IP vetting for included reference data

[hennejg]

The following files come from the official reference suite. It is currently no longer available from the original source, but has been mirrored here for the jbig2dec library

• 042*.jb2 is an excerpted page from a CCITT specification. It is used as an example in several places, e.g. https://books.google.de/books?id=ptzgBwAAQBAJ&lpg=PA129&ots=hXbW_FaEVw&hl=de&pg=PA129#v=onepage&q&f=false
• amb.bmp is a dithered representation of a promotional photo of Ally Mc Beal (Callista Flockhart)
• 002.jb2 is the first page of US Patent 6,122,289
• 003.jb2 seems to be from a report concerning the Lewinsky scandal
• 004.jb2 and 005.jb2 are excerpted pages from "Libertarianism: A Primer" by David Boaz, a copyrighted work from 1997
• 006.jb2 is a page from an SEC registration
• 007.jb2 see 042*.jb2 above

These sample bitstreams are referenced in many places, e.g. here but not all include the actual files. Jbig2dec is licensed under the GPL but I doubt that this applies to the sample images as well.

The following files/bitstreams are reproduced as hex-dumps within the T.88 specification document

• sampledata*.jb2 contains minimal sample bitstreams for varoius segment types

The heritage of the following files is known, but the copyright status is not clear

• 201231100*.jb2 seems to be an official and public record from the state of Arizona. License has been granted here: https://code.google.com/archive/p/jbig2-imageio/issues/11, although it is not clear whether the granter had the right to do so.

[hennejg]

The files seem to fall into three categories:

1. Files from the original test suite. While the copyright status of the file isn't problematic, the status of the content seems to be muddy in some cases.
   • Files containing representations of public U.S. government documents should be in the public domain: https://en.wikipedia.org/wiki/Copyright_status_of_work_by_the_U.S._government
   • The same applies to representations of U.S. patents: https://en.wikipedia.org/wiki/Copyright_on_the_content_of_patents_and_in_the_context_of_patent_prosecution
   • 004.jb2 and 005.jb2 seem problematic but may be covered by some exemption.
   • amb.bmp most likely problematic (Wikipedia claims fair use on a similar picture - can we, too?). The picture seems to be a crop from a photo used in many places, but no authoritative copyright info seems to be available.
2. Files provided to us with the permission to use them for testing purposes
   201231100*.jb2 is the only case, seems to be a public U.S. document anyway and therefore in the public domain. I have not contacted the original provider of the files for the simple reason that his or her e-mail address has been lost when the Googlecode site went into archived state.
3. Files with content so trivial that copyright should not be an issue, i.e. fragments of bitstreams, isolated segments, trivial test images

[hennejg]

Reference images as PNG for easier viewing
reference-images.zip