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Camera mouse for touch screen device
On the iPad, every time you use your finger and hand to touch a
button you are occluding part of the screen. If you made a really
simple 2d version of the Kinect you could operate a camera mouse
on the iPad screen with minimal occlusion.
You mean like this?
[MaxwellBuchanan, Aug 26 2012]
Touch UI Back Touch Adds Second Touchpad to iPhone
[CraigD, Aug 27 2012]
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||Another approach, which I found ingenious when it appeared several years ago on iPods, put the touchscreen on the back of the device (the opposite side from the screen). The advantage of such a scheme over this ideas watch my finger cam approach is that its better suited to one-handed use, as when youre picking up stuff with one hand while checking it off a list with another (eg: grocery shopping)
||Though I recall the backpad touchscreen was on only a shortlived iPad version, you can get back touch case add-ons for iPhone 4s see [link].