The first video demonstrats detection of a wh-question non-manual marker. Tracked face and head is shown on left, while the right image shows the extracted spatial pyramid features. Red bars indicate detection of the wh non-manual marker, while blue bars indicate that the system detects no wh non-manual marker.
In the second video we demonstrate that we are able to track eyebrow height (top right) and head pitch angle (bottom right) in an isolated utterance of wh-question. The red graph line is used to identify the segment of the sequence over which the nonmanual marker is being produced. Lowered eyebrows correspond to a wh-question marker being present.