PROBLEM TO BE SOLVED: To provide the driver of a vehicle with a highly reliable familiarity score in accordance with a detailed condition of a road currently traveling on.SOLUTION: A method includes the steps of: generating a scene feature amount describing a scene of a current road; identifying a road scene cluster corresponding to the current road from plural road scene clusters defined in a familiarity degree graph storing plural scene feature amounts that described road scenes that a user has experienced in the past; and generating a familiarity degree index that estimates the familiarity degree of the user on the current road scene, on the basis of a position of the scene feature amount of the current road scene in the identified road scene cluster.SELECTED DRAWING: Figure 10
REAL-TIME GENERATION OF FAMILIARITY DEGREE INDEX OF DRIVER ON DYNAMIC ROAD SCENE