Re: Re: NOW : Face recognition WAS Car number plate capture/recognition

[David Paterson <david.paterson@xxxxxxx>]

On Fri, 05 Jul 2002 09:38:18 -0000, you wrote:

>> One way to do it just now could be by measuring differences from
a
>> baseline "unoccupied" image.  Based on the size of
the object you 
>could
>> probably distinguish people from cats (or milk monsters?)
>> 
>The big problem with this approach is things like furniture being 
>moved, large bags or boxes being left in a room, or even a big shadow
>or patch of sunlight.
>
>Don't get me wrong, I too believe that this will be the eventual 
>method for occupany detection, but it is a little more complicated 
>than just detecting that the 'scene' has changed from 'baseline'.

I was probably being over-simplistic :-)  If it was as easy as that
it
would be on the market by now.

Still, for home-brew solutions it's maybe worth trying.  You could
always send a "recalibrate" command after moving furniture, or
as
somebody else suggested, look for things that move fast.

I wouldn't worry too much about patches of sunshine - once Wimbledon's
over we won't see the sun again for months <g>

DP

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