/*
* Copyright (c) 2008 Los Alamos National Security, LLC.
*
* Los Alamos National Laboratory
* Research Library
* Digital Library Research & Prototyping Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package gov.lanl.adore.djatoka.io.reader;
import gov.lanl.adore.djatoka.io.FormatIOException;
import gov.lanl.adore.djatoka.io.IReader;
import gov.lanl.adore.djatoka.util.IOUtils;
import ij.ImagePlus;
import ij.io.Opener;
import ij.process.ImageProcessor;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.InputStream;
import net.sf.ij.jaiio.JAIReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Use ImageJ API to read image InputStream or image file path.
*
* @author Ryan Chute
*/
public class ImageJReader implements IReader {
private static final Logger LOGGER = LoggerFactory.getLogger(ImageJReader.class);
/**
* Returns a BufferedImage instance for provided InputStream
*
* @param input an InputStream consisting of an image bitstream
* @return a BufferedImage instance for source image InputStream
* @throws FormatIOException
*/
public BufferedImage open(InputStream input) throws FormatIOException {
Opener o = new Opener();
BufferedImage bi = null;
// Most of the time we're dealing with TIF so try direct
ImagePlus imp = o.openTiff(input, "tif");
// Otherwise, we'll just stay in ImageJ but just provide a file path
if (imp == null) {
if (LOGGER.isInfoEnabled()) {
LOGGER.info("Creating temp image");
}
File path = IOUtils.createTempImage(input);
bi = open(path.getAbsolutePath());
if (!path.delete() && LOGGER.isWarnEnabled()) {
LOGGER.warn("File not deleted: {}", path);
}
} else {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Opening TIFF file");
}
bi = open(imp);
}
return bi;
}
/**
* Returns a BufferedImage instance for provided image file path
*
* @param input absolute file path for image file
* @return a BufferedImage instance for source image file
* @throws FormatIOException
*/
public BufferedImage open(String input) throws FormatIOException {
ImagePlus ip;
try {
ip = JAIReader.read(new File(input))[0];
} catch (Exception e) {
LOGGER.error(e.getMessage(), e);
throw new FormatIOException(e.getMessage(), e);
}
return open(ip);
}
/**
* Internal ImagePlus processing to populate BufferedIMage using Graphics objects
*
* @param imp an ImageJ ImagePlus object
* @return a BufferedImage of type BufferedImage.TYPE_3BYTE_BGR
* @throws FormatIOException
*/
private BufferedImage open(ImagePlus imp) throws FormatIOException {
if (imp == null) {
LOGGER.error("Null ImagePlus Object.");
throw new FormatIOException("Null ImagePlus Object.");
}
ImageProcessor ip = imp.getProcessor();
int width = ip.getWidth();
int height = ip.getHeight();
Image img = ip.createImage();
imp.flush();
imp = null;
ip = null;
BufferedImage bImg = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);
Graphics g = bImg.getGraphics();
g.drawImage(img, 0, 0, null);
img.flush();
img = null;
g.dispose();
g = null;
return bImg;
}
}