The goal for this learning task is to classify a subset of Auslan
(Australian sign language, the language of the Australian Deaf
community) signs. Instances of the signs were collected using an
instrumented glove
. The domain consists of eight channels: x
(left/right), y (up/down), and z (away/towards the body) position,
wrist roll (whether the palm is facing up or down), thumb, fore,
middle and ring finger bend. This information is updated approximately
23 times a second. Thus each frame consists of the value of these
eight channels at an instant in time. The signs were collected one at
a time starting and ending at a fixed point (a closed fist at the side
of the body). The average number of frames per sign was 51, but varied
from 30 frames up to 102 frames.
Figure 3 shows two signs from the Auslan domain. The top part shows the gloss (dictionary definition) of the sign from the Auslan dictionary [Johnston, 1989]. The lower part shows some of the rules extracted by TClass.