[cc-community] detecting cc license on PNG

Lucas Gonze lucas.gonze at gmail.com
Tue Mar 11 23:06:32 EDT 2008


Perfect.

Thanks, Jon.

On Sat, Mar 8, 2008 at 7:29 PM, Jon Phillips <jon at creativecommons.org> wrote:
>
>
>  On Sat, 2008-03-08 at 17:32 -0800, Mike Linksvayer wrote:
>  > On Sat, Mar 8, 2008 at 5:13 PM, Lucas Gonze <lucas.gonze at gmail.com> wrote:
>  > > Is there an existing method for PNG creators to mark their images such
>  > >  that a simple program can detect the CC license?
>  >
>  > http://wiki.creativecommons.org/XMP
>  > http://en.wikipedia.org/wiki/Extensible_Metadata_Platform#Location_in_File_Types
>  >
>  > >  I can imagine a method to do it -- a bit-for-bit comparison of a
>  > >  designated portion of the image -- but I'd rather not start from
>  > >  scratch.
>  >
>  > You mean encoded in the image data? Not that I know of. It would be
>  > easy to do (assuming it doesn't need to be robust, in which case you
>  > probably run into a watermarking patent minefield), but nearly
>  > impossible to get any other software to care.
>  >
>  > Mike
>  > _______________________________________________
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>  > cc-community at lists.ibiblio.org
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>
>  Actually, you should be able to use liblicense to read/write XMP in png
>  file with liblicense:
>
>  http://creativecommons.org/projects/liblicense
>
>  Here is a lovely chart detailing how to support cc license embedding in
>  different file types that Jason Kivlighn made last summer:
>
>  http://wiki.creativecommons.org/Tracker_CC_Indexing
>
>  Also, in reading this, I somewhat misplaced the need/hope to get more
>  filetype support in new/different formats...
>
>  Jon
>
>  --
>  Jon Phillips
>  jon at creativecommons.org
>  skype: kidproto (preferred phone)
>  im: kidproto
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>
>  Business + Community Manager
>  Creative Commons
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>
>
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