Example usage for javax.imageio ImageReader getWidth

Introduction

In this page you can find the example usage for javax.imageio ImageReader getWidth.

Prototype

public abstract int getWidth(int imageIndex) throws IOException;

Source Link

Document

Returns the width in pixels of the given image within the input source.

Usage

From source file:org.jimcat.services.imagemanager.ImageUtil.java

/**
 * use this methode to load an image from a given byte array
 * /*from  w w  w . j a  v  a  2 s .  co  m*/
 * @param data -
 *            the byte array containing an encoded image
 * @param quality
 *            the rendering quality
 * @return - a Buffered Image containing image. Its size is limited by
 *         SOURCE_BOUNDING_BOX constant
 * @throws IOException -
 *             if something goes wrong
 */
public static BufferedImage loadImage(byte[] data, ImageQuality quality) throws IOException {

    // read first element
    ImageReader reader = getReaderForImage(data);

    // get image dimension and calculate resulting image size
    int width = reader.getWidth(0);
    int height = reader.getHeight(0);
    Dimension size = getScaledDimension(width, height, SOURCE_BOUNDING_BOX, false);

    // performe read
    BufferedImage bi = null;
    try {
        if (USE_TILES) {
            // if image is smaller than a tile
            if (width <= IMAGE_TILE_SIZE.width && height <= IMAGE_TILE_SIZE.height) {
                bi = reader.read(0);
            } else {
                // prepaire reader
                ImageReadParam param = reader.getDefaultReadParam();

                // so image is bigger than a tile
                // a) check if reader supports source scaling
                if (param.canSetSourceRenderSize()) {
                    // fine => do it so
                    param.setSourceRenderSize(size);
                    bi = reader.read(0, param);
                } else {
                    // so, scaling has to be done by hand
                    bi = loadImageWithTiles(reader, size, quality);
                }
            }
        } else {
            bi = loadImageWithSubSampling(reader, size, quality);
        }
    } finally {
        reader.dispose();
    }
    return bi;
}

---

From source file:org.jimcat.services.imagemanager.ImageUtil.java

/**
 * this methode will load given image using tiles (saving memory)
 * /* w  ww. j  ava2 s.  c  o m*/
 * this strategie is spliting the original image up into smaller parts
 * called tiles. Those tiles are downscaled one by one using given quality.
 * This results int probably best possible quality but may cost a lot of
 * time.
 * 
 * @param reader -
 *            the reader to load image from
 * @param size -
 *            the resulting image size
 * @param quality -
 *            the quality used for necessary rendering
 * @return the image as buffered image
 * @throws IOException
 */
@SuppressWarnings("unused")
private static BufferedImage loadImageWithTiles(ImageReader reader, Dimension size, ImageQuality quality)
        throws IOException {

    // the image buffer used to load tiles
    ImageTypeSpecifier imageSpec = reader.getImageTypes(0).next();
    BufferedImage tile = imageSpec.createBufferedImage(IMAGE_TILE_SIZE.width, IMAGE_TILE_SIZE.height);

    // the image the result is rendered into
    BufferedImage result = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g = result.createGraphics();
    g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, quality.getHint());

    // prepaire image reader parameter
    ImageReadParam param = reader.getDefaultReadParam();
    param.setDestination(tile);

    // count tiles
    int width = reader.getWidth(0);
    int height = reader.getHeight(0);
    int numX = (int) Math.ceil(width / (float) IMAGE_TILE_SIZE.width);
    int numY = (int) Math.ceil(height / (float) IMAGE_TILE_SIZE.height);

    float aspectX = (float) IMAGE_TILE_SIZE.width / width;
    float aspectY = (float) IMAGE_TILE_SIZE.height / height;

    // target tile dimension
    int targetTileWidth = (int) (size.width * aspectX);
    int targetTileHeight = (int) (size.height * aspectY);

    // load tiles
    Rectangle sourceRegion = new Rectangle();
    Rectangle targetRegion = new Rectangle();
    for (int i = 0; i < numX; i++) {
        // line increment
        sourceRegion.x = i * IMAGE_TILE_SIZE.width;
        sourceRegion.width = Math.min(IMAGE_TILE_SIZE.width, width - sourceRegion.x);
        targetRegion.x = i * targetTileWidth;
        targetRegion.width = Math.min(targetTileWidth, size.width - targetRegion.x);
        for (int j = 0; j < numY; j++) {
            // row increment
            sourceRegion.y = j * IMAGE_TILE_SIZE.height;
            sourceRegion.height = Math.min(IMAGE_TILE_SIZE.height, height - sourceRegion.y);
            targetRegion.y = j * targetTileHeight;
            targetRegion.height = Math.min(targetTileHeight, size.height - targetRegion.y);

            // performe read
            param.setSourceRegion(sourceRegion);
            reader.read(0, param);

            // insert into resulting image
            int dx1 = targetRegion.x;
            int dx2 = targetRegion.x + targetRegion.width;
            int dy1 = targetRegion.y;
            int dy2 = targetRegion.y + targetRegion.height;

            g.drawImage(tile, dx1, dy1, dx2, dy2, 0, 0, sourceRegion.width, sourceRegion.height, null);
        }
    }

    // finish drawing
    g.dispose();

    // return result
    return result;
}

---

From source file:org.jimcat.services.imagemanager.ImageUtil.java

/**
 * this methode will load given image using a subsample rate
 * //from   www .j a  v a  2s . com
 * this strategie is just reading a subset of images lines ans rowes to
 * reduce memory usage and cpu time.
 * 
 * @param reader -
 *            the reader to load image from
 * @param size -
 *            the resulting image size
 * @param quality -
 *            the quality used for necessary rendering
 * @return the image as buffered image
 * @throws IOException
 */
private static BufferedImage loadImageWithSubSampling(ImageReader reader, Dimension size, ImageQuality quality)
        throws IOException {

    // prepaire image reader parameter
    ImageReadParam param = reader.getDefaultReadParam();

    // calculate subsampling values
    int width = reader.getWidth(0);
    int height = reader.getHeight(0);
    int rateX = width / size.width;
    int rateY = height / size.height;
    param.setSourceSubsampling(rateX, rateY, 0, 0);

    // load image with subsamples
    BufferedImage img = reader.read(0, param);

    // scale to final size
    BufferedImage result = getScaledInstance(img, size, quality);

    // return result
    return result;
}

---

From source file:org.jimcat.services.imagemanager.ImageUtil.java

/**
 * get the dimension of the image stored inside the given array
 * // w  w w . j a  v  a  2s  . c om
 * @param image
 * @return the image dimension
 * @throws IOException
 */
private static Dimension getImageDimension(byte image[]) throws IOException {
    ImageReader reader = getReaderForImage(image);
    return new Dimension(reader.getWidth(0), reader.getHeight(0));
}

---

From source file:org.medici.bia.controller.manuscriptviewer.IIPImageServerController.java

/**
 * This method return image and tile information.
 * /*  ww w  . j  a v a2  s  . c om*/
 * EXAMPLE OUTPUT : IIP:1.0 Max-size:1832 2448 Tile-size:128 128
 * Resolution-number:6
 * 
 * @param httpServletRequest
 * @param response
 * 
 */
private void generateInformationsTiledImage(HttpServletRequest httpServletRequest,
        HttpServletResponse httpServletResponse) {
    File imageFile = new File(ApplicationPropertyManager.getApplicationProperty("iipimage.image.path")
            + httpServletRequest.getParameter("FIF"));
    ImageInputStream imageInputStream = null;
    Integer imageWidth = new Integer(0);
    Integer imageHeight = new Integer(0);
    Integer tileWidth = new Integer(0);
    Integer tileHeight = new Integer(0);
    Integer resolutionNumber = new Integer(0);

    try {
        if (imageFile.canRead()) {
            // Reading complete tiff information
            imageInputStream = ImageIO.createImageInputStream(imageFile);
        } else {
            logger.error("File " + imageFile.toString() + " is not present on filesystem. ");
            imageFile = new File(ApplicationPropertyManager.getApplicationProperty("iipimage.image.path")
                    + ApplicationPropertyManager.getApplicationProperty("iipimage.image.notavailable"));
            if (imageFile.canRead()) {
                // Reading complete tiff information
                imageInputStream = ImageIO.createImageInputStream(imageFile);
            } else {
                logger.error("File " + imageFile.toString() + " is not present on filesystem. ");
            }
        }
        if (imageInputStream != null) {
            Iterator<ImageReader> readers = ImageIO.getImageReaders(imageInputStream);
            if (readers.hasNext()) {
                ImageReader reader = readers.next();
                reader.setInput(imageInputStream, false, true);
                tileWidth = reader.getTileWidth(0);
                tileHeight = reader.getTileHeight(0);
                imageWidth = reader.getWidth(0);
                imageHeight = reader.getHeight(0);
                // Last level is not readable, I don't know why but i remove
                // this
                resolutionNumber = reader.getNumImages(true);
            }
        }
    } catch (IOException ioException) {
        logger.debug(ioException);
    } finally {
        try {
            if (imageInputStream != null) {
                imageInputStream.close();
            }
        } catch (IOException ioException) {
        }

        try {
            httpServletResponse.setContentType("text/plain");
            ServletOutputStream servletOutputStream = httpServletResponse.getOutputStream();
            servletOutputStream.println("IIP:1.0");
            servletOutputStream.println("Max-size:" + imageWidth + " " + imageHeight);
            servletOutputStream.println("Tile-size:" + tileWidth + " " + tileHeight);
            servletOutputStream.println("Resolution-number:" + resolutionNumber);
            servletOutputStream.println("");
            httpServletResponse.getOutputStream().flush();
        } catch (IOException ioException) {
            logger.error(ioException);
        }
    }
}

---

From source file:org.medici.bia.controller.manuscriptviewer.IIPImageServerController.java

/**
 * /* w ww.j  ava2  s.co  m*/
 * @param fileName
 * @param pageImage
 * @param tileNumber
 * @param xCoordinate
 * @param yCoordinate
 * @param httpServletResponse
 */
@SuppressWarnings("unused")
private void generateTiledImage(String fileName, Integer pageImage, Integer tileNumber, Integer xCoordinate,
        Integer yCoordinate, HttpServletResponse httpServletResponse) {
    File imageFile = new File(
            ApplicationPropertyManager.getApplicationProperty("iipimage.image.path") + fileName);
    Integer imageWidth = new Integer(0);
    Integer imageHeight = new Integer(0);
    Integer tileWidth = new Integer(0);
    Integer tileHeight = new Integer(0);
    Integer resolutionNumber = new Integer(0);
    Integer convertedPageImage = new Integer(0);

    ImageInputStream imageInputStream = null;
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    InputStream inputStream = null;

    try {
        if (imageFile.canRead()) {
            // Reading complete tiff information
            imageInputStream = ImageIO.createImageInputStream(imageFile);
        } else {
            logger.error("File " + imageFile.toString() + " is not present on filesystem. ");
            imageFile = new File(ApplicationPropertyManager.getApplicationProperty("iipimage.image.path")
                    + ApplicationPropertyManager.getApplicationProperty("iipimage.image.notavailable"));
            if (imageFile.canRead()) {
                // Reading complete tiff information
                imageInputStream = ImageIO.createImageInputStream(imageFile);
            } else {
                logger.error("File " + imageFile.toString() + " is not present on filesystem. ");
            }
        }

        if (imageInputStream != null) {
            Iterator<ImageReader> readers = ImageIO.getImageReaders(imageInputStream);
            if (readers.hasNext()) {
                ImageReader reader = readers.next();
                reader.setInput(imageInputStream, false, true);
                tileWidth = reader.getTileWidth(0);
                tileHeight = reader.getTileHeight(0);
                imageWidth = reader.getWidth(0);
                imageHeight = reader.getHeight(0);
                // Last level is not readable, I don't know why but i remove
                // this
                resolutionNumber = reader.getNumImages(true) - 1;
                // Calculate of image position, final -1 is beacause index
                // start from 0 and not from 1
                convertedPageImage = resolutionNumber - pageImage;
                // We read our specific tile
                ImageReadParam param = reader.getDefaultReadParam();
                param.setSourceRegion(
                        new Rectangle(new Point(xCoordinate * tileWidth, yCoordinate * tileHeight),
                                new Dimension(tileWidth, tileHeight)));
                BufferedImage subImage = reader.read(convertedPageImage, param);
                // preparing image for output
                ImageIO.write(subImage, "jpeg", byteArrayOutputStream);
                inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
                // writing image to output
                httpServletResponse.setContentType("image/jpeg");
                IOUtils.copy(inputStream, httpServletResponse.getOutputStream());

                // Flushing request
                httpServletResponse.getOutputStream().flush();
            }
        } else {
            logger.error("File " + imageFile.toString() + " is not present on filesystem.");
        }
    } catch (IOException ioException) {
        logger.error(ioException);
    } finally {
        try {
            if (inputStream != null) {
                inputStream.close();
            }
        } catch (IOException ioException) {
        }
        try {
            if (byteArrayOutputStream != null) {
                byteArrayOutputStream.close();
            }
        } catch (IOException ioException) {
        }
        try {
            if (imageInputStream != null) {
                imageInputStream.close();
            }
        } catch (IOException ioException) {
        }
    }
}

---

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

private Size getImageSize(VFSLeaf media, String suffix) {
    Size result = null;//from w  ww. j av  a 2s . co  m
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    if (iter.hasNext()) {
        ImageInputStream stream = null;
        InputStream mediaStream = null;
        ImageReader reader = iter.next();
        try {
            mediaStream = media.getInputStream();
            if (mediaStream != null) {
                stream = new MemoryCacheImageInputStream(mediaStream);
                reader.setInput(stream);
                int readerMinIndex = reader.getMinIndex();
                int width = reader.getWidth(readerMinIndex);
                int height = reader.getHeight(readerMinIndex);
                result = new Size(width, height, 0, 0, false);
            }
        } catch (IOException e) {
            log.error(e.getMessage());
        } finally {
            IOUtils.closeQuietly(stream);
            IOUtils.closeQuietly(mediaStream);
            reader.dispose();
        }
    } else {
        log.error("No reader found for given format: " + suffix);
    }
    return result;
}

---

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

private static SizeAndBufferedImage calcScaledSize(ImageInputStream stream, String suffix, int maxWidth,
        int maxHeight, boolean fill) {
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    if (iter.hasNext()) {
        ImageReader reader = iter.next();
        try {/*from  w w w.jav  a  2s .com*/
            reader.setInput(stream, true, true);
            int width = reader.getWidth(reader.getMinIndex());
            int height = reader.getHeight(reader.getMinIndex());
            Size size = new Size(width, height, false);
            Size scaledSize = computeScaledSize(width, height, maxWidth, maxHeight, fill);
            SizeAndBufferedImage all = new SizeAndBufferedImage(size, scaledSize);

            int readerMinIndex = reader.getMinIndex();
            ImageReadParam param = reader.getDefaultReadParam();
            Iterator<ImageTypeSpecifier> imageTypes = reader.getImageTypes(0);
            while (imageTypes.hasNext()) {
                try {
                    ImageTypeSpecifier imageTypeSpecifier = imageTypes.next();
                    int bufferedImageType = imageTypeSpecifier.getBufferedImageType();
                    if (bufferedImageType == BufferedImage.TYPE_BYTE_GRAY) {
                        param.setDestinationType(imageTypeSpecifier);
                    }

                    double memoryKB = (width * height * 4) / 1024d;
                    if (memoryKB > 2000) {// check limit at 20MB
                        double free = Runtime.getRuntime().freeMemory() / 1024d;
                        if (free > memoryKB) {
                            all.setImage(reader.read(readerMinIndex, param));
                        } else {
                            // make sub sampling to save memory
                            int ratio = (int) Math.round(Math.sqrt(memoryKB / free));
                            param.setSourceSubsampling(ratio, ratio, 0, 0);
                            all.setImage(reader.read(readerMinIndex, param));
                        }
                    } else {
                        all.setImage(reader.read(readerMinIndex, param));
                    }
                    return all;
                } catch (IllegalArgumentException e) {
                    log.warn(e.getMessage(), e);
                }
            }
        } catch (IOException e) {
            log.error(e.getMessage(), e);
        } finally {
            reader.dispose();
        }
    } else {
        log.error("No reader found for given format: " + suffix, null);
    }
    return null;
}

---

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

private static SizeAndBufferedImage getImage(ImageInputStream stream, String suffix) {
    Iterator<ImageReader> iter = ImageIO.getImageReadersBySuffix(suffix);
    if (iter.hasNext()) {
        ImageReader reader = iter.next();
        try {//from   ww  w  . j a  va  2s.  c  o  m
            reader.setInput(stream, true, true);
            int width = reader.getWidth(reader.getMinIndex());
            int height = reader.getHeight(reader.getMinIndex());
            Size size = new Size(width, height, false);
            SizeAndBufferedImage all = new SizeAndBufferedImage(size, null);

            int readerMinIndex = reader.getMinIndex();
            ImageReadParam param = reader.getDefaultReadParam();
            Iterator<ImageTypeSpecifier> imageTypes = reader.getImageTypes(0);
            while (imageTypes.hasNext()) {
                try {
                    ImageTypeSpecifier imageTypeSpecifier = imageTypes.next();
                    int bufferedImageType = imageTypeSpecifier.getBufferedImageType();
                    if (bufferedImageType == BufferedImage.TYPE_BYTE_GRAY) {
                        param.setDestinationType(imageTypeSpecifier);
                    }
                    all.setImage(reader.read(readerMinIndex, param));
                    return all;
                } catch (IllegalArgumentException e) {
                    log.warn(e.getMessage(), e);
                }
            }
        } catch (IOException e) {
            log.error(e.getMessage(), e);
        } finally {
            reader.dispose();
        }
    } else {
        log.error("No reader found for given format: " + suffix, null);
    }
    return null;
}

---

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

/**
 * Detects the {@code sourceFile} and returns the size dimension from it.
 * @param sourceFile source image file/*from w w w . ja  v  a  2  s .c o  m*/
 * @return Detects the {@code sourceFile} and returns the size dimension from it
 * @throws IOException if IO exception occurs
 */
public static ImageDimension identifyDimension(File sourceFile) throws IOException {
    ImageDimension dimension = null;
    String extension = FilenameUtils.getExtension(sourceFile.getName());
    Iterator<ImageReader> it = ImageIO.getImageReadersBySuffix(extension);

    if (!it.hasNext()) {
        throw new IllegalArgumentException("Unsupported file name extension: " + sourceFile);
    }

    ImageReader reader = null;

    try {
        reader = getImageReader(sourceFile);
        int width = reader.getWidth(reader.getMinIndex());
        int height = reader.getHeight(reader.getMinIndex());
        dimension = ImageDimension.from(width, height);
    } finally {
        if (reader != null) {
            reader.dispose();
        }
    }

    return dimension;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• »