ubuntu-phone team mailing list archive

[Robert Schroll <rschroll@xxxxxxxxx>]

On Wed, Aug 5, 2015 at 12:51 PM, Arash <arashbm@xxxxxxxxx> wrote:
> Many people feel a little dizzy or nauseous when reading on a train 
> or car. This happens because your eyes see that the phone (or book) 
> moves up and down but your body doesn't feel that movement.

I think you have that backwards -- your ears are indicating 
acceleration but your eyes are showing that nothing's moving.  This is 
why looking out a window helps.  You see the same motion that your ears 
have been sensing.

Nonetheless, the same sort of solution might be available.  The desire 
is the same: to get the screen to indicate the same motion your ears 
are detecting.  I wonder what the relevant frequency range is.  My WAG 
is that the 0.1 Hz to 10 Hz range would be the worst.  Lower than that, 
it's essentially constant.  Higher than that and it's vibration (and 
your phone hand is probably moving anyway).  This would set the 
timescale at which we can re-center the image.  If my guess is correct, 
it'd be tens of seconds, which might be annoying.

The good news is that you don't need to implement this as a system 
service to test if it works.  You can just write an app that displays 
some text or image and applies some correction, and then stare at it 
during your commute to see if it helps.

Robert