Figure 1From: Classification of extreme facial events in sign language videosGSL continuous signing example. On frames’ top: frame number (black), gloss transcriptions across frames (blue) and facial events (red). Concerning sentence structure, the linguistic event of alternative construction consists of two conjunctive parts: PASSPORT or ID-CARD. Notice how the visual event of pose over roll extreme angles marks these two parts. Such visual events of extreme states we aim to detect. For more details, see in text.Back to article page