DRIVING ASSISTANCE DEVICE AND ADJACENT VEHICLE DETECTION METHOD THEREFOR

摘要

A driving assistance device 1 provides a driver of an own vehicle V with various pieces of information from a result of capturing image around the own vehicle V, and includes a candidate reflection region detector 34 that detects, within an image capturing region whose images are captured by a camera 10, a high-brightness region in which brightness is equal to or higher than a predetermined threshold value; a predetermined position brightness detector 35 that detects brightness of a position located in a straight-line direction linking a position of the high-brightness region detected by the candidate reflection region detector 34 and the camera 10, and separated from the own vehicle V by a predetermined distance, in a state of viewing the vehicle from above; a brightness difference detector 36a that detects a difference between a brightness value of the high-brightness region detected by the candidate reflection region detector 34 and a brightness value of the position detected by the predetermined position brightness detector 35; and an adjacent vehicle detector 36b that detects an adjacent vehicle within the image capturing region, based on the difference of brightness detected by the brightness difference detector 36a.