Driver monitoring device, driver monitoring method, and non-transitory computer-readable medium

1. A driver monitoring device comprising:

a processor; and

a memory storing instructions that, when executed by the processor, cause the driver monitoring device to perform operations, the operations comprising:

detecting an unbalanced posture of a driver based on an image of a driver's seat of a vehicle captured by a camera;

determining whether the unbalanced posture of the driver is a habitual unbalanced posture of the driver;

calculating an opening degree of at least one eye of the driver based on the image in a case in which it is determined that the unbalanced posture is other than the habitual unbalanced posture of the driver;

determining whether it is a timing to give a notification to the driver in a case in which the vehicle is traveling and the opening degree is equal to or larger than a first threshold; and

giving the notification to the driver in a case in which it is determined that it is the timing to give the notification.

2. The driver monitoring device according to claim 1 ,

wherein the operations further comprise:

determining that it is the timing to give the notification in a case in which a distance from a current position of the vehicle to a rest place present on a route on which the vehicle is scheduled to travel is less than a second threshold; and

giving, as the notification, a first notification for urging the driver to take a rest at the rest place.

3. The driver monitoring device according to claim 1 ,

wherein the operations further comprise:

determining that it is the timing to give the notification in a case in which a distance from the current position of the vehicle to a place where attention needs to be paid to traveling present on a route on which the vehicle is scheduled to travel is less than a third threshold; and

giving, as the predetermined notification, a second notification for urging the driver to perform safe driving.

4. The driver monitoring device according to claim 3 ,

wherein the place where attention needs to be paid to traveling includes at least one of a frequent accident occurrence point, an accident occurrence point, and a point under construction.

5. The driver monitoring device according to claim 1 ,

wherein the operations further comprise:

determining that it is the timing to give the notification in a case in which it is determined that the driver is in a conversation as a result of analysis of a facial expression of the driver included in the image; and

giving, as the notification, a third notification for urging the driver to concentrate on driving.

6. The driver monitoring device according to claim 1 , further comprising:

determining that it is the timing to give the notification in a case in which it is determined that the driver is in a conversation as a result of analysis of a voice collected by a microphone in the vehicle; and

giving, as the notification, a third notification for urging the driver to concentrate on driving.

7. The driver monitoring device according to claim 1 ,

wherein the determining whether it is a timing to give a notification to the driver is performed further in a case in which the vehicle is traveling and a state in which the opening degree is smaller than the first threshold continues for a period equal to or shorter than a fourth threshold.

8. A driver monitoring method comprising:

detecting an unbalanced posture of a driver based on an image of a driver's seat of a vehicle captured by a camera;

determining whether the unbalanced posture of the driver is a habitual unbalanced posture of the driver;

calculating an opening degree of at least one eye of the driver based on the image in a case in which it is determined that the unbalanced posture is other than the habitual unbalanced posture of the driver;

determining whether it is a timing to give a notification to the driver in a case in which the vehicle is traveling and the opening degree is equal to or larger than a first threshold; and

giving the notification to the driver in a case in which it is determined that it is the timing to give the notification.

9. The driver monitoring method according to claim 8 , further comprising:

determining that it is the timing to give the notification in a case in which a distance from a current position of the vehicle to a rest place present on a route on which the vehicle is scheduled to travel is less than a second threshold; and

giving, as the notification, a first notification for urging the driver to take a rest at the rest place.

10. The driver monitoring method according to claim 8 , further comprising:

determining that it is the timing to give the notification in a case in which a distance from the current position of the vehicle to a place where attention needs to be paid to traveling present on a route on which the vehicle is scheduled to travel is less than a third threshold; and

giving, as the predetermined notification, a second notification for urging the driver to perform safe driving.

11. The driver monitoring method according to claim 10 ,

wherein the place where attention needs to be paid to traveling includes at least one of a frequent accident occurrence point, an accident occurrence point, and a point under construction.

12. The driver monitoring method according to claim 8 , further comprising:

determining that it is the timing to give the notification in a case in which it is determined that the driver is in a conversation as a result of analysis of a facial expression of the driver included in the image; and

giving, as the notification, a third notification for urging the driver to concentrate on driving.

13. The driver monitoring method according to claim 8 , further comprising:

determining that it is the timing to give the notification in a case in which it is determined that the driver is in a conversation as a result of analysis of a voice collected by a microphone in the vehicle; and

giving, as the notification, a third notification for urging the driver to concentrate on driving.

14. The driver monitoring method according to claim 8 ,

wherein the determining whether it is a timing to give a notification to the driver is performed further in a case in which the vehicle is traveling and a state in which the opening degree is smaller than the first threshold continues for a period equal to or shorter than a fourth threshold.

15. A non-transitory computer-readable medium that stores a driver monitoring program, the driver monitoring program, when executed by a processor, causing a computer to perform a process, the process comprising:

detecting an unbalanced posture of a driver based on an image of a driver's seat of a vehicle captured by a camera;

determining whether the unbalanced posture of the driver is a habitual unbalanced posture of the driver;

calculating an opening degree of at least one eye of the driver based on the image in a case in which it is determined that the unbalanced posture is other than the habitual unbalanced posture of the driver;

determining whether it is a timing to give a notification to the driver in a case in which the vehicle is traveling and the opening degree is equal to or larger than a first threshold; and

giving the notification to the driver in a case in which it is determined that it is the timing to give the notification.