Guest – Lecture 14 (Gaze Interaction) Flashcards
Gaze Principles
- Gaze signals ______
- Gaze is a natural _______
- Gaze can be _______ _______
- Gaze is f_____
- Gaze precedes _______
- Gaze follows _______
- Gaze guides ________
- Gaze reflects _______
- Gaze is s______
- Gaze is u______
- Gaze signals interest
- Gaze is a natural pointer
- Gaze can be deliberately different
- Gaze is fuzzy
- Gaze precedes action
- Gaze follows movement
- Gaze guides perception
- Gaze reflects context
- Gaze is social
- Gaze is ubiquitous
Identify the main principle contained in the snippet and justify your answer.
“This paper investigates novel ways to direct computers by eye gaze. Instead of using fixations and dwell times, this work focuses on eye motion, in particular, gaze gestures. Gaze gestures are insensitive to accuracy problems and immune against calibration shift.”
Principle: Gaze can be deliberately different
Explanation: The snippet describes a system that employs gaze gestures. These are sequences of saccades that are substantially different from natural visual scanning behaviour. By looking for these specific sequences, the system can safely distinguish it from other natural behaviours and determine that the input was deliberate. The snippet also discusses how the technique is advantageous regarding calibration. Because it only depends on relative eye movements (rather than absolute gaze coordinates), the system does not necessarily need to be calibrated and can still work even if the calibration deteriorates over time.
Identify the main principle contained in the snippet and justify your answer.
“Once the system is calibrated, the user is ready to use EyePoint. The user simply looks at the desired point on the screen and presses a hotkey for the desired action. EyePoint then brings up a magnified view of the region the user was looking at. The user looks at the target again in the magnified view and releases the hotkey. This results in the appropriate action being performed on the target.”
Principle: Gaze is fuzzy
Explanation: The snippet describes a way of overcoming the inherent inaccuracies in gaze pointing, due to the jittery movement of the eyes, the gaze estimation error, and the fact that human vision is described in terms of a region, rather than a point. The technique sidesteps these issues in two ways: first, by requiring the user to confirm a selection with an additional input modality (by pressing a hotkey); second, by increasing the size of the GUI, therefore making it easy to disambiguate which target the user is looking at.
