W05-1608 |
decision , which kind of pointing ,
|
object-pointing
|
or region-pointing , is appropriate
|
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means whether pointing alone (
|
object-pointing
|
) yields the referent in an unambiguous
|
W05-1608 |
do so , the pointing cone for
|
object-pointing
|
is generated . In this example
|
W05-1608 |
apex angle α , the cone for
|
object-pointing
|
. If this map contains at least
|
W05-1608 |
two referential functions called
|
object-pointing
|
and region-pointing . 2 Pointing
|
W05-1608 |
table , the smaller ellipse w.r.t.
|
object-pointing
|
, the bigger one w.r.t. region-pointing
|
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an object , it is said to have
|
object-pointing
|
function . If the gesture draws
|
W05-1608 |
wider apex angle than the cone for
|
object-pointing
|
to ensure robust reference and
|
W05-1608 |
defines the borderline up to which
|
object-pointing
|
can be conducted successfully
|
W05-1608 |
Considering the Spatial Context :
|
Object-pointing
|
vs. Region-pointing If we assume
|
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properties R. To decide whether
|
object-pointing
|
or region-pointing is ap - propriate
|
W05-1608 |
of pointing are distinguished ,
|
object-pointing
|
and region-pointing . With the
|
W05-1608 |
of their discriminatory power .
|
Object-pointing
|
can only be used if the gesture
|
W05-1608 |
referential functions of pointing , i.e.
|
object-pointing
|
and region-pointing , comes with
|
W05-1608 |
function . The distinction between
|
object-pointing
|
and regionpointing is closely
|
W05-1608 |
point ; b ) pointing cones for
|
object-pointing
|
and region-pointing are generated
|