infrared beacon for pet door

Where's the video clip of the guys with the imaging processing system? It was deployed to let the cat in, but NOT if she had a "present" in her mouth....

-- A host is a host from coast to snipped-for-privacy@nrk.com & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433

You're supposed to sterilize your pets.

Good Luck! Rich

Here:

Steve

On a sunny day (Fri, 12 Dec 2008 14:45:52 -0500) it happened "Stephen D. Barnes" wrote in :

Absolutely wonderful. Pity it is not open source, would like to see the algos.

On a sunny day (Fri, 12 Dec 2008 14:45:52 -0500) it happened "Stephen D. Barnes" wrote in :

Ok, I just did some coding, and Iwas thinking like this: They claim the 'curve' is unique (say outline) for the 'correct' cat.

I did a full FFT open the pictures from my security cam, hey a 640x480 picture in color, really, it is a lot of data. The idea being that the spectrum should be unique, but shift to higher frequencies for a further away object. However the ratio between the FFT components should not change much when the object is closer or further away? I am not sure if that would hold during rotation and sizing due to distance. It is a lot of data per picture.... result is 230408 abs frequency values.... The soft is fast enough it seems. Anybody any ideas?

Would almost think you could use a vactor descrition, like in characters in a pdf document, to store outlines. image to vector graphics? Have to think about this some more, any suggestions welcome.

haha, was I right. just a quick google found this open source program to convert bitmaps to vector graphics:

I took the 'cat Template.jpg' from the 'flo' site, and did feed it through convert Template.jpg Template.bmp

and then converted it to bitmap: potrace -k .25 Template.bmp

The result: ftp://panteltje.com/pub/Template.eps The size is now only 1275 bytes. Here we can do something.

You can download and look at that file with an encapsulated ps capable viewer, like ghostview: gv Template.eps

potrace can make pdf too. potrace -p -k .35 ./Template.bmp

And to make a pdf from it: ps2pdf Template.ps See it here: ftp://panteltje.com/pub/Template.pdf

So for those without a ps and pdf viewer, lets make a gif: convert Template.eps Template.gif

See the nice vector cat here: ftp://panteltje.com/pub/Template.gif So, now how to compare pdf to pictures...... At least I have the curves / vector grahics now :-)

PS. Sorry Windows users, 'time for change'. LOL

...

Or just drive a pulse into a small coil & pick it up with another door-mounted coil. Those make for simple Tx and Rx, omnidirectional, etc.

If you're stuck on IR...

Cut the range: you don't need 6 feet, more like 6 inches. cut the LED pulse to 1mA, trim the pulsewidth.

That should get you pretty close.

And for a receiver you might ignore the IR and just pick up the RFI...

(I test IR remote controls by holding them close to an AM-band radio--you can hear the pulses.)

Cheers, James Arthur

For forcibly handling unhappy cats i prefer the gauntlets that concertina wire installers use. Otherwise OK.