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5th January 2017, 08:27 PM
#1
Automated Home Legend
Cameras for motion detection inputs to presence sensing
we're now running nine cameras in our set-up - would be more, but hardware problems temporarily keeping two more out ...
meaning we've tried including motion detection in presence sensing ...
mixed results so far, partly because lights going off can be seen as motion !
so, wondered, anyone else trying this - any successes ?
Chris
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6th January 2017, 11:14 AM
#2
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6th January 2017, 12:19 PM
#3
Automated Home Legend
yes, our one that looks out across our front yard has some of those issues, too ...
the grid overlay approach to motion-sensing works really well, for excluding (eg) people going-by from being detected - but, at times of the day when the Sun is low & to the east / south-east, shadows from passing cars & people can be thrown into other areas of the image, triggering motion detection ...
ditto when people opposite are manoeuvring their car at night, its lights can do something similar ...
and when our yard lights go out, they can be seen as motion, too (presumably off is hard-edged, whilst on is sufficiently soft-edged to be missed) ...
indoors, too, we find lights going off can do the same, though we might have a chance of creating some General Logic to discount the effect, because Cortex generally knows what its Lights are doing ...
as you say, it's tempting to believe some pattern recognition coding could help - neural net or otherwise - 'though have no feel for what would be the necessary resolution in the images to achieve this, plus using WiFi to communicate with cameras brings issues affecting images, which could complicate things ...
being able to allocate grid elements to named zones, for dealing-with separately, would be more than useful - ie: motion in one area will often need a different response to motion in another (perhaps depending on time of day & circumstances, too) ... plus it might provide a basis for simple pattern recognition to deal with (eg) the shadow & car headlights issues ...
Chris
PS: another false trigger we get, with a camera looking out, is raindrops running down the window, when it's raining a lot / heavily ...
Last edited by chris_j_hunter; 6th January 2017 at 02:47 PM.
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6th January 2017, 12:42 PM
#4
Automated Home Guru
This got me thinking and I was pondering about the possibility of off-loading the motion detection part to another application and then feeding that back into Cortex so off to Google I went ... as you do ... and came across this:
https://www.sighthound.com/products/sighthound-video
Looks quite interesting so I may give the trial version a go and see how that works out and to see if there are any options to pass detected motion to Cortex. I've seen that there is a plug-in for Homeseer so it is more than possible. The other two options (Sentry and Cloud) look quite interesting too.
Thanks,
Nad
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6th January 2017, 01:01 PM
#5
Automated Home Legend
no feel for it, but imagine it might need relatively hi-res cameras, to work reliably ...
our Mobitix & Y-cam might be accommodated (the brands are on their list), but we're mainly using tablet cameras (some front, some rear) ...
will be v.interesting to hear how you get on !
Chris
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7th January 2017, 04:39 PM
#6
Automated Home Legend
just to add an extra factor ...
ie: with the mist / fog we have today, that is not too terrible, can still see things a few hundred metres away - we're finding motion sensing is much less effective at noticing things moving outside ...
Last edited by chris_j_hunter; 7th January 2017 at 05:33 PM.
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24th January 2017, 12:48 PM
#7
Automated Home Guru
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