両眼の角膜反射像による３次元注視点の評価

抄録

The model-based method used for gaze estimation can obtain the 3D point-of-gaze by calculating the intersection with binocular visual axes. However, the estimated 3D point-of-gaze is unstable, and thus, error metrics are essential for evaluation. In this paper, we propose a method to evaluate the estimated 3D point-of-gaze using the similarity of scene reflection images extracted from the corneal surfaces. This method is based on a hypothesis that the similarity of the scene reflection on the binocular corneal surface is significantly reduced when the error of point-of-gaze is large. In evaluation experiments, we intentionally added an error to the coordinates of the 3D point-of-gaze, and we confirmed that the similarity of the scene reflection could be used for an error metric.