下面列出了javax.imageio.ImageReader#readAll ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try (ImageInputStream imageInputStream =
ImageIO.createImageInputStream(f)) {
ImageReader r = ImageIO.getImageReaders(imageInputStream).next();
r.setInput(imageInputStream);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static ITXtTest readFrom(File f) {
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
ImageReader r = ImageIO.getImageReaders(iis).next();
r.setInput(iis);
IIOImage dst = r.readAll(0, null);
// look for iTXt node
IIOMetadata m = dst.getMetadata();
Node root = m.getAsTree(m.getNativeMetadataFormatName());
Node n = root.getFirstChild();
while (n != null && !"iTXt".equals(n.getNodeName())) {
n = n.getNextSibling();
}
if (n == null) {
throw new RuntimeException("No iTXt node!");
}
ITXtTest t = ITXtTest.getFromNode((IIOMetadataNode)n);
return t;
} catch (Throwable e) {
throw new RuntimeException("Reading test failed.", e);
}
}
private static List<BufferedImage> loadFromStream(ImageInputStream imageStream) throws IOException {
Iterable<ImageReader> it = () -> ImageIO.getImageReaders(imageStream);
ImageReader reader = StreamSupport.stream(it.spliterator(), false)
.filter(MainPanel::checkGifFormat)
.findFirst()
.orElseThrow(() -> new IOException("Can not read image format!"));
reader.setInput(imageStream, false, false);
List<BufferedImage> list = new ArrayList<>();
for (int i = 0; i < reader.getNumImages(true); i++) {
IIOImage frame = reader.readAll(i, null);
list.add((BufferedImage) frame.getRenderedImage());
}
reader.dispose();
return list;
}
/**
* Gets a list of <code>IIOImage</code> objects for an image file.
*
* @param inputFile input image file. It can be any of the supported
* formats, including TIFF, JPEG, GIF, PNG, BMP, JPEG, and PDF if GPL
* Ghostscript or PDFBox is installed
* @return a list of <code>IIOImage</code> objects
* @throws IOException
*/
public static List<IIOImage> getIIOImageList(File inputFile) throws IOException {
// convert to TIFF if PDF
File imageFile = getImageFile(inputFile);
List<IIOImage> iioImageList = new ArrayList<IIOImage>();
String imageFormat = getImageFileFormat(imageFile);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
if (!readers.hasNext()) {
throw new RuntimeException(JAI_IMAGE_READER_MESSAGE);
}
ImageReader reader = readers.next();
try (ImageInputStream iis = ImageIO.createImageInputStream(imageFile)) {
reader.setInput(iis);
int imageTotal = reader.getNumImages(true);
for (int i = 0; i < imageTotal; i++) {
// IIOImage oimage = new IIOImage(reader.read(i), null, reader.getImageMetadata(i));
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
iioImageList.add(oimage);
}
return iioImageList;
} finally {
if (reader != null) {
reader.dispose();
}
// delete temporary TIFF image for PDF
if (imageFile != null && imageFile.exists() && imageFile != inputFile && imageFile.getName().startsWith("multipage") && imageFile.getName().endsWith(TIFF_EXT)) {
imageFile.delete();
}
}
}
/**
* Performs OCR operation.
*
* @param inputFile an image file
* @param rect the bounding rectangle defines the region of the image to be
* recognized. A rectangle of zero dimension or <code>null</code> indicates
* the whole image.
* @return the recognized text
* @throws TesseractException
*/
@Override
public String doOCR(File inputFile, Rectangle rect) throws TesseractException {
try {
File imageFile = ImageIOHelper.getImageFile(inputFile);
String imageFileFormat = ImageIOHelper.getImageFileFormat(imageFile);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFileFormat);
if (!readers.hasNext()) {
throw new RuntimeException(ImageIOHelper.JAI_IMAGE_READER_MESSAGE);
}
ImageReader reader = readers.next();
StringBuilder result = new StringBuilder();
try (ImageInputStream iis = ImageIO.createImageInputStream(imageFile);) {
reader.setInput(iis);
int imageTotal = reader.getNumImages(true);
init();
setTessVariables();
for (int i = 0; i < imageTotal; i++) {
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
result.append(doOCR(oimage, inputFile.getPath(), rect, i + 1));
}
if (String.valueOf(TRUE).equals(prop.getProperty("tessedit_create_hocr"))) {
result.insert(0, htmlBeginTag).append(htmlEndTag);
}
} finally {
// delete temporary TIFF image for PDF
if (imageFile != null && imageFile.exists() && imageFile != inputFile && imageFile.getName().startsWith("multipage") && imageFile.getName().endsWith(ImageIOHelper.TIFF_EXT)) {
imageFile.delete();
}
reader.dispose();
dispose();
}
return result.toString();
} catch (Exception e) {
logger.error(e.getMessage(), e);
throw new TesseractException(e);
}
}
/**
* Performs OCR operation.
*
* @param inputFile an image file
* @param rect the bounding rectangle defines the region of the image to be
* recognized. A rectangle of zero dimension or <code>null</code> indicates
* the whole image.
* @return the recognized text
* @throws TesseractException
*/
@Override
public String doOCR(File inputFile, Rectangle rect) throws TesseractException {
try {
File imageFile = ImageIOHelper.getImageFile(inputFile);
String imageFileFormat = ImageIOHelper.getImageFileFormat(imageFile);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFileFormat);
if (!readers.hasNext()) {
throw new RuntimeException(ImageIOHelper.JAI_IMAGE_READER_MESSAGE);
}
ImageReader reader = readers.next();
StringBuilder result = new StringBuilder();
try (ImageInputStream iis = ImageIO.createImageInputStream(imageFile);) {
reader.setInput(iis);
int imageTotal = reader.getNumImages(true);
init();
setTessVariables();
for (int i = 0; i < imageTotal; i++) {
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
result.append(doOCR(oimage, inputFile.getPath(), rect, i + 1));
}
if (String.valueOf(TRUE).equals(prop.getProperty("tessedit_create_hocr"))) {
result.insert(0, htmlBeginTag).append(htmlEndTag);
}
} finally {
// delete temporary TIFF image for PDF
if (imageFile != null && imageFile.exists() && imageFile != inputFile && imageFile.getName().startsWith("multipage") && imageFile.getName().endsWith(ImageIOHelper.TIFF_EXT)) {
imageFile.delete();
}
reader.dispose();
dispose();
}
return result.toString();
} catch (Exception e) {
logger.error(e.getMessage(), e);
throw new TesseractException(e);
}
}
/**
* 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
* @param preserve preserve compression mode
* @return a list of TIFF image files
* @throws IOException
*/
public static List<File> createTiffFiles(File imageFile, int index, boolean preserve) throws IOException {
List<File> tiffFiles = new ArrayList<File>();
String imageFormat = getImageFileFormat(imageFile);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
if (!readers.hasNext()) {
throw new RuntimeException(JAI_IMAGE_READER_MESSAGE);
}
ImageReader reader = readers.next();
// Get tiff writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
if (!writers.hasNext()) {
throw new RuntimeException(JAI_IMAGE_WRITER_MESSAGE);
}
ImageWriter writer = writers.next();
try (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);
if (!preserve) {
// not preserve original sizes; decompress
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
}
// 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) {
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
try (ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile)) {
writer.setOutput(ios);
writer.write(streamMetadata, oimage, tiffWriteParam);
tiffFiles.add(tiffFile);
}
}
}
return tiffFiles;
} finally {
if (reader != null) {
reader.dispose();
}
if (writer != null) {
writer.dispose();
}
}
}
/**
* Merges multiple images into one multi-page TIFF image.
*
* @param inputImages an array of image files
* @param outputTiff the output multi-page TIFF file
* @throws IOException
*/
public static void mergeTiff(File[] inputImages, File outputTiff) throws IOException {
if (inputImages.length == 0) {
// if no image
return;
}
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
if (!writers.hasNext()) {
throw new RuntimeException(JAI_IMAGE_WRITER_MESSAGE);
}
ImageWriter writer = writers.next();
//Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
// tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED); // commented out to preserve original sizes
//Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
try (ImageOutputStream ios = ImageIO.createImageOutputStream(outputTiff)) {
writer.setOutput(ios);
boolean firstPage = true;
int index = 1;
for (File inputImage : inputImages) {
String imageFileFormat = getImageFileFormat(inputImage);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFileFormat);
if (!readers.hasNext()) {
throw new RuntimeException(JAI_IMAGE_READER_MESSAGE);
}
ImageReader reader = readers.next();
try (ImageInputStream iis = ImageIO.createImageInputStream(inputImage)) {
reader.setInput(iis);
int imageTotal = reader.getNumImages(true);
for (int i = 0; i < imageTotal; i++) {
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
if (firstPage) {
writer.write(streamMetadata, oimage, tiffWriteParam);
firstPage = false;
} else {
writer.writeInsert(index++, oimage, tiffWriteParam);
}
}
} finally {
if (reader != null) {
reader.dispose();
}
}
}
} finally {
writer.dispose();
}
}
private void read(File f) throws IOException {
ImageReader reader = ImageIO.getImageReadersByFormatName("BMP").next();
ImageInputStream iis =
ImageIO.createImageInputStream(new FileInputStream(f));
reader.setInput(iis);
iio_dst = reader.readAll(0, reader.getDefaultReadParam());
}
private void read(File f) throws IOException {
ImageReader reader = ImageIO.getImageReadersByFormatName("BMP").next();
ImageInputStream iis =
ImageIO.createImageInputStream(new FileInputStream(f));
reader.setInput(iis);
iio_dst = reader.readAll(0, reader.getDefaultReadParam());
}