Gary Lucas created IMAGING-362:
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Summary: TIFF tags 0x111 and 0x117 have wrong descriptive names
Key: IMAGING-362
URL: https://issues.apache.org/jira/browse/IMAGING-362
Project: Commons Imaging
Issue Type: Bug
Components: Format: TIFF
Affects Versions: 1.0-alpha2
Reporter: Gary Lucas
Fix For: 1.0-alpha3
The TIFF standard defines metadata elements using integer code values. For code
values 0x111 and 0x117, Commons Imaging associates these with incorrect names
"PreviewImageStart" and "PreviewImageLength". According to the specification
"TIFF Revision 6.0 Final – June 3, 1992", the correct names for these are
"StripOffsets" and "StripByteCounts". In fact, the word "preview" never even
shows up in the TIFF specification.
This should be an easy fix. No new test cases will be required, since these
are descriptive elements only.
The role of these two elements is to define the file position and length of
data elements for TIFF files that are encoded as strips.
One of the example programs in the Commons Imaging distribution (which is not
compiled) is called ReadTagsAndImages.java. It can be used to dump TIFF tags.
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