[IMAGING-18] JpegImageMetadata getEXIFThumbnail only works on Jpeg thumbnails stored as Tiff images.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0-alpha1
• Labels: bufferedimage getexifthumbnail imageio jpeg jpegimagedata thumbnail

Environment

Windows Vista, Java 6 SE, incubator 0.97 and 0.98 SNAPSHOT

• Assignee: Unassigned
• Reporter: James E-J
• Created: 12/Mar/10 00:51
• Updated: 03/May/19 08:39
• Resolved: 09/Sep/10 19:35

Description

JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
BufferedImage image = jpegMetadata.getEXIFThumbnail();

Above code seaches tiff directory structure but only searches for dir.getTiffImage() and only checks if tiffImageData is null. Jpeg files which have Jpeg thumbs stored as JpegImageData do not work.

I was able to fix this with following code:

import org.apache.sanselan.formats.tiff.JpegImageData;
import javax.imageio.ImageIO;
import java.io.ByteArrayInputStream;

	public BufferedImage getEXIFThumbnail() throws ImageReadException,
			IOException {
		ArrayList dirs = exif.getDirectories();
		for (int i = 0; i < dirs.size(); i++) {
			TiffImageMetadata.Directory dir = (TiffImageMetadata.Directory) dirs
					.get(i);
			// Debug.debug("dir", dir);
			BufferedImage image = dir.getThumbnail();
			if (null != image)
				return image;
                        JpegImageData jpegImageData = dir.getJpegImageData();
                        if(jpegImageData!=null){
                            ByteArrayInputStream input = new ByteArrayInputStream(jpegImageData.data);
                            image = ImageIO.read(input);
                            if (image!=null)
                                return image;
                        }
		}

		return null;
	}

Issue Links

• is depended upon by: IMAGING-48 JpegImageMetadata getEXIFThumbnail may raise a null pointer exception