Driver monitoring device, driver monitoring method, and non-transitory recording medium

A driver monitoring method comprising:

• performing an autonomous driving control of a vehicle;
• performing a first determination of whether there is a possibility of a driver of the vehicle being in a sleeping state or strongly drowsy state;
• and
• based upon the first determination that there is the possibility of the driver of the vehicle being in the sleeping state or the strongly drowsy state, performing a second determination of whether the driver is using an electronic device, wherein
• the second determination is performed based on an image including a face of the driver captured by a driver monitor camera and behavioral feature information showing a difference between a behavioral feature of the driver when the driver is in the sleeping state or strongly drowsy state and the behavioral feature of the driver when the driver is using the electronic device.

A non-transitory recording medium having recorded thereon a computer program for causing a processor to execute a process comprising:

• performing an autonomous driving control of a vehicle;
• performing a first determination of whether there is a possibility of a driver of the vehicle being in a sleeping state or strongly drowsy state;
• and
• based upon the first determination that there is the possibility of the driver of the vehicle being in the sleeping state or the strongly drowsy state, performing a second determination of whether the driver is using an electronic device, wherein
• the second determination is performed based on an image including a face of the driver captured by a driver monitor camera and behavioral feature information showing a difference between a behavioral feature of the driver when the driver is in the sleeping state or strongly drowsy state and the behavioral feature of the driver when the driver is using the electronic device.