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Digital Watermarks

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Old 03-31-2003, 07:56 AM
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winwintoo winwintoo is offline
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Join Date: Feb 2002
Location: Regina, Saskatchewan
Posts: 942
Digital Watermarks

I stumbled across this site this morning and thought it might be of interest:


I don't know anything about it except what is available on the site.

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Old 03-31-2003, 08:58 AM
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jeaniesa jeaniesa is offline
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Join Date: Aug 2001
Location: Colorado foothills
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Thanks for the link Margaret.

I looked into digital watermarks during the discussion we had on how to protect images. I was disappointed to discover that if a filter (just about any filter) is run on a digitally watermarked image, it essentially disables the watermark. Cropping a little bit keeps it, cropping a lot disables it.

Bottom line, the digital watermark helps you track in image that is copied as is. But, if someone wants to make "photo-art" from it and claim it as their own, it is pretty much impossible to track that.

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Old 04-01-2003, 02:14 AM
Stephen M Stephen M is offline
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Join Date: Apr 2002
Location: Sydney, Australia
Posts: 439
An interesting side note on security graphics can be found here (from the famous Xerox/PARC research centre):


Stephen Marsh.
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