/*
* 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.util;
import ij.ImagePlus;
import ij.io.Opener;
import ij.process.ImageProcessor;
import javax.media.jai.JAI;
import javax.media.jai.PlanarImage;
/**
* Image Information Utility used to obtain width and height information.
* This util is useful when processing images using external compression
* applications, such as Kakadu JPEG 2000 kdu_compress. The image to be
* compressed is opened by either ImageJ or JAI and determines dimensions.
* JAI is better with TIFF files and and file extensions are used to
* determine which API will be used to resolve dimensions.
* @author Ryan Chute
*
*/
public class ImageRecordUtils {
/**
* Return an ImageRecord containing the images pixel dimensions.
* @param file absolute file path to image
* @return ImageRecord containing the images pixel dimensions
*/
public static ImageRecord getImageDimensions(String file) {
ImageRecord dim = null;
// try JAI
dim = setUsingJAI(file);
// if that fails, try ImageJ
if (dim == null)
dim = setUsingImageJ(file);
return dim;
}
private static ImageRecord setUsingImageJ(String file) {
ImageRecord dim = new ImageRecord(file);
Opener o = new Opener();
ImagePlus imp = o.openImage(file);
if (imp == null)
return null;
ImageProcessor ip = imp.getProcessor();
dim.setWidth(ip.getWidth());
dim.setHeight(ip.getHeight());
ip = null;
return dim;
}
private static ImageRecord setUsingJAI(String file) {
ImageRecord dim = new ImageRecord(file);
PlanarImage pi = JAI.create("fileload", file);
dim.setWidth(pi.getWidth());
dim.setHeight(pi.getHeight());
pi.dispose();
pi = null;
return dim;
}
}