Vehicle monitoring device, vehicle monitoring method and vehicle monitoring program

A vehicle monitoring method comprising:

• a step of determining whether an object shown in an image taken by a camera that takes an image of a surrounding area behind a host vehicle is a two-wheel vehicle or not;
• and
• a step of issuing a warning to a driver when an inter-vehicle distance between the object and the host vehicle becomes equal to or less than a first distance in a case where the object is determined not to be a two-wheel vehicle, and issuing a warning to a driver when the inter-vehicle distance between the object and the host vehicle becomes equal to or less than a second distance, which is longer than the first distance, in a case where the object is determined to be a two-wheel vehicle.

A non-transitory computer readable medium storing a vehicle monitoring program causing a computer to execute:

• processing of determining whether an object shown in an image taken by a camera that takes an image of a surrounding area behind a host vehicle is a two-wheel vehicle or not;
• and
• processing of issuing a warning to a driver when an inter-vehicle distance between the object and the host vehicle becomes equal to or less than a first distance in a case where the object is determined not to be a two-wheel vehicle, and issuing a warning to a driver when the inter-vehicle distance between the object and the host vehicle becomes equal to or less than a second distance, which is longer than the first distance, in a case where the object is determined to be a two-wheel vehicle.