Front door rules

Share tips and tricks related to Sighthound Video or your full security setup.

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Front door rules

by nunuvyurbiz » Fri Aug 15, 2014 5:57 pm

Hi - what rule would you recommend for capturing folks approaching your front door (and lingering, and then walking away)?

I originally did crossing a boundary, but that got tricked by two people walking side by side along the sidewalk, then one turning toward my house. SH couldn't distinguish between the one person getting closer, and the person standing behind her still on the sidewalk, until she got really close and the center mass of the two combined (the +) crossed the boundary.

Also, I don't think "crossing a boundary" continues to capture for very long, so patient solicitors don't get fully captured.

I tried inside an area, and marked off a trapezoid area (wide by the door, narrower by the sidewalk, sort of a rectangle at perspective) which addresses the lingering people, but that gets tricked by some bushes moving in the wind.

EDIT: I'm experimenting with "on top of" which seems to work well so far. The larger region (instead of a boundary) results in more false positives, but not too bad.

It would be awesome if SH could understand the space, and have things like vertical planes in 3D space. Looking at a scene at an angle means that center mass doesn't cross a line until pretty late (the shallower the angle, the longer the delay).

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Walt Dockery
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Joined: Thu Apr 24, 2014 2:55 pm

Re: Front door rules

by Walt Dockery » Wed Aug 20, 2014 11:31 am

IIRC I use "on top of" a region. I use a time limit (like, 2 seconds or something like that) and a pixel size minimum, that cuts down on things like bushes/shadows triggering falses. You have to play with it a little bit but you are on the right track.

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