@Test
public void lossyWrite() throws Exception {
File f = File.createTempFile("test-jpeg2000-lossy", ".jp2");
f.deleteOnExit();
Iterator<ImageWriter> writers = ImageIO.getImageWritersBySuffix("jp2");
assertTrue(writers.hasNext());
ImageWriter writer = writers.next();
J2KImageWriteParam writeParams = (J2KImageWriteParam) writer.getDefaultWriteParam();
writeParams.setLossless(false);
writeParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
writeParams.setCompressionType("JPEG2000");
// writeParams.setFilter(J2KImageWriteParam.FILTER_97);
writeParams.setCompressionQuality(0.0f);
writeParams.setEncodingRate(0.5f);
ImageOutputStream ios = ImageIO.createImageOutputStream(f);
writer.setOutput(ios);
writer.write(null, new IIOImage(image, null, null), writeParams);
writer.dispose();
ios.close();
assertTrue("Expected file size < 1MB", f.length() < 128 * 1024);
// System.out.println(f.length());
BufferedImage read = ImageIO.read(f);
assertEquals(SIZE, read.getWidth());
}
/**
* 图片文件转换为tif格式
*
* @param imageFile 文件路径
* @param imageFormat 文件扩展名
* @return
*/
public static File createImage(File imageFile, String imageFormat) {
File tempFile = null;
try {
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
ImageReader reader = readers.next();
ImageInputStream iis = ImageIO.createImageInputStream(imageFile);
reader.setInput(iis);
// Read the stream metadata
IIOMetadata streamMetadata = reader.getStreamMetadata();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.CHINESE);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("tiff");
ImageWriter writer = writers.next();
BufferedImage bi = reader.read(0);
IIOImage image = new IIOImage(bi, null, reader.getImageMetadata(0));
tempFile = tempImageFile(imageFile);
ImageOutputStream ios = ImageIO.createImageOutputStream(tempFile);
writer.setOutput(ios);
writer.write(streamMetadata, image, tiffWriteParam);
ios.close();
writer.dispose();
reader.dispose();
} catch (IOException e) {
e.printStackTrace();
}
return tempFile;
}
/**
* Gets pixel data of an <code>IIOImage</code> object.
*
* @param image an <code>IIOImage</code> object
* @return a byte buffer of pixel data
* @throws Exception
*/
public static ByteBuffer getImageByteBuffer(IIOImage image) throws IOException {
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
if (writer == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(outputStream);
writer.setOutput(ios);
writer.write(
streamMetadata, new IIOImage(image.getRenderedImage(), null, null), tiffWriteParam);
// writer.write(image.getRenderedImage());
writer.dispose();
// ImageIO.write(image.getRenderedImage(), "tiff", ios); // this can be used in lieu of
// writer
ios.seek(0);
BufferedImage bi = ImageIO.read(ios);
return convertImageData(bi);
}
@Override
public void writeImage(RenderedImage image, String mimeType, float quality, OutputStream out)
throws IOException {
if ("image/jpeg".equals(mimeType)) {
// Find a JPEG writer.
ImageWriter writer = null;
Iterator<ImageWriter> iter = ImageIO.getImageWritersByMIMEType(mimeType);
if (iter.hasNext()) {
writer = iter.next();
}
JPEGImageWriteParam iwp = new JPEGImageWriteParam(null);
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(quality);
// Prepare output file.
ImageOutputStream ios = ImageIO.createImageOutputStream(out);
writer.setOutput(ios);
// Write the image.
writer.write(null, new IIOImage(image, null, null), iwp);
// Cleanup.
ios.flush();
writer.dispose();
ios.close();
} else {
ImageIO.write(image, "png", out);
}
}
/**
* store BufferedImage to file
*
* @param image BufferedImage
* @param outputFile output image file
* @param quality quality of output image
* @return true success, else fail
*/
public static boolean storeImage(BufferedImage image, File outputFile, float quality) {
try {
// reconstruct folder structure for image file output
if (outputFile.getParentFile() != null && !outputFile.getParentFile().exists()) {
outputFile.getParentFile().mkdirs();
}
if (outputFile.exists()) {
outputFile.delete();
}
// get image file suffix
String extName = "gif";
// get registry ImageWriter for specified image suffix
Iterator writers = ImageIO.getImageWritersByFormatName(extName);
ImageWriter imageWriter = (ImageWriter) writers.next();
// set image output params
ImageWriteParam params = new JPEGImageWriteParam(null);
params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
params.setCompressionQuality(quality);
params.setProgressiveMode(javax.imageio.ImageWriteParam.MODE_DISABLED);
params.setDestinationType(
new ImageTypeSpecifier(
IndexColorModel.getRGBdefault(),
IndexColorModel.getRGBdefault().createCompatibleSampleModel(16, 16)));
// writer image to file
ImageOutputStream imageOutputStream = ImageIO.createImageOutputStream(outputFile);
imageWriter.setOutput(imageOutputStream);
imageWriter.write(null, new IIOImage(image, null, null), params);
imageOutputStream.close();
imageWriter.dispose();
return true;
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
/**
* Salva BufferedImage no arquivo informado na prop<br>
*
* <p><b>Exemplo:><br>
* <code>salvarImagem(img)</code>
*
* @param img BufferedImage a ser salva
* @author roberto
*/
private void salvarImagem(BufferedImage img) {
ImageWriter writer = null;
Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName(formatoImagem);
if (iter.hasNext()) {
writer = (ImageWriter) iter.next();
}
ImageOutputStream ios;
try {
ios = ImageIO.createImageOutputStream(new File(prop.getProp("dirImg")));
writer.setOutput(ios);
ImageWriteParam param = new JPEGImageWriteParam(java.util.Locale.getDefault());
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(1);
writer.write(null, new IIOImage(img, null, null), param);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Compress and save an image to the disk. Currently this method only supports JPEG images.
*
* @param image The image to save
* @param toFileName The filename to use
* @param type The image type. Use <code>ImageUtils.IMAGE_JPEG</code> to save as JPEG images, or
* <code>ImageUtils.IMAGE_PNG</code> to save as PNG.
*/
public static void saveCompressedImage(BufferedImage image, String toFileName, int type) {
try {
if (type == IMAGE_PNG) {
throw new UnsupportedOperationException("PNG compression not implemented");
}
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
ImageWriter writer;
writer = (ImageWriter) iter.next();
ImageOutputStream ios = ImageIO.createImageOutputStream(new File(toFileName));
writer.setOutput(ios);
ImageWriteParam iwparam = new JPEGImageWriteParam(Locale.getDefault());
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setCompressionQuality(0.7F);
writer.write(null, new IIOImage(image, null, null), iwparam);
ios.flush();
writer.dispose();
ios.close();
} catch (IOException e) {
throw new ForumException(e);
}
}
/**
* Gets pixel data of an <code>IIOImage</code> object.
*
* @param oimage an <code>IIOImage</code> object
* @return a byte buffer of pixel data
* @throws Exception
*/
public static ByteBuffer getImageByteBuffer(BufferedImage oimage) throws IOException {
// Get tif writer and set output to file
ImageWriter writer = new TIFFImageWriterSpi().createWriterInstance();
// Set up the writeParam
// We are using the old JAI ImageIO plugin, because for some reason, OCR don't work with
// TwelveMonkeys' plugin
ImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(outputStream);
writer.setOutput(ios);
writer.write(streamMetadata, new IIOImage(oimage, null, null), tiffWriteParam);
writer.dispose();
// Read the writed image
ios.seek(0);
ImageReader reader = new TIFFImageReaderSpi().createReaderInstance();
ImageReadParam param = reader.getDefaultReadParam();
reader.setInput(ios, true, true);
BufferedImage bi;
try {
bi = reader.read(0, param);
} finally {
reader.dispose();
ios.close();
}
return convertImageData(bi);
}
@SuppressWarnings("unchecked")
public void write() throws IOException {
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(EXTENSION);
ImageWriter writer = writers.next();
ImageWriteParam param = writer.getDefaultWriteParam();
IIOMetadata metadata = writer.getDefaultImageMetadata(new ImageTypeSpecifier(image), param);
if (metadata instanceof com.sun.imageio.plugins.png.PNGMetadata) {
com.sun.imageio.plugins.png.PNGMetadata pngMetadata =
(com.sun.imageio.plugins.png.PNGMetadata) metadata;
ArrayList keyword = pngMetadata.tEXt_keyword;
ArrayList text = pngMetadata.tEXt_text;
for (String key : this.metadata.keySet()) {
if (keyword == null) keyword = new ArrayList();
if (text == null) text = new ArrayList();
keyword.add(key);
text.add(this.metadata.get(key));
}
pngMetadata.tEXt_keyword = keyword;
pngMetadata.tEXt_text = text;
}
IIOImage iioi = new IIOImage(image, null, metadata);
ImageOutputStream ios = ImageIO.createImageOutputStream(file);
writer.setOutput(ios);
writer.write(iioi);
}
/**
* Test Writing capabilities.
*
* @throws FileNotFoundException
* @throws IOException
*/
@Test
public void write() throws IOException, FileNotFoundException {
if (!isGDALAvailable) {
return;
}
final File outputFile = TestData.temp(this, "writetest.tif", false);
outputFile.deleteOnExit();
final File inputFile = TestData.file(this, "utmByte.tif");
ImageReadParam rparam = new ImageReadParam();
rparam.setSourceRegion(new Rectangle(1, 1, 300, 500));
rparam.setSourceSubsampling(1, 2, 0, 0);
ImageReader reader = new GeoTiffImageReaderSpi().createReaderInstance();
reader.setInput(inputFile);
final IIOMetadata metadata = reader.getImageMetadata(0);
final ParameterBlockJAI pbjImageRead = new ParameterBlockJAI("ImageRead");
pbjImageRead.setParameter("Input", inputFile);
pbjImageRead.setParameter("reader", reader);
pbjImageRead.setParameter("readParam", rparam);
final ImageLayout l = new ImageLayout();
l.setTileGridXOffset(0).setTileGridYOffset(0).setTileHeight(256).setTileWidth(256);
RenderedOp image =
JAI.create("ImageRead", pbjImageRead, new RenderingHints(JAI.KEY_IMAGE_LAYOUT, l));
if (TestData.isInteractiveTest()) Viewer.visualizeAllInformation(image, "geotiff");
// ////////////////////////////////////////////////////////////////
// preparing to write
// ////////////////////////////////////////////////////////////////
final ParameterBlockJAI pbjImageWrite = new ParameterBlockJAI("ImageWrite");
ImageWriter writer = new GeoTiffImageWriterSpi().createWriterInstance();
pbjImageWrite.setParameter("Output", outputFile);
pbjImageWrite.setParameter("writer", writer);
pbjImageWrite.setParameter("ImageMetadata", metadata);
pbjImageWrite.setParameter("Transcode", false);
ImageWriteParam param = new ImageWriteParam(Locale.getDefault());
param.setSourceRegion(new Rectangle(10, 10, 100, 100));
param.setSourceSubsampling(2, 1, 0, 0);
pbjImageWrite.setParameter("writeParam", param);
pbjImageWrite.addSource(image);
final RenderedOp op = JAI.create("ImageWrite", pbjImageWrite);
final ImageWriter writer2 =
(ImageWriter) op.getProperty(ImageWriteDescriptor.PROPERTY_NAME_IMAGE_WRITER);
writer2.dispose();
// ////////////////////////////////////////////////////////////////
// preparing to read again
// ////////////////////////////////////////////////////////////////
final ParameterBlockJAI pbjImageReRead = new ParameterBlockJAI("ImageRead");
pbjImageReRead.setParameter("Input", outputFile);
pbjImageReRead.setParameter("Reader", new GeoTiffImageReaderSpi().createReaderInstance());
final RenderedOp image2 = JAI.create("ImageRead", pbjImageReRead);
if (TestData.isInteractiveTest()) Viewer.visualizeAllInformation(image2, "geotif2");
else Assert.assertNotNull(image2.getTiles());
}
/**
* Creates an image file of the specified format.
*
* @param file The file where to write the image.
* @param format One of the follow types: jpeg, png.
* @throws Exception Thrown if an error occurred while encoding the image.
*/
public void createImageFile(File file, String format) throws Exception {
Iterator writers = ImageIO.getImageWritersByFormatName(format);
ImageWriter writer = (ImageWriter) writers.next();
ImageOutputStream ios = ImageIO.createImageOutputStream(file);
writer.setOutput(ios);
writer.write(new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB));
ios.close();
}
/**
* Test Read on a Paletted Image
*
* @throws FileNotFoundException
* @throws IOException
*/
@Test
public void palette() throws FileNotFoundException, IOException {
if (!isGDALAvailable) {
return;
}
final File outputFile = TestData.temp(this, "writetest.tif", false);
outputFile.deleteOnExit();
final File inputFile = TestData.file(this, "paletted.tif");
ImageReader reader = new GeoTiffImageReaderSpi().createReaderInstance();
reader.setInput(inputFile);
final IIOMetadata metadata = reader.getImageMetadata(0);
final ParameterBlockJAI pbjImageRead = new ParameterBlockJAI("ImageRead");
pbjImageRead.setParameter("Input", inputFile);
pbjImageRead.setParameter("reader", reader);
final ImageLayout l = new ImageLayout();
l.setTileGridXOffset(0).setTileGridYOffset(0).setTileHeight(256).setTileWidth(256);
RenderedOp image =
JAI.create("ImageRead", pbjImageRead, new RenderingHints(JAI.KEY_IMAGE_LAYOUT, l));
if (TestData.isInteractiveTest()) Viewer.visualizeAllInformation(image, "Paletted image read");
// ////////////////////////////////////////////////////////////////
// preparing to write
// ////////////////////////////////////////////////////////////////
final ParameterBlockJAI pbjImageWrite = new ParameterBlockJAI("ImageWrite");
ImageWriter writer = new GeoTiffImageWriterSpi().createWriterInstance();
pbjImageWrite.setParameter("Output", outputFile);
pbjImageWrite.setParameter("writer", writer);
pbjImageWrite.setParameter("ImageMetadata", metadata);
pbjImageWrite.setParameter("Transcode", false);
pbjImageWrite.addSource(image);
final RenderedOp op = JAI.create("ImageWrite", pbjImageWrite);
final ImageWriter writer2 =
(ImageWriter) op.getProperty(ImageWriteDescriptor.PROPERTY_NAME_IMAGE_WRITER);
writer2.dispose();
// ////////////////////////////////////////////////////////////////
// preparing to read again
// ////////////////////////////////////////////////////////////////
final ParameterBlockJAI pbjImageReRead = new ParameterBlockJAI("ImageRead");
pbjImageReRead.setParameter("Input", outputFile);
pbjImageReRead.setParameter("Reader", new GeoTiffImageReaderSpi().createReaderInstance());
final RenderedOp image2 = JAI.create("ImageRead", pbjImageReRead);
if (TestData.isInteractiveTest())
Viewer.visualizeAllInformation(image2, "Paletted image read back after writing");
else Assert.assertNotNull(image2.getTiles());
ImageIOUtilities.disposeImage(image2);
ImageIOUtilities.disposeImage(image);
}
private static void write(File f, boolean raw, BufferedImage image) throws IOException {
Iterator<ImageWriter> writers = ImageIO.getImageWritersBySuffix("ppm");
assertTrue(writers.hasNext());
ImageWriter writer = writers.next();
PNMImageWriteParam params = (PNMImageWriteParam) writer.getDefaultWriteParam();
params.setRaw(raw);
ImageOutputStream ios = ImageIO.createImageOutputStream(f);
writer.setOutput(ios);
writer.write(null, new IIOImage(image, null, null), params);
writer.dispose();
ios.close();
}
/**
* Creates a list of TIFF image files from an image file. It basically converts images of other
* formats to TIFF format, or a multi-page TIFF image to multiple TIFF image files.
*
* @param imageFile input image file
* @param index an index of the page; -1 means all pages, as in a multi-page TIFF image
* @return a list of TIFF image files
* @throws Exception
*/
public static List<File> createTiffFiles(File imageFile, int index) throws IOException {
List<File> tiffFiles = new ArrayList<File>();
String imageFileName = imageFile.getName();
String imageFormat = imageFileName.substring(imageFileName.lastIndexOf('.') + 1);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
ImageReader reader = readers.next();
if (reader == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
ImageInputStream iis = ImageIO.createImageInputStream(imageFile);
reader.setInput(iis);
// Read the stream metadata
// IIOMetadata streamMetadata = reader.getStreamMetadata();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
// Read the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
int imageTotal = reader.getNumImages(true);
for (int i = 0; i < imageTotal; i++) {
// all if index == -1; otherwise, only index-th
if (index == -1 || i == index) {
// BufferedImage bi = reader.read(i);
// IIOImage oimage = new IIOImage(bi, null, reader.getImageMetadata(i));
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
writer.setOutput(ios);
writer.write(streamMetadata, oimage, tiffWriteParam);
ios.close();
tiffFiles.add(tiffFile);
}
}
writer.dispose();
reader.dispose();
return tiffFiles;
}
private static byte[] convertChartToByteArray(
Chart chartDetails, JFreeChart chart, int width, int height)
throws IOException, IIOInvalidTreeException {
BufferedImage buffImg =
chart.createBufferedImage(
width, height, BufferedImage.BITMASK | BufferedImage.SCALE_SMOOTH, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageWriter writer = ImageIO.getImageWritersByFormatName("png").next();
ImageWriteParam writeParam = writer.getDefaultWriteParam();
ImageTypeSpecifier typeSpecifier =
ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);
IIOMetadata metadata = writer.getDefaultImageMetadata(typeSpecifier, writeParam);
if (chartDetails != null) {
if (chartDetails.getId() == null) {
chartDetails.setId("%ID%");
}
IIOMetadataNode textEntry = new IIOMetadataNode("tEXtEntry");
textEntry.setAttribute("keyword", "chart-google-data");
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(bout);
objectOutputStream.writeObject(chartDetails);
objectOutputStream.flush();
textEntry.setAttribute(
"value",
(String)
ChartRendererFactory.getRendererForOutput(ChartRendererGoogleTools.TYPE)
.renderChart(chartDetails));
IIOMetadataNode text = new IIOMetadataNode("tEXt");
text.appendChild(textEntry);
IIOMetadataNode root = new IIOMetadataNode("javax_imageio_png_1.0");
root.appendChild(text);
metadata.mergeTree("javax_imageio_png_1.0", root);
}
// setDPI(metadata);
final ImageOutputStream stream = ImageIO.createImageOutputStream(baos);
try {
writer.setOutput(stream);
writer.write(metadata, new IIOImage(buffImg, null, metadata), writeParam);
} finally {
stream.close();
}
byte[] bytes = baos.toByteArray(); // ChartUtilities.encodeAsPNG(buffImg, true, 9);
return bytes;
}
/**
* Save an image
*
* @param fileName the name of the file
* @param img the img
* @throws FileNotFoundException
* @throws IOException
*/
private static void saveImage(String fileName, BufferedImage img)
throws FileNotFoundException, IOException {
Iterator iter = ImageIO.getImageWritersByFormatName("jpeg");
ImageWriter writer = (ImageWriter) iter.next();
ImageWriteParam iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(1);
File outputfile = new File(fileName);
FileImageOutputStream output = new FileImageOutputStream(outputfile);
writer.setOutput(output);
IIOImage outimage = new IIOImage(img, null, null);
writer.write(null, outimage, iwp);
writer.dispose();
}
public static boolean writeImageMetadata(IIOMetadata imageMetadata, File target)
throws IOException {
Iterator writers =
ImageIO.getImageWritersBySuffix(StringHelper.getFileExtension(target.getName()));
if (!writers.hasNext()) {
return false;
} else {
ImageWriter writer = (ImageWriter) writers.next();
writer.setOutput(new FileImageOutputStream(target));
BufferedImage image = ImageIO.read(target);
writer.write(null, new IIOImage(image, null, imageMetadata), null);
return true;
}
}
private void jButton3ActionPerformed(
final ActionEvent evt) { // GEN-FIRST:event_jButton3ActionPerformed
try {
BufferedImage image = (BufferedImage) guiMap2D.getCanvas().getSnapShot();
Object output0 = new File("temp0.png");
Object output1 = new File("temp1.png");
final Iterator<ImageWriter> writers = ImageIO.getImageWritersByMIMEType("image/png");
while (writers.hasNext()) {
final ImageWriter writer = writers.next();
final ImageWriterSpi spi = writer.getOriginatingProvider();
if (spi.canEncodeImage(image)) {
ImageOutputStream stream = null;
if (!isValidType(spi.getOutputTypes(), output0)) {
stream = ImageIO.createImageOutputStream(output0);
output0 = stream;
stream = ImageIO.createImageOutputStream(output1);
output1 = stream;
}
ImageWriteParam iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(0);
IIOImage iimage = new IIOImage(image, null, null);
writer.setOutput(output0);
writer.write(null, iimage, iwp);
writer.dispose();
iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(1);
iimage = new IIOImage(image, null, null);
writer.setOutput(output1);
writer.write(null, iimage, iwp);
writer.dispose();
if (output0 != null) {
((ImageOutputStream) output0).close();
((ImageOutputStream) output1).close();
}
return;
}
}
} catch (Exception rx) {
rx.printStackTrace();
}
} // GEN-LAST:event_jButton3ActionPerformed
public static void writeJPEG(BufferedImage input, String name) throws IOException {
Iterator iter = ImageIO.getImageWritersByFormatName("JPG");
if (iter.hasNext()) {
ImageWriter writer = (ImageWriter) iter.next();
ImageWriteParam iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(0.95f);
File outFile = new File(name);
FileImageOutputStream output = new FileImageOutputStream(outFile);
writer.setOutput(output);
IIOImage image = new IIOImage(input, null, null);
writer.write(null, image, iwp);
output.close();
}
}
/**
* Returns <code>true</code> if the <code>ImageWriter</code> object passed in is an instance of
* the <code>ImageWriter</code> associated with this service provider.
*
* @param writer an <code>ImageWriter</code> instance.
* @return <code>true</code> if <code>writer</code> is recognized
* @exception IllegalArgumentException if <code>writer</code> is <code>null</code>.
*/
public boolean isOwnWriter(ImageWriter writer) {
if (writer == null) {
throw new IllegalArgumentException("writer == null!");
}
String name = writer.getClass().getName();
return name.equals(pluginClassName);
}
/**
* reduce the quality of an image.
*
* @param image the original image
* @param quality quality
* @param output data stream of the quality reduced image
*/
public void reduceImageQuality(BufferedImage image, float quality, OutputStream output) {
ImageWriter encoder = (ImageWriter) ImageIO.getImageWritersByFormatName("JPEG").next();
JPEGImageWriteParam param = new JPEGImageWriteParam(null);
quality = Math.max(0, Math.min(quality, 100));
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(quality / 100.0f);
encoder.setOutput(output);
try {
encoder.write((IIOMetadata) null, new IIOImage(image, null, null), param);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private static byte[] toPng(BufferedImage bufferedImage) throws IOException {
ImageWriter imageWriter = getPngImageWriter();
try {
// set quality
ImageWriteParam imageWriteParam = imageWriter.getDefaultWriteParam();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageOutputStream imageOutputStream = ImageIO.createImageOutputStream(byteArrayOutputStream);
imageWriter.setOutput(imageOutputStream);
IIOImage iioImage = new IIOImage(bufferedImage, null, null);
imageWriter.write(null, iioImage, imageWriteParam);
return (byteArrayOutputStream.toByteArray());
} finally {
imageWriter.dispose();
}
}
/** Cleans this {@link GrassBinaryImageWriter}. */
public void dispose() {
try {
rasterWriter.close();
} catch (Exception e) {
e.printStackTrace();
}
super.dispose();
}
public void compressJpegFile(
File infile, File outfile, float compressionQuality, int widthCanvas, int heightCanvas)
throws IOException {
// Retrieve jpg image to be compressed
BufferedImage rendImage = ImageIO.read(infile);
widthFile = rendImage.getWidth();
heightFile = rendImage.getHeight();
double aspectRatioCanvas = widthCanvas / heightCanvas;
double aspectRatioFile = widthFile / heightFile;
widthFile = widthCanvas;
heightFile = widthCanvas / aspectRatioFile;
if (heightFile > heightCanvas) {
heightFile = heightCanvas;
widthFile = heightCanvas * aspectRatioFile;
}
this.width = (int) widthFile;
this.height = (int) heightFile;
ImageTypeSpecifier its = ImageTypeSpecifier.createFromRenderedImage(rendImage);
BufferedImage outImage = its.createBufferedImage(width, height);
Graphics2D graphics2D = outImage.createGraphics();
graphics2D.setRenderingHint(
RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
// graphics2D.drawRenderedImage(rendImage, new AffineTransform());
graphics2D.drawImage(rendImage, 0, 0, width, height, null);
// Find a jpeg writer
ImageWriter writer = null;
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
if (iter.hasNext()) {
writer = (ImageWriter) iter.next();
}
// Prepare output file
ImageOutputStream ios = ImageIO.createImageOutputStream(outfile);
writer.setOutput(ios);
// Set the compression quality
ImageWriteParam iwparam = new JPEGImageWriteParam(Locale.getDefault());
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setCompressionQuality(compressionQuality);
// Write the image
writer.write(null, new IIOImage(outImage, null, null), iwparam);
// infile.delete();
// Cleanup
ios.flush();
writer.dispose();
ios.close();
// return
}
public void setOutput(Object output) {
super.setOutput(output); // validates output
if (output != null) {
if (!(output instanceof ImageOutputStream))
throw new IllegalArgumentException(I18N.getString("WBMPImageWriter"));
this.stream = (ImageOutputStream) output;
} else this.stream = null;
}
public void initialize() {
if (log.isTraceEnabled()) {
String s = "Available JPEG image writers:";
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpeg");
while (writers.hasNext()) {
ImageWriter w = writers.next();
s += "\n\t" + w.getClass().getName();
}
log.trace(s);
}
jpegImageWriter = ImageIO.getImageWritersByFormatName("jpeg").next();
if (jpegImageWriter == null)
throw new NullPointerException("Unable to create a JPEG image writer");
jpegImageWriter.addIIOWriteWarningListener(ImageWriterWarningListener.INSTANCE);
log.debug("Used JPEG image writer: " + jpegImageWriter.getClass().getName());
iwp = jpegImageWriter.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(jpegCompressionLevel);
}
public void processImage(BufferedImage image, OutputStream out) throws IOException {
if (image.getColorModel().hasAlpha()) {
// Javas JPEG writes has a bug when the image has alpha transparency
// see http://stackoverflow.com/questions/4386446/problem-using-imageio-write-jpg-file
BufferedImage imageRGB =
new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
Graphics2D g = imageRGB.createGraphics();
g.drawImage(image, null, 0, 0);
g.dispose();
image = imageRGB;
}
ImageOutputStream imageOut = ImageIO.createImageOutputStream(out);
jpegImageWriter.setOutput(imageOut);
IIOImage ioImage = new IIOImage(image, null, null);
jpegImageWriter.write(null, ioImage, iwp);
}
/**
* Returns the default write parameters for encoding the image.
*
* @param iiowriter The IIO ImageWriter that will be used
* @param image the image to be encoded
* @param params the parameters for this writer instance
* @return the IIO ImageWriteParam instance
*/
protected ImageWriteParam getDefaultWriteParam(
javax.imageio.ImageWriter iiowriter, RenderedImage image, ImageWriterParams params) {
ImageWriteParam param = iiowriter.getDefaultWriteParam();
System.err.println("Param: " + params);
if ((params != null) && (params.getCompressionMethod() != null)) {
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionType(params.getCompressionMethod());
}
return param;
}
public static byte[] getImageBytes(Image image, String type) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
BufferedImage bufImage = convertToBufferedImage(image);
ImageWriter writer = null;
Iterator i = ImageIO.getImageWritersByMIMEType(type);
if (i.hasNext()) {
writer = (ImageWriter) i.next();
}
if (writer != null) {
ImageOutputStream stream = null;
stream = ImageIO.createImageOutputStream(baos);
writer.setOutput(stream);
writer.write(bufImage);
stream.close();
return baos.toByteArray();
}
return null;
}
public static boolean compressPic(String srcFilePath, String descFilePath) {
File file = null;
BufferedImage src = null;
FileOutputStream out = null;
ImageWriter imgWrier;
ImageWriteParam imgWriteParams;
// 指定写图片的方式为 jpg
imgWrier = ImageIO.getImageWritersByFormatName("jpg").next();
imgWriteParams = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(null);
// 要使用压缩，必须指定压缩方式为MODE_EXPLICIT
imgWriteParams.setCompressionMode(imgWriteParams.MODE_EXPLICIT);
// 这里指定压缩的程度，参数qality是取值0~1范围内，
imgWriteParams.setCompressionQuality((float) 0.1);
imgWriteParams.setProgressiveMode(imgWriteParams.MODE_DISABLED);
ColorModel colorModel = ColorModel.getRGBdefault();
// 指定压缩时使用的色彩模式
imgWriteParams.setDestinationType(
new javax.imageio.ImageTypeSpecifier(
colorModel, colorModel.createCompatibleSampleModel(16, 16)));
try {
if (StringUtils.isBlank(srcFilePath)) {
return false;
} else {
file = new File(srcFilePath);
src = ImageIO.read(file);
out = new FileOutputStream(descFilePath);
imgWrier.reset();
// 必须先指定 out值，才能调用write方法, ImageOutputStream可以通过任何 OutputStream构造
imgWrier.setOutput(ImageIO.createImageOutputStream(out));
// 调用write方法，就可以向输入流写图片
imgWrier.write(null, new IIOImage(src, null, null), imgWriteParams);
out.flush();
out.close();
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}