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Re: [Motion-user] Multiple masks
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From: Kenneth L. <ke...@la...> - 2005-05-19 05:53:00
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At 23:20 2005-05-18, you wrote: >I expect each thread will take its own picture, which is quite >inefficient. I don't know the >internals of motion enough to know if it *could* attach to the same analog >capture device with >different threads. This is correct. Motion will run "round robin" so it is not the same image that will be reused. >But I wonder if you could accomplish the same thing by using the latest >snapshot release - >3.2.1-snap17? >It will tell you what the coordinates (center) and size of the motion >are. You could perform >different actions where the X and Y coordinates are inside of mask "A" or >mask "B", etc. > >Aaron This is exactly my reaction also and one of the thoughts with the new feature. The new convertion specifiers were introduced as part of my generic tracking project. But the same information can also be used to call an external script which uses the coordinates to decide what to do with the Motion detection. Kenneth >--- Andrea Oliva <and...@ne...> wrote: > > Hi, I'm using multiple masks over a single source to > > determine which of the sensitive areas are to be alerted. > > > > A simple schema will be this one below, where one camera > > takes the whole picture including sensitive areas. > > +-------------------------------------+ > > | | > > | +---+ | > > | | A | +---+ | > > | +---+ | B | | > > | +---+ | > > | | > > | +---+ | > > | | C | | > > | +---+ | > > | | > > +-------------------------------------+ > > Since I have to perform 3 different actions depending on > > which area detects motion I will use 3 threads, and > > areas A, B and C are masked separately for thread 1: > > +-------------------------------------+ > > | | > > | +---+ | > > | | A | | > > | +---+ | > > | | > > | | > > | | > > | | > > | | > > | | > > +-------------------------------------+ > > thread 2: > > +-------------------------------------+ > > | | > > | | > > | +---+ | > > | | B | | > > | +---+ | > > | | > > | | > > | | > > | | > > | | > > +-------------------------------------+ > > and thread 3: > > +-------------------------------------+ > > | | > > | | > > | | > > | | > > | | > > | | > > | +---+ | > > | | C | | > > | +---+ | > > | | > > +-------------------------------------+ > > > > How does motion handle this? I mean does it take one snapshot > > for thread 1 and check it with mask A, then another (from the > > same source) for thread 2 checked against mask B then the > > third masked with C? > > Or it takes one only snapshot then it "shares" it between all > > 3 threads, each of which will use it's own mask? > > > > Hope not to have bored you too much with my ascii-art... > > > > Bye > > Andrea > > > > > > > > > > ------------------------------------------------------- > > This SF.Net email is sponsored by Oracle Space Sweepstakes > > Want to be the first software developer in space? > > Enter now for the Oracle Space Sweepstakes! > > http://ads.osdn.com/?ad_id=7412&alloc_id=16344&op=click > > _______________________________________________ > > Motion-user mailing list > > Mot...@li... > > https://lists.sourceforge.net/lists/listinfo/motion-user > > http://www.lavrsen.dk/twiki/bin/view/Motion/WebHome > > > > > >Yahoo! Mail >Stay connected, organized, and protected. Take the tour: >http://tour.mail.yahoo.com/mailtour.html > > > >------------------------------------------------------- >This SF.Net email is sponsored by Oracle Space Sweepstakes >Want to be the first software developer in space? >Enter now for the Oracle Space Sweepstakes! >http://ads.osdn.com/?ad_id=7412&alloc_id=16344&op=click >_______________________________________________ >Motion-user mailing list >Mot...@li... >https://lists.sourceforge.net/lists/listinfo/motion-user >http://www.lavrsen.dk/twiki/bin/view/Motion/WebHome -- Kenneth Lavrsen, Glostrup, Denmark ke...@la... Home Page - http://www.lavrsen.dk |