Camera Motion Detection

gwrtheyrn

5
IXUS 950IS

« on: 19 / July / 2008, 12:43:52 »

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some cameras like the IXUS 950 IS have a built-in kind of camera-motion-detection to detect which way around the camera is being held. if you turn it upside down, the displayed picture will too.

couldn't this be used for some camera-movement-detection? maybe it's possible to access the movement-data directly...

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fudgey

1705
a570is

Re: Camera Motion Detection

« Reply #1 on: 19 / July / 2008, 14:15:52 »

There are several threads on this forum about this stuff. In short, camera motion can be detected from image stabilization sensors (on cameras which have them), and some of it has already been proven to work but doesn't exist in CHDK trunk builds yet.

The orientation sensor on the other hand is not suitable for this purpose (unless your motion happens to be spinning the camera around randomly), as it only has a few discrete states.

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gwrtheyrn

5
IXUS 950IS

Re: Camera Motion Detection

« Reply #2 on: 19 / July / 2008, 14:22:44 »

Thanks for your answer. I guess in that case i'll either wait until it's in the trunk or just try the development version...

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fudgey

1705
a570is

Re: Camera Motion Detection

« Reply #3 on: 19 / July / 2008, 14:31:35 »

I'm not sure if any of that code has been added to anything but Dataghost's experimental tree, which at least a while back was only available for a few camera models (the IS functions need to be searched for, found, added to CHDK and tested for each and every camera model that has IS... quite a bit of work to be done there and on top of that comes the actual feature development).

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LjL

266
A720IS

Re: Camera Motion Detection

« Reply #4 on: 19 / July / 2008, 18:35:09 »

What do you have in mind about "camera movement detection", though? What would you detect?

I've already provisionally implemented focusing and setting macro mode by tilting the camera (only for cameras supported by DataGhost's build, of course), if that's the kind you have in mind.

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