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From "Bruno Abreu" <bruno.ab...@livingdata.pt>
Subject Problem loading JPEG metada
Date Fri, 31 Oct 2008 15:00:26 GMT
Hi all,

I'm new to image processing, so I'm sorry if this is a dumb question.

I'm trying to load the metadata from image files generated by a JAI-PULNIX camera, model
TS-1327EN.

I am specifically interested in getting the following tag values:

ExifTagConstants.EXIF_TAG_IMAGE_DESCRIPTION,
ExifTagConstants.EXIF_TAG_DATE_TIME_ORIGINAL and
ExifTagConstants.EXIF_TAG_SUB_SEC_TIME_ORIGINAL.

But, when the following line of code is executed:

    IImageMetadata metadata = Sanselan.getMetadata(file);

I get one of two errors:

java.io.IOException: Invalid Segment: insufficient data
	at
org.apache.sanselan.common.BinaryFileFunctions.readByteArray(BinaryFileFunctions.java:497)
	at org.apache.sanselan.formats.jpeg.JpegUtils.traverseJFIF(JpegUtils.java:88)
	at org.apache.sanselan.formats.jpeg.JpegImageParser.readSegments(JpegImageParser.java:175)
	at org.apache.sanselan.formats.jpeg.JpegImageParser.readSegments(JpegImageParser.java:273)
	at
org.apache.sanselan.formats.jpeg.JpegImageParser.getExifRawData(JpegImageParser.java:383)
	at
org.apache.sanselan.formats.jpeg.JpegImageParser.getExifMetadata(JpegImageParser.java:363)
	at org.apache.sanselan.formats.jpeg.JpegImageParser.getMetadata(JpegImageParser.java:314)
	at org.apache.sanselan.Sanselan.getMetadata(Sanselan.java:871)
	at org.apache.sanselan.Sanselan.getMetadata(Sanselan.java:864)
	at org.apache.sanselan.Sanselan.getMetadata(Sanselan.java:839)
	at MetadataExample.metadataExample(MetadataExample.java:21)

or

java.io.IOException: Could not read block (block start: 1020, block length: 1447680,
data length: 900).
	at org.apache.sanselan.common.byteSources.ByteSourceArray.getBlock(ByteSourceArray.java:47)
	at org.apache.sanselan.formats.tiff.TiffReader.getTiffRawImageData(TiffReader.java:409)
	at org.apache.sanselan.formats.tiff.TiffReader.readDirectory(TiffReader.java:197)
	at org.apache.sanselan.formats.tiff.TiffReader.readDirectory(TiffReader.java:100)
	at org.apache.sanselan.formats.tiff.TiffReader.readDirectories(TiffReader.java:92)
	at org.apache.sanselan.formats.tiff.TiffReader.read(TiffReader.java:399)
	at org.apache.sanselan.formats.tiff.TiffReader.readContents(TiffReader.java:390)
	at org.apache.sanselan.formats.tiff.TiffImageParser.getMetadata(TiffImageParser.java:125)
	at org.apache.sanselan.ImageParser.getMetadata(ImageParser.java:76)
	at
org.apache.sanselan.formats.jpeg.JpegImageParser.getExifMetadata(JpegImageParser.java:376)
	at org.apache.sanselan.formats.jpeg.JpegImageParser.getMetadata(JpegImageParser.java:314)
	at org.apache.sanselan.Sanselan.getMetadata(Sanselan.java:871)
	at org.apache.sanselan.Sanselan.getMetadata(Sanselan.java:864)
	at org.apache.sanselan.Sanselan.getMetadata(Sanselan.java:839)
	at MetadataExample.metadataExample(MetadataExample.java:21)

I'm attaching two files. One for each of the errors.

Is there something wrong with the encoding of these images?

If that is the case I could contact JAI-PULNIX and ask them to fix, but I'm not sure
what the problem is.

Any help would be much appreciated.

Thank you,

Bruno Abreu

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