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A driver visual attention model
Published June 14, 1999 by ISATA - Dusseldorf Trade Fair in United Kingdom
Event: ISATA 1999
This paper describes a driver visual information acquisition model which gathers information based on a selective process so events such as distractions can be modeled. This model is designed to have realistic visual information gathering capabilities and visual attention mechanisms based on subjective and objective factors. As the design of this model is focused on applicability, the model's framework was designed to be integrated as a component processor for microscopic computer traffic simulation models. The model determines visual attention using two mechanisms: internal and external focusing. The Internal Focusing Mechanism is a proactive attention director. This subjective-based mechanism moves the head and eye to a general direction such that information relevant to the current task is actively searched for based on the driver's expectancy. The External Focusing Mechanism is a reactive attention director based on the characteristics of the objects within the driver's visual field. External control allows for distractions to be modeled, since irrelevant information may objectively demand higher attention than relevant information. For each visible object, these two control mechanisms determine its Attention Demand Valve (ADV). Visual information from the object with the highest ADV is then acquired. The ADV also plays a role in determining the information processing time and amount of attention allocated to driving. With the use of this model and its input of various internal and external variables, it is hoped that a variety of driver types with varying visual abilities (age-related, intoxicated) can be simulated.