Eye Tracking Research Advances With Gaze Probing
A recent paper presented at the International Conference on Pattern Recognition introduced a novel method of eye tracking, know as gaze probing. The goal of gaze probing is to estimate the object that a user focuses on when they are looking at dynamic content. Dynamic content is defined as scrolling images and text on a large display.
The paper, published by the Department of Intelligence Science and Technology Graduate School of Informatics in Kyoto, Japan, states that the majority of methods regularly used perform direct comparison between the positions of objects on a display and the spots the subject gazes at. To identify the point of gaze necessitates some trade off when it comes to the accuracy of positioning and the subject’s ability to move freely.
Typically eye tracking uses a corneal reflection technique, utilizing reactive gaze tracking that requires a camera, for example. The researchers from Kyoto present what is essentially a method based on events. They call their approach “Gaze Probing,” and it’s an interesting method to target the position of a subject’s gaze.
In gaze probing, they use the synchronization of motion in combination with objects and the subject’s gaze, designing events around patterns of motion. By incorporating the “constituent objects” of dynamic content that appears, researchers can design distinct events they hope to be free of measurement error. Gaze direction provides measurements that can be examined with the data collected. They then analyze the synchronization between eye reactions and the events which are built in to the movements of objects that appear onscreen. They evaluate according to the distance between the beginning points of the events on the screen.
The events, as they’re dubbed, are described as short time patterns and small latency of eye movements. They are said to be distinguishable from measurement errors as well as endogenous eye movements.
Gaze Probing: Event-Based Estimation of Objects Being Focused On
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