(); imgWrtrPrm = imgWrtr.getDefaultWriteParam(); } else { // non transparent image -> jpg // convert to rgb BufferedImage rgb = new BufferedImage(scaledImage.getWidth(), scaledImage.getHeight(), BufferedImage.TYPE_INT_RGB); ColorConvertOp xformOp = new ColorConvertOp(null); xformOp.filter(scaledImage, rgb); imgWrtr = ImageIO.getImageWritersByFormatName("jpg").next(); imgWrtrPrm = imgWrtr.getDefaultWriteParam(); imgWrtrPrm.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT); imgWrtrPrm.setCompressionQuality(0.80f); scaledImage = rgb; } FileImageOutputStream output = new FileImageOutputStream(cachedFile.toFile()); imgWrtr.setOutput(output); IIOImage image = new IIOImage(scaledImage, null, null); imgWrtr.write(null, image, imgWrtrPrm); imgWrtr.dispose(); output.flush(); output.close(); scaledImage = null; } if (!Files.exists(cachedFile)) { throw new Exception("unable to cache file: " + originalFile); } return cachedFile; }
From source file:pl.edu.icm.visnow.lib.utils.ImageUtilities.java
public static void writeJpeg(BufferedImage img, float quality, File file) throws IOException { if (img == null) { return;/* w w w .j av a 2s. co m*/ } float q = quality; if (q < 0) { q = 0; } if (q > 1) { q = 1; } Iterator iter = ImageIO.getImageWritersByFormatName("jpeg"); ImageWriter writer = (ImageWriter) iter.next(); ImageWriteParam iwp = writer.getDefaultWriteParam(); iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); iwp.setCompressionQuality(q); // float between 0 and 1 // 1 specifies minimum compression and maximum quality FileImageOutputStream output = new FileImageOutputStream(file); writer.setOutput(output); IIOImage image = new IIOImage(img, null, null); writer.write(null, image, iwp); writer.dispose(); }