Dynamic perceptive compensation for the rotating snakes illusion with eye tracking

Abstract

This study developed a dynamic perceptive compensation system for the rotating snakes illusion (RSI) with eye tracking. Large eye movements, such as saccades and blinks, were detected with an eye tracker, and perceptive compensation was dynamically performed based on the characteristics of RSI perception. The proposed compensation system considered three properties: spatial dependence, temporal dependence, and individual dependence. Several psychophysical experiments were performed to confirm the effectiveness of the proposed system. After the preliminary verification and determination of the temporal-dependent function for RSI perception, the effects of gaze information on RSI control were investigated. Five algorithms were compared using paired comparison. This confirmed that the compensation system that took gaze information into account reduced the RSI effect better than compensation without gaze information at a significance threshold of p < 0.01, calculated with Bonferroni correction. Some algorithms that are dependent on gaze information reduced the RSI effects more stably than still RSI images, whereas spatially and temporally dependent compensation had a lower score than other compensation algorithms based on gaze information. The developed system and algorithm successfully controlled RSI perception in relation to gaze information. This study systematically handled gaze measurement, image manipulation, and compensation of illusory image, and can be utilized as a standard framework for the study of optical illusions in engineering fields.

Artificial Perception Meets Psychophysics, Revealing a Fundamental Law of Illusory Motion

“…The direction of illusory motion depends on the order of the luminance gradients. Among these variants, the Rotating Snakes illusion (RSI), design art by Prof. Akiyoshi Kitaoka, is particularly well-known for its dramatic illusion of visual motion [1,13,15,18,19]. Compared to the original design of the FWI, the RSI is always perceived in the expected direction, and the strength of perceived illusory motion is more significant.…”