On Thu, 24 Jul 2008 20:24:51 +0100, Orchid XP v8 wrote:

>>> I meant you can't just give a machine a BW picture of a tree and have
>>> it automatically know to turn it green. That's impossible.
>> 
>> I don't know that to be the case.  Again, a case of one's ability to
>> fathom how something like that is done doesn't translate to "there's no
>> way it could possibly be done".
> 
> It's a basic premise of signal processing that you cannot recover data
> that isn't there any more. Shannon's theorum and all that.
> 
> Whether you can *fake* something that "looks" right is another matter.
> But *recover*? No. Impossible.

At least as far as we know today.

A couple centuries ago, people also believed that if someone's heart 
stopped beating it couldn't be restarted and they were dead forever.  We 
know that to not be the case in all circumstances today.

If you take a photo of something out of focus, you could never recover 
the original picture again, right?

Wrong.  http://refocus-it.sourceforge.net/

Pretty cool plugin.  Even 5 years ago, something like this would have 
been thought to be totally impossible.

Jim

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