List of usage examples for javax.imageio IIOImage getMetadata
public IIOMetadata getMetadata()
From source file:de.unigoettingen.sub.commons.contentlib.imagelib.JpegInterpreter.java
/************************************************************************************ * Constructor for {@link JpegInterpreter} to read an jpeg image from given {@link InputStream} * /*from w w w . j a v a 2 s . com*/ * @param inStream {@link InputStream} * @throws ImageInterpreterException ************************************************************************************/ public JpegInterpreter(InputStream inStream) throws ImageInterpreterException { InputStream inputStream = null; byte imagebytes[] = null; // read the stream and store it in a byte array try { this.readImageStream(inStream); imagebytes = this.getImageByteStream(); if (inStream != null) { inStream.close(); } } catch (IOException e) { LOGGER.error("Failed to close input stream", e); } // // Read image bytes into new stream try { inputStream = new ByteArraySeekableStream(imagebytes); } catch (IOException e1) { LOGGER.error("Can't transform the image's byte array to stream"); ImageInterpreterException iie = new ImageInterpreterException( "Can't transform the image's byte array to stream"); throw iie; } // // read the stream Node domNode = null; try { IIOImage image = createImage(inputStream, 0); if ((image == null) || (image.getRenderedImage() == null)) { LOGGER.error("Failed to read image from input stream. Aborting!"); ImageInterpreterException iie = new ImageInterpreterException( "Failed to read image from input stream. Aborting!"); throw iie; } this.renderedimage = image.getRenderedImage(); IIOMetadata metadata = image.getMetadata(); if (metadata != null) { String formatName = metadata.getNativeMetadataFormatName(); domNode = metadata.getAsTree(formatName); if ((domNode == null) || (domNode.getChildNodes() == null)) { metadata = null; } } if (metadata == null) { LOGGER.error("Failed to read metadata from input stream. Using default values"); xResolution = defaultXResolution; yResolution = defaultYResolution; width = this.renderedimage.getWidth(); height = this.renderedimage.getHeight(); samplesPerPixel = 1; return; } } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { LOGGER.error("Failed to close input stream"); } } } // // get new metadata - this is not very sophisticated parsing the DOM // tree - needs to be replaced by // XPATH expressions - see above String height_str = this.getNumLines(domNode); if (height_str != null) { this.height = Integer.parseInt(height_str); } String width_str = this.getSamplesPerLine(domNode); if (width_str != null) { this.width = Integer.parseInt(width_str); } String resunits = this.getResUnits(domNode); int resunits_int = 1; // default is DPI // if resunits==1 than it is dpi, // if resunits==2 than it is dpcm if (resunits != null) { resunits_int = Integer.parseInt(resunits); } String xres_str = this.getXdensity(domNode); if (xres_str != null) { this.xResolution = Integer.parseInt(xres_str); if (resunits_int == 2) { this.xResolution = this.xResolution * 2.54f; // d/inch = d/cm * cm/inch // this.xResolution = this.xResolution / 2.54f; } } String yres_str = this.getYdensity(domNode); if (yres_str != null) { this.yResolution = Integer.parseInt(yres_str); if (resunits_int == 2) { this.yResolution = this.yResolution * 2.54f; // d/inch = d/cm * cm/inch // this.yResolution = this.yResolution / 2.54f; } } if ((resunits == null) || (resunits_int == 0) || (xResolution <= 1.0) || (yResolution <= 1.0)) { xResolution = defaultXResolution; yResolution = defaultYResolution; } String colordepth_str = this.getSamplePrecision(domNode); if (colordepth_str != null) { this.colorDepth = Integer.parseInt(colordepth_str); } String samplesperpixel_str = this.getNumFrames(domNode); if (samplesperpixel_str != null) { this.samplesPerPixel = Integer.parseInt(samplesperpixel_str); } }
From source file:ch5ImageWriter.java
/** * write out the output image specified by index imageIndex using the * parameters specified by the ImageWriteParam object param *//*from w w w.j a va2s . c om*/ public void write(IIOMetadata metadata, IIOImage iioimage, ImageWriteParam param) { Node root = null; Node dimensionsElementNode = null; if (iioimage.getRenderedImage() != null) raster = iioimage.getRenderedImage().getData(); else raster = iioimage.getRaster(); /* * since this format allows you to write multiple images, the * streamMetadataWritten variable makes sure the stream metadata is * written only once */ if (streamMetadataWritten == false) { if (metadata == null) metadata = getDefaultStreamMetadata(param); root = metadata.getAsTree("ch5.imageio.ch5stream_1.00"); dimensionsElementNode = root.getFirstChild(); Node numberImagesAttributeNode = dimensionsElementNode.getAttributes().getNamedItem("numberImages"); String numberImages = numberImagesAttributeNode.getNodeValue(); try { ios.writeBytes("5\n"); ios.writeBytes(numberImages); ios.flush(); } catch (IOException ioe) { System.err.println("IOException " + ioe.getMessage()); } streamMetadataWritten = true; } String widthString; String heightString; IIOMetadata imageMetadata = (ch5ImageMetadata) iioimage.getMetadata(); /* * don't really need image metadata object here since raster knows * necessary information */ if (imageMetadata == null) imageMetadata = getDefaultImageMetadata(null, param); root = imageMetadata.getAsTree("ch5.imageio.ch5image_1.00"); dimensionsElementNode = root.getFirstChild(); Node widthAttributeNode = dimensionsElementNode.getAttributes().getNamedItem("imageWidth"); widthString = widthAttributeNode.getNodeValue(); Node heightAttributeNode = dimensionsElementNode.getAttributes().getNamedItem("imageHeight"); heightString = heightAttributeNode.getNodeValue(); int sourceWidth = Integer.parseInt(widthString); int sourceHeight = Integer.parseInt(heightString); int destinationWidth = -1; int destinationHeight = -1; int sourceRegionWidth = -1; int sourceRegionHeight = -1; int sourceRegionXOffset = -1; int sourceRegionYOffset = -1; int xSubsamplingFactor = -1; int ySubsamplingFactor = -1; if (param == null) param = getDefaultWriteParam(); /* * get Rectangle object which will be used to clip the source image's * dimensions. */ Rectangle sourceRegion = param.getSourceRegion(); if (sourceRegion != null) { sourceRegionWidth = (int) sourceRegion.getWidth(); sourceRegionHeight = (int) sourceRegion.getHeight(); sourceRegionXOffset = (int) sourceRegion.getX(); sourceRegionYOffset = (int) sourceRegion.getY(); /* * correct for overextended source regions */ if (sourceRegionXOffset + sourceRegionWidth > sourceWidth) destinationWidth = sourceWidth - sourceRegionXOffset; else destinationWidth = sourceRegionWidth; if (sourceRegionYOffset + sourceRegionHeight > sourceHeight) destinationHeight = sourceHeight - sourceRegionYOffset; else destinationHeight = sourceRegionHeight; } else { destinationWidth = sourceWidth; destinationHeight = sourceHeight; sourceRegionXOffset = sourceRegionYOffset = 0; } /* * get subsampling factors */ xSubsamplingFactor = param.getSourceXSubsampling(); ySubsamplingFactor = param.getSourceYSubsampling(); destinationWidth = (destinationWidth - 1) / xSubsamplingFactor + 1; destinationHeight = (destinationHeight - 1) / ySubsamplingFactor + 1; byte[] sourceBuffer; byte[] destinationBuffer = new byte[destinationWidth]; try { ios.writeBytes(new String("\n")); ios.writeBytes(new String(destinationWidth + "\n")); ios.writeBytes(new String(destinationHeight + "\n")); int jj; int index; for (int j = 0; j < sourceWidth; j++) { sourceBuffer = (byte[]) raster.getDataElements(0, j, sourceWidth, 1, null); jj = j - sourceRegionYOffset; if (jj % ySubsamplingFactor == 0) { jj /= ySubsamplingFactor; if ((jj >= 0) && (jj < destinationHeight)) { for (int i = 0; i < destinationWidth; i++) { index = sourceRegionXOffset + i * xSubsamplingFactor; destinationBuffer[i] = sourceBuffer[index]; } ios.write(destinationBuffer, 0, destinationWidth); ios.flush(); } } } } catch (IOException e) { System.err.println("IOException: " + e.getMessage()); } }