Information processing system, information processing method, and readable medium

1. An information processing system, comprising:

at least one processor, and

a display,

wherein

the at least one processor, in operation:

acquires a driving environment of a vehicle, the driving environment being composed of N-dimensional parameters and represented as a point in an N-dimensional coordinate system, where N is an integer of 3 or greater and the N-dimensional parameters include a vehicle speed parameter, a steering angle parameter, an inter-vehicular distance parameter, or a relative speed parameter;

refers to an ideal driving driver model indicating an ideal driving environment region defined in the N-dimensional coordinate system;

selects an ideal driving environment included in the ideal driving environment region based on a distance between the ideal driving environment region and the point representative of the acquired driving environment in the N-dimensional coordinate system; and

outputs, on the display, recommendation information for bringing the driving environment of the vehicle closer to the selected ideal driving environment.

2. The information processing system according to claim 1 , wherein when selecting the ideal driving environment, the at least one processor selects an ideal driving environment having the shortest distance, to the point representative of the acquired driving environment, within the ideal driving environment region.

3. The information processing system according to claim 1 , wherein the recommendation information outputted on the display includes information for recommending that a driver of the vehicle changes a driving operation amount that is at least one of a steering angle, a depression amount of a brake, or a depression amount of an accelerator.

4. The information processing system according to claim 3 , wherein

the at least one processor calculates a difference between the point representative of the acquired driving environment of the vehicle and the selected ideal driving environment, and

determines the driving operation amount for reducing the difference, and

the recommendation information outputted on the display indicates a current driving operation amount and the determined driving operation amount.

5. The information processing system according to claim 1 , wherein

the at least one processor:

refers to a plurality of the ideal driving driver models indicating ideal driving environment regions that are different from one another in the N-dimensional coordinate system; and

outputs, on the display, the ideal driving environment regions that are different from one another and the point representative of the acquired driving environment of the vehicle.

6. The information processing system according to claim 5 , wherein when the point is located within a first region that is one of the ideal driving environment regions, the at least one processor outputs, on the display, an icon indicating that the driving environment of the vehicle is an ideal driving environment corresponding to the first region.

7. The information processing system according to claim 1 , wherein

the at least one processor:

models, based on a degree of similarity between driving behavior histories of a plurality of model drivers and a driving behavior history of a driver driving the vehicle, driving behavior histories of at least one or more model drivers from among the driving behavior histories of the plurality of model drivers, and constructs an ideal behavior driver model which correlates behaviors of vehicles driven by the at least one or more model drivers and travel environments; and

estimates, as a behavior of the vehicle, a behavior associated with a travel environment of the vehicle driven by the driver in the constructed ideal behavior driver model.

8. An information processing method, comprising:

acquiring a driving environment of a vehicle, the driving environment being composed of N-dimensional parameters and represented as a point in an N-dimensional coordinate system, where N is an integer of 3 or greater and the N-dimensional parameters include a vehicle speed parameter, a steering angle parameter, an inter-vehicular distance parameter, or a relative speed parameter;

referring to an ideal driving driver model indicating an ideal driving environment region defined in the N-dimensional coordinate system;

selecting an ideal driving environment included in the ideal driving environment region based on a distance between the ideal driving environment region and the point representative of the acquired vehicle driving environment in the N-dimensional coordinate system; and

displaying recommendation information for bringing the driving environment of the vehicle closer to the selected ideal driving environment.

9. The information processing method according to claim 8 , wherein the selecting includes selecting an ideal driving environment having the shortest distance, to the point representative of the acquired driving environment, within the ideal driving environment region.

10. The information processing method according to claim 8 , wherein the recommendation information includes information for recommending that a driver of the vehicle changes a driving operation amount that is at least one of a steering angle, a depression amount of a brake, or a depression amount of an accelerator.

11. The information processing method according to claim 10 , comprising:

calculating a difference between the point representative of the acquired driving environment of the vehicle and the selected ideal driving environment; and

determining the driving operation amount for reducing the difference;

wherein, the recommendation information indicates a current driving operation amount and the determined driving operation amount.

12. The information processing method according to claim 8 , comprising:

referring to a plurality of the ideal driving driver models indicating ideal driving environment regions that are different from one another in the N-dimensional coordinate system; and

displaying the ideal driving environment regions that are different from one another and the point representative of the acquired driving environment of the vehicle.

13. The information processing method according to claim 12 , comprising:

when the point is located within a first region that is one of the ideal driving environment regions, displaying an icon indicating that the driving environment of the vehicle is an ideal driving environment corresponding to the first region.

14. A non-transitory machine-readable recording medium that stores a program that causes a computer to execute:

acquiring a driving environment of a vehicle, the driving environment being composed of N-dimensional parameters and represented as a point in an N-dimensional coordinate system, where N is an integer of 3 or greater and the N-dimensional parameters include a vehicle speed parameter, a steering angle parameter, an inter-vehicular distance parameter, or a relative speed parameter;

referring to an ideal driving driver model indicating an ideal driving environment region defined in the N-dimensional coordinate system;

selecting an ideal driving environment included in the ideal driving environment region based on a distance between the ideal driving environment region and the point representative of the acquired vehicle driving environment in the N-dimensional coordinate system; and

displaying recommendation information for bringing the driving environment of the vehicle closer to the selected ideal driving environment.

15. The non-transitory machine-readable recording medium according to claim 14 , wherein the selecting includes selecting an ideal driving environment having the shortest distance, to the point representative of the acquired driving environment, within the ideal driving environment region.

16. The non-transitory machine-readable recording medium according to claim 14 , wherein the recommendation information includes information for recommending that a driver of the vehicle changes a driving operation amount that is at least one of a steering angle, a depression amount of a brake, or a depression amount of an accelerator.

17. The non-transitory machine-readable recording medium according to claim 16 , wherein the program causes the computer to execute:

calculating a difference between the point representative of the acquired driving environment of the vehicle and the selected ideal driving environment; and

determining the driving operation amount for reducing the difference;

wherein, the recommendation information indicates a current driving operation amount and the determined driving operation amount.

18. The non-transitory machine-readable recording medium according to claim 14 , wherein the program causes the computer to execute:

referring to a plurality of the ideal driving driver models indicating ideal driving environment regions that are different from one another in the N-dimensional coordinate system; and

displaying the ideal driving environment regions that are different from one another and the point representative of the acquired driving environment of the vehicle.

19. The non-transitory machine-readable recording medium according to claim 18 , wherein the program causes the computer to execute:

when the point is located within a first region that is one of the ideal driving environment regions, displaying an icon indicating that the driving environment of the vehicle is an ideal driving environment corresponding to the first region.

20. The non-transitory machine-readable recording medium according to claim 14 , wherein the program causes the computer to execute:

modeling, based on a degree of similarity between driving behavior histories of a plurality of model drivers and a driving behavior history of a driver driving the vehicle, driving behavior histories of at least one or more model drivers from among the driving behavior histories of the plurality of model drivers;

constructing an ideal behavior driver model which correlates behaviors of vehicles driven by the at least one or more model drivers and travel environments; and

estimating, as a behavior of the vehicle, a behavior associated with a travel environment of the vehicle driven by the driver in the constructed ideal behavior driver model.