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Today's Topics:
1. Re: Reliable system (David Powell)
----------------------------------------------------------------------
Message: 1
Date: Sun, 13 Sep 2020 17:33:30 -0500
From: David Powell <da...@depowell.com>
To: Motion discussion list <motion-user@lists.sourceforge.net>
Subject: Re: [Motion-user] Reliable system
Message-ID: <ced17d16-63db-cd2f-a90d-ed180f104...@depowell.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
I have a similar problem and don't know how to fix it, but I do have an
idea about the spiders.
It seems that spiders (and bugs in general) are attracted to the IR
light emitted by security cameras at night.? I figure (and I have not
yet tried this) that if you turn off or disable the infrared "night
vision" on the camera, and put another IR source several feet away,
perhaps you will have the same "night vision" functionality but the
spiders will build their webs in front of the IR source instead of the
camera.
I plan to try this when I get a chance. It won't solve all the problems
but may help some. Has anyone else tried it?
David
On 9/13/20 2:49 PM, Bau Dev wrote:
> Hello to all,
>
> If I allow myself to write here it is to have your ideas and feedback
> on motion. I've been using it for several months now but I can't get
> the desired result.
> I have installed my alarm system (outdoor cameras, indoor cameras,
> 433Mhz infrared detectors, siren, backup power supply, GSM shield and
> so on).
> I would like to have the most functional system possible. It is not
> conceivable to trigger the siren several times during the night for
> false positives ! But on the other hand, this siren must be triggered
> automatically during an intrusion. I can't keep my phone on all night
> to check what's going on.
>
> Today, in this alarm system I use among others a raspberry pi 3b+ with
> motion (for the 4 outdoor cameras). However I have some false
> positives that I can't avoid: mosquitoes that spend the night very
> close, water drops at night when it rains etc.. At night when it rains
> I can reach up to 200 false positives. During the day, between 0 and 2
> false positives. With so little reliability, I even managed to turn
> off the outside cameras finally...
> Here are the images of some false detections.
>
> photo5915567089844860174.jpg
> photo5918052003303502838.jpg
> photo5918052003303502844.jpg
> photo5829970509054456810.jpg
> photo5832222308868142323.jpg
>
> By varying the different parameters I can't get a correct system. I
> set a reasonable threshold (low enough to detect a human movement and
> high enough not to constantly have false positives). But a spider
> passing in front of the camera is finally impossible not to detect
> with the threshold (even with the threshold_maximum) ...
> I also activated the smart filter. It allows to avoid the movements of
> grasses, trees and so on.
> I think it's mandatory to add a human shape detection algorithm, don't
> you?
> If so, do you know any that have a reasonable execution time? Indeed,
> all the ones I tried take more than 30 sec to identify a human on a
> single image! (Obvious given the CPU of a raspberry). And does a USB
> dungle really worth it?
>
> On the other hand, taking a step back, I find that very few home
> security companies offer outdoor cameras.?Or they are cameras you have
> to install yourself and therefore the feedback seems disappointing.
> Maybe that's a sign? Maybe we should only consider filming with
> outdoor cameras in order to have different angles in case of indoor
> intrusions (identified by infrared sensors which are more reliable)?
>
> What do you think about this?
> How do you do it?
>
> Thank you in advance for your ideas/feedback.
>
> Baudev
>
>
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