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Re: [OM] Digital True Lies

Subject: Re: [OM] Digital True Lies
From: "John Cwiklinski" <plinkochips@xxxxxxxxxxx>
Date: Tue, 17 Dec 2002 15:36:56 -0800
Winsor wrote:


One of the interesting new devices that is optional on the Canon
EOS-1D is a data verification device. The camera can be set to write
a code into the header of the digital file. The image file can then
be read by a device that will verify whether the image has been
changed at all even by one pixel.
<<

Very interesting, indeed. A few companies have sprung up in the past few years that do "digital watermarks" for this and many other legal reasons (i.e. copyright, etc.). It would be interesting to find out what technology they are implementing.

John Cwiklinski

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