/** * Reads image meta data. * * @param oimage * @return */ public static Map<String, String> readImageData(IIOImage oimage) { Map<String, String> dict = new HashMap<String, String>(); IIOMetadata imageMetadata = oimage.getMetadata(); if (imageMetadata != null) { IIOMetadataNode dimNode = (IIOMetadataNode) imageMetadata.getAsTree("javax_imageio_1.0"); NodeList nodes = dimNode.getElementsByTagName("HorizontalPixelSize"); int dpiX; if (nodes.getLength() > 0) { float dpcWidth = Float.parseFloat(nodes.item(0).getAttributes().item(0).getNodeValue()); dpiX = (int) Math.round(25.4f / dpcWidth); } else { dpiX = Toolkit.getDefaultToolkit().getScreenResolution(); } dict.put("dpiX", String.valueOf(dpiX)); nodes = dimNode.getElementsByTagName("VerticalPixelSize"); int dpiY; if (nodes.getLength() > 0) { float dpcHeight = Float.parseFloat(nodes.item(0).getAttributes().item(0).getNodeValue()); dpiY = (int) Math.round(25.4f / dpcHeight); } else { dpiY = Toolkit.getDefaultToolkit().getScreenResolution(); } dict.put("dpiY", String.valueOf(dpiY)); } return dict; }