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https://issues.apache.org/jira/browse/IMAGING-170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14804468#comment-14804468
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Gary Lucas commented on IMAGING-170:
------------------------------------
This change turned out to be fairly easy. I added the predictor to Apache
Commons Imaging and ran your test image through the read/write process. The
image size for kwf00346.tiff drops from 3623 KB to 2515 KB without any loss of
data. It's only slightly larger than a PNG of the same image would be.
Of course, now that Damjan pointed out that ExifWriter is a better solution for
you anyway, it probably doesn't matter.
Anyway, my changes would be ready to go as soon as I do more testing, but
there's an issue... It's been quite awhile since I've worked on this project,
and my development space is out-of-date. I need get it set up again. So it may
take me some time before I can get this code turned in.
> TIFF image gains significant size using TiffImageWriterLossless
> ---------------------------------------------------------------
>
> Key: IMAGING-170
> URL: https://issues.apache.org/jira/browse/IMAGING-170
> Project: Commons Imaging
> Issue Type: Bug
> Components: Format: TIFF
> Affects Versions: 1.0
> Environment: System: Fedora release 21, kernel version:
> 3.18.7-200.fc21.x86_64, JAVA: openjdk version "1.8.0_31", IDE: Eclipse Kepler
> 2, Build id: 20140224-0627
> Reporter: Remigiusz Malessa
> Priority: Minor
> Attachments: kwf00346.tif
>
>
> Good afternoon,
> I am posting an issue report as suggested by mr Benedikt Ritter. It's my
> first issue report and I've just recently started using the Commons Imaging,
> so please go easy on me.
> ------------------------------------------------
> Using Commons Imaging I am reading a Tiff image (will attempt to attach it to
> this ticket), then I remove a tag (Focal Plane Resolution Unit) and then I
> save the new TiffOutputSet to the system using TiffImageWriterLossless.
> The original image is 15MB, the new image (with the Tag removed) is 28MB.
> Here's how I do it:
> {code:title=RemoveTag.java|borderStyle=solid}
> import java.awt.image.BufferedImage;
> import java.io.File;
> import java.io.FileOutputStream;
> import java.io.IOException;
> import java.io.OutputStream;
> import java.util.HashMap;
> import java.util.List;
> import java.util.Map;
> import org.apache.camel.Exchange;
> import org.apache.commons.imaging.ImageFormats;
> import org.apache.commons.imaging.ImageReadException;
> import org.apache.commons.imaging.ImageWriteException;
> import org.apache.commons.imaging.Imaging;
> import org.apache.commons.imaging.common.ImageMetadata;
> import org.apache.commons.imaging.formats.tiff.TiffField;
> import org.apache.commons.imaging.formats.tiff.TiffImageMetadata;
> import org.apache.commons.imaging.formats.tiff.write.TiffImageWriterLossless;
> import org.apache.commons.imaging.formats.tiff.write.TiffOutputDirectory;
> import org.apache.commons.imaging.formats.tiff.write.TiffOutputSet;
> File tInputFile = new File("/home/rem/TEMP/tags.original.tif");
> File toutputFile = new File("/home/rem/TEMP/tags.new.tif");
> final BufferedImage image = Imaging.getBufferedImage(tInputFile);
> ImageMetadata tMetadata = Imaging.getMetadata(tInputFile);
> TiffImageMetadata imageMetadata = (TiffImageMetadata) tMetadata;
> outputSet = imageMetadata.getOutputSet();
> TiffOutputDirectory exifDirectory = outputSet.getExifDirectory();
> exifDirectory.removeField(41488);
> ImageFormats format = ImageFormats.TIFF;
> Map<String, Object> params = new HashMap<String, Object>();
> BufferedImage image = Imaging.getBufferedImage(tInputFile);
> byte[] bytes = Imaging.writeImageToBytes(image, format, params);
> TiffImageWriterLossless writerLossLess = new TiffImageWriterLossless(bytes);
> writerLossLess.write(os, outputSet);
> {code}
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