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February 2001, Week 4

HP3000-L@RAVEN.UTC.EDU

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From:
"COLE,GLENN (Non-HP-SantaClara,ex2)" <[log in to unmask]>
Reply To:
COLE,GLENN (Non-HP-SantaClara,ex2)
Date:
Thu, 22 Feb 2001 15:48:38 -0800
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>>  > How can I set up my image files (i.e. JPEG) in an HTML page
>>  > so that it will display but not allow the user to download?

>>  Rather than take this angle, perhaps it is sufficient to
>>  "watermark" the image so that it displays without apparent
>>  artifacts, but so that you can prove the image is yours

>That watermark (which is normally done by writing some sort of signature
into
>the low order bits of an image, across many pixels, so that it can't really

>be seen in the image) lasts exactly as long as the image is not manipulated

>in any manner (made larger, smaller, cropped or converted into another
>graphic format). At that point, the watermark is gone.

Makes sense.  How about a *visible* watermark then?  (Of course,
I don't know if this is acceptable in Dave's case.)

   http://www.imagingweb.com/aff/visual_watermark.htm
or
http://www.graphicssoft.about.com/compute/graphicssoft/c/ht/00/07/How_Add_Te
xt_Watermark0963973007.htm

(with apologies for the wrap).

--Glenn

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