Examples with PNGImageContent org.knime.core.data.image.png.PNGImageContent used on opensource projects

Example 1 with PNGImageContent

use of org.knime.core.data.image.png.PNGImageContent in project knime-core by knime.

the class HistogramColumn method createPngImageCell.

/**
 * @param histogramData A {@link HistogramModel}.
 * @return The PNG image cell.
 */
private DataCell createPngImageCell(final HistogramModel<?> histogramData, final boolean paintLabels) {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try {
        try {
            BufferedImage image = new BufferedImage(m_width, m_height, BufferedImage.TYPE_4BYTE_ABGR);
            Graphics2D g = image.createGraphics();
            paint(histogramData, paintLabels, g);
            ImageIO.write(image, "png", baos);
        } finally {
            baos.close();
        }
    } catch (IOException e) {
        // Should not happen, all in-memory
        throw new IllegalStateException(e.getMessage(), e);
    }
    return new PNGImageContent(baos.toByteArray()).toImageCell();
}

Example 2 with PNGImageContent

use of org.knime.core.data.image.png.PNGImageContent in project knime-core by knime.

the class ReadPNGFromURLNodeModel method toPNGCell.

/**
 * Read image from URL.
 * @param urlValue The URL
 * @return A new image cell
 * @throws IOException
 * @throws IllegalArgumentException If the image is invalid
 * @see PNGImageContent#PNGImageContent(InputStream)
 */
private DataCell toPNGCell(final String urlValue) throws IOException {
    URL url = new URL(urlValue);
    InputStream in = FileUtil.openStreamWithTimeout(url);
    try {
        PNGImageContent pngImageContent = new PNGImageContent(in);
        return pngImageContent.toImageCell();
    } finally {
        try {
            in.close();
        } catch (IOException ioe) {
        // ignore
        }
    }
}

Example 3 with PNGImageContent

use of org.knime.core.data.image.png.PNGImageContent in project knime-core by knime.

the class ImagePortObject method collectImageContentFactories.

private static Map<String, ImageContentFactory> collectImageContentFactories() {
    IExtensionRegistry registry = Platform.getExtensionRegistry();
    IExtensionPoint point = registry.getExtensionPoint(ImageContentFactory.EXT_POINT_ID);
    if (point == null) {
        LOGGER.error("Invalid extension point: " + ImageContentFactory.EXT_POINT_ID);
        return Collections.emptyMap();
    }
    Map<String, ImageContentFactory> resultList = new HashMap<>();
    for (IConfigurationElement elem : point.getConfigurationElements()) {
        String imageContentCLName = elem.getAttribute(ImageContentFactory.EXT_POINT_ATTR_CLASS_NAME);
        String decl = elem.getDeclaringExtension().getUniqueIdentifier();
        if (imageContentCLName == null || imageContentCLName.isEmpty()) {
            LOGGER.error("The extension '" + decl + "' doesn't provide the required attribute '" + ImageContentFactory.EXT_POINT_ATTR_CLASS_NAME + "' - ignoring it");
            continue;
        }
        ImageContentFactory instance = null;
        try {
            instance = (ImageContentFactory) elem.createExecutableExtension(ImageContentFactory.EXT_POINT_ATTR_CLASS_NAME);
        } catch (Throwable t) {
            LOGGER.error("Problems during initialization of image content factory (with id '" + imageContentCLName + "'.)", t);
            if (decl != null) {
                LOGGER.error("Extension " + decl + " ignored.");
            }
        }
        if (instance != null) {
            // We do not want to add invalid image content impls to this list.
            resultList.put(instance.getImageContentClass().getName(), instance);
        }
    }
    // add the image content implementations from core
    resultList.put(PNGImageContent.class.getName(), new ImageContentFactory() {

        @Override
        public Class<? extends ImageContent> getImageContentClass() {
            return PNGImageContent.class;
        }

        @Override
        public ImageContent create(final InputStream in) throws IOException {
            return new PNGImageContent(in);
        }
    });
    return Collections.unmodifiableMap(resultList);
}

Example 4 with PNGImageContent

use of org.knime.core.data.image.png.PNGImageContent in project knime-core by knime.

the class WritePNGNodeModel method execute.

/**
 * {@inheritDoc}
 */
@Override
protected PortObject[] execute(final PortObject[] inObjects, final ExecutionContext exec) throws Exception {
    String outPath = m_fileOutSettings.getStringValue();
    ImagePortObject imageObj = (ImagePortObject) inObjects[0];
    DataCell imageCellDC = imageObj.toDataCell();
    if (!(imageCellDC instanceof ImageValue)) {
        throw new InvalidSettingsException("Image object does not produce" + " valid image object but " + imageCellDC == null ? null : imageCellDC.getClass().getName());
    }
    // overwrite check done in configure()
    ImageValue v = (ImageValue) imageCellDC;
    ImageContent content = v.getImageContent();
    if (content instanceof PNGImageContent) {
        byte[] bytes = ((PNGImageContent) content).getByteArrayReference();
        ByteArrayInputStream in = new ByteArrayInputStream(bytes);
        FileOutputStream out = new FileOutputStream(new File(outPath));
        FileUtil.copy(in, out);
        in.close();
        out.close();
    } else {
        throw new InvalidSettingsException("Unsupported image type: " + content.getClass().getName() + " (expected PNG)");
    }
    return new PortObject[0];
}

Example 5 with PNGImageContent

use of org.knime.core.data.image.png.PNGImageContent in project knime-core by knime.

the class DecTreeToImageNodeModel method loadInternals.

/**
 * Load internals.
 *
 * @param nodeInternDir The intern node directory to load tree from.
 * @param exec Used to report progress or cancel saving.
 * @throws IOException Always, since this method has not been implemented
 *             yet.
 * @see org.knime.core.node.NodeModel
 *      #loadInternals(java.io.File,ExecutionMonitor)
 */
@Override
protected void loadInternals(final File nodeInternDir, final ExecutionMonitor exec) throws IOException {
    // read the decision tree
    File internalsFile = new File(nodeInternDir, DEC_TREE_FILE_NAME);
    if (!internalsFile.exists()) {
        // file to load internals from not available
        setWarningMessage("Internal model could not be loaded.");
        return;
    }
    BufferedInputStream in2 = new BufferedInputStream(new GZIPInputStream(new FileInputStream(internalsFile)));
    ModelContentRO binModel = ModelContent.loadFromXML(in2);
    try {
        m_decTree = new DecisionTree(binModel);
    } catch (InvalidSettingsException ise) {
        LOGGER.warn("Model (internals) could not be loaded.", ise);
        setWarningMessage("Internal model could not be loaded.");
    }
    exec.setProgress(0.5);
    // read image content
    File f = new File(nodeInternDir, IMAGE_FILE_NAME);
    ObjectInputStream in = new ObjectInputStream(new FileInputStream(f));
    try {
        m_imageContent = new PNGImageContent(in);
    } catch (Exception e) {
        in.close();
        LOGGER.warn("Model (internals) could not be loaded.", e);
        setWarningMessage("Internal model could not be loaded.");
    }
    in.close();
    exec.setProgress(1.0);
}