I think the OV7670 has scaling and variable resolution, even if it
doesn't you can work around it with a clock, skip and a jump :)

$7 US is not bad:

http://www.ebay.com/itm/180818996795

Bob

On Fri, Mar 15, 2013, at 02:13 PM, Art wrote:
> I don't really need a Pi, it's massive overkill. Herbert, thanks for=20
> reminding the group that I don't need precision, high resolution or an=20
> oversized processing system.
>=20
> The area being protected is the size of a house, there might be 3 to 5=20
> of these per house. So, a Pi for every optical based detector=20
> effectively breaks the bank in terms of cost and it looks like it's a=20
> little power hungry as well.
>=20
> I'd really like to have the scanning built into a pic sized single chip,=
=20
> if possible. Again, 100 by 100 pixels is adequate, I don't want to take=20
> a 640 by 480 image and throw out most of the data before scanning the=20
> image to detect motion.
>=20
> I'm not finding camera chips that do low resolution though.....with the=20
> exception of optical mouse chips.
>=20
>=20
> > I think you should read the op's posts. They are interested in very low
> > res (i.e. 200x200) and very low fps (around 4fps IIRC). This is FAR mor=
e
> > then within the capabilities of the Pi.
> >
> > Again, the OP planned to use a PIC, try keeping some perspective here
> > instead of your apparent blind hatred of a Pi solution.
> >
>=20
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--=20
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