Helmut Hissen wrote:
> 1) we need a shadow filter, basically something that looks at a delta
> and determines that the delta is due to shadows on the ground (from
> branches above) moving about. I think you should be able to detect tha=
> because the pixel colours would move between their shade colour and the=
> sun colour, ie: red may turn brown but never blue, esp if we know it is=
> sunny windy day.
motion does not take care about the color in the picture. We only
calculate the difference in brightness. This had turned out to be the mos=
effective way to detect motion.
How large are the branches? Are they smaller ones - like leaves weaving i=
the wind? If so, you should try the despeckle option with labeling turned
on. If it's the huge ones, there is not solution today, but another user
was complaining about it some time ago. Maybe I will find a solution some
day, that doesn't cost too much CPU.
> 2) we need a bug filter. some of our cams have infared LEDs for
> no-light conditions. so, suddenly this huge white 6ft mosquito will ap=
> and be gone again in the next frame. not sure yet how best to filter t=
> out without missing important but more subtle changes.
Someone else came up with it already: try to set "minimum_motion_frames"
to 2 or 3 and see if it helps.
> 3) would like a motion-light-out filter so that I dont get a separate
> movie showing that the motion light turned off. I think that should be
> easy, too, because that change has a very specific signature.
This can definitely be catched with "minimum_motion_frames". A different
approch would be to set "gap" to some value (in seconds) that is slightly
above the hold time of the light. That way you will see the light going
off at the end of the same movie file where it was switched on.
> I dont mind doing some coding, but I've read the bits in the doc notes
> about completely redoing the plugin setup and I would rather write code
> AFTER that's settled.
That part of the project doesn't seem to be too much alive yet. Just go
ahead if there is some useful feature in your mind. Before you start
coding, please have a look into the Wiki and get the latest SVN codebase.
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