2) use alot of squares - because detection routine uses average value of square so make square as small as possible
Yep, you need a square size closer to your target object size.
OK, so hypothetically, if I'm looking to capture a tiny, fast-moving trigger such as distant (eg tiny LCD) movement, it would be better to use a 128x96 grid with 50ms intervals than a single masked target box 1/25th of the screen with 1 cycle interval and pixel step 0... because what you're saying re: averaging, is that it really isn't pixel step 0, just in what gets averaged together to become the comparison value takes into account all pixels? And with such a fast compare interval, it doesn't detect that anything moved because the pixels of the captured region, when averaged, seem exactly the same. Mathematically I understand, but it makes it damn frustrating when experimenting.
So basically... small cells with many active pixels (likely zero pixel step), and you'll have to mask cells or MD will slow down to a crawl. Then there will hopefully be a sweet spot between enough averaged pixels and small enough cell size so that noise won't autotrigger. But sounds like you've tried everything already and it didn't work... you may very well be beyond the reliable operating limits of the live view in terms of resolution, noise and CPU speed.
Anaglyphic. one more idea:what about using some optical zoom for detection of small objects in centre then zoom out and make shoot?it seems it is equivalent to using custom centred grid but with better detection reliability...I think such technique would be useful in cases when you can predict location of object.
I'm not sure if this is running in my SX1 IS.I runned script "MDFB-080716-DigicIII-MovieButtonModels.bas". But when I tried it, it begins to take photos. Even when I put lens cap to the lens.Anyone could explain me why is this happening?
Tried again fudgey's motion detection script last evening and used default values plus the mask right=2 and bottom=2. So the camera only used the 8 cells in the upper left part. It worked and didn't constantly fire. I threw things in the cameras field of view and it took pics. I set the SX1 to MF, then to AF. Worked the same, though I didn't test for differences in speed.
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