The PalmDriver (formerly TwinTowers)
is an electronic device based on IR technology which consists of 8 sets
of 4 sensing elements arranged as the vertical edges of a
At the time (1995) the first prototype was
realized, we used only two sets of elements so that the shape of the
beams reminded the profile of the “late” TwinTowers in New York to us.
The measurements of distance of the different zones of the hands’ palm
are performed by the amount of reflected light captured by the
receivers and are quite accurate in respect to the irregularity and
color of the hands’ palms.
The PalmDriver is stable and responsive; as a
consequence, sounds generated by the computer evoke on the performer
the sensation of “touching
the sound”. video
processing technology has been used for realizing Handel System: a CCD
is connected to a video grabber card; the digital image is then
analyzed as the reconstructed image consisting of those pixels whose
greater than a predefined threshold and color.
Panes are defined
dynamically; x-y position and dimensions of the frames inside panes are
see paper : Handel,
a free-hands gesture
system (CMMR2004 - Springer)
On the basis of Handel, the Imaginary Piano has been
realized: here a single rectangle - with a small thickness, as long as
the horizontal dimension of the video capture area - is defined
at the height where the keyboard usually lies.
When a finger, or a
hand, crosses that strip downward, the systems reports proper
information regarding the “key number” and a specific message is issued
accordingly to “where” and "how fast" the rectangle has been
crossed. Information is used for controlling an algorithmic
compositions rather than for playing scored music. video