Is it possible to use LM upside down?

PhilLu 2014-04-25 15:32:28 UTC #1

Hello,
Is It possible to use Leap Motion upside down to be able to detect 3D objects on the table? ( and object movements...)

catalinmacovei 2014-04-25 19:29:06 UTC #2

Yes, but be careful on X, Y, Z coordinates. And Leap doesn't detect object, just hands and fingers.

PhilLu 2014-04-25 20:31:05 UTC #3

.........and pencil???

AlexColgan 2014-04-26 02:27:44 UTC #4

Hi PhilLu,

Pencils, chopsticks, and similar tools (we call them "pointables") can all be tracked along with hands and fingers. You'll want to make sure that your table doesn't reflect infrared light, or this could interfere with the tracking.

PhilLu 2014-04-26 05:16:42 UTC #5

Fine, then if table is black and object is white, it will be visible?
If yes, I can detect object moving?
If object is in glass?
If object is an animal? (a mouse)
...

AlexColgan 2014-04-26 10:52:42 UTC #6

(1) Actually, it seems that pointing down is not currently supported. Sorry about that.

(2) Only hands, fingers, and pointables, not other objects. The Leap Motion Controller is designed for near-zero latency and high framerates, so it doesn't use point cloud or depth data, but instead returns input as frames. I highly recommend that you check out our developer documentation for more info.

(3) Glass can also interfere with tracking. However, many people have successfully tracked hands, fingers, and pointables through thin glass, placed against the device. Alan Davis, one of our engineers, has a great post in this thread about these sorts of setups.

(4) No, it cannot track a mouse.

jonesmerc 2016-04-11 08:39:35 UTC #7

I see I can track hands from above, but what about accuracy. It seemed to me that the finger flexion is not recognized as accurately as if the leap was used in its normal position. Maybe calibration would help? Or is it given, that a leap underneath my hand is tracking better data than an upside down leap from above?
Thanks for any help on that.
cheers