Re: Protecting Images - Thanks!

Thanks all for the input and advice!!!!



>Date: Wed, 10 Jun 1998 13:47:36 -0700
>From: "Spanky, THX1139" <spanky(at)ediblebrain.com>
>To: "Ernie Black [ext 423]" <ernie(at)supra.applix.com>
>CC: hwg-graphics(at)hwg.org
>Subject: Re: Protecting Images
>
>Nicely said Ernie!
>
>I think with your last paragraph we can consider this topic "case
>closed."
>
>Synopsis:  No matter what you do, if you put an image on the web that
>someone wants, they'll take it.  If it is valuable enough to you then
>copyright it (or just say it's copyrighted, copyrights are expensive). 
>When someone takes it be prepared to sue (or act as though you could 
and
>have them remove your graphic).  There's nothing else you can do aside
>from just not putting your graphic on the web.
>
>
>Ernie Black [ext 423] wrote:
>> 
>> Ah, but changing your resolution will only change the relative size 
of the image on your screen; screen resolution (on a Mac) is still 72 
dpi (on a PC it's 96). That is, at 640x480 a 1-inch-by-1-inch 72 dpi 
image appears much larger than at, say, 1280x1024, but in either case 
the image contains exactly 5184 pixels, whereas a 300 dpi 1" sq. image 
contains 90,000 much smaller pixels; when the screen resolution is 
changed, the pixels become larger or smaller accordingly. A 144 dpi 1" 
sq. image on a Mac will occupy 2 sq. inches because the monitor can only 
display 72 pixels per inch (ppi). Hence a high res image must exceed the 
viewing dimensions of even the largest monitors.
>> 
>> As for protecting images, the point of normally-invisible watermarks 
(and a possible use of steganographic encryption) is not to prevent 
downloading, but to prove copyright if needed in a court of law. 
Normally visible watermarks (those that are apparent when viewing the 
image on the net) simply declare the copyright claims of the owner (and 
can be edited out). Tricks can help prevent downloading, but I side with 
those who say, post your copyright, if necessary incorporate watermarks 
and/or encryption, and let it go. If need be, post thumbnails of artwork 
with password-protected links to high res images (folks must register to 
access).
>
>-- 
>
>Spanky
>spanky(at)ediblebrain.com
>URL: http://www.ediblebrain.com
>"Those who hear not the music
>  think the dancers mad."
>


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