Use of a DNN in Recording and Analysis of Operator Attention in Advanced HMI Systems

Abstract

The main objective of this research was to propose a smart technology to record and analyse the attention of operators of transportation devices where human–machine interaction occurs. Four simulators were used in this study: General Aviation (GA), Remotely Piloted Aircraft System (RPAS), AS 1600, and Czajka, in which a spatio-temporal trajectory of system operator attention describing the histogram distribution of cockpit instrument observations was sought. Detection of the position of individual instruments in the video stream recorded by the eyetracker was accomplished using a pre-trained Fast R-CNN deep neural network. The training set for the network was constructed using a modified Kanade–Lucas–Tomasi (KLT) algorithm, which was applied to optimise the labelling of the cockpit instruments of each simulator. A deep neural network allows for sustained instrument tracking in situations where classical algorithms stop their work due to introduced noise. A mechanism for the flexible selection of Area Of Interest (AOI) objects that can be tracked in the recorded video stream was used to analyse the recorded attention using a mobile eyetracker. The obtained data allow for further analysis of key skills in the education of operators of such systems. The use of deep neural networks as a detector for selected instrument types has made it possible to universalise the use of this technology for observer attention analysis when applied to a different objects-sets of monitoring and control instruments.

Keywords

• eye tracking
• deep neural network
• attention trajectory
• HMI systems