紀要論文

赤外線を用いた非接触瞳孔径測定手法

Non-contact Measurement of Pupil Diameter using Infrared Light

jpn

24321192

https://doi.org/10.15002/00026284

法政大学大学院情報科学研究科

法政大学大学院紀要. 情報科学研究科編

18

1

6

2023-03-24

Version of Record

Medical reports said that the autonomic nerves such as sympathetic and parasympathetic nerves caused changes in pupil diameter regardless of the user ’s intention. Based on this idea, this paper proposed a non-contact pupil diameter measurement method to show internal information such as stress and emotion. A pupil diameter measurement system mainly consists of a device and an algorithm. For a device, infrared camera is usually used to take advantage of the different absorption rates of infrared light in the pupil and iris. In this paper, we assembled an infrared camera by remodeling a commercially available web camera. For an algorithm, we proposed a method that first detects the iris region from the facial video using MediaPipe and directly calculates the pupil diameter using the pixel gradient information in that region. Experimental results showed that the mean absolute error (MAE) was 3.9 px and the mean absolute percentage error (MAPE) was 24.5 % for 51 subjects. Our proposed system showed the highest accuracy compared to existing algorithms. As an application domain, we measured temporal changes in pupil diameter while playing PC games. Six subjects in this experiment showed the similar tendency of the changes.

Article

AA12746425