DRIVING ASSISTANCE DEVICE AND RAINDROP DETECTION METHOD THEREFOR.

摘要

A driving assistance device (1) comprises: an imaging means (10) mounted on a moving body and which captures peripheral images (I) including part of said moving body; a first edge line storage means (22) storing a first edge line (E1) detected from a first peripheral image (I) captured by the imaging means (10) during normal operation; and a calculation means (23) that calculates the degree of correspondence between the first edge line (E1) and a second edge line (E2) detected from a second peripheral image (I) currently captured by the imaging means (10). A raindrop determination means (24) determines that raindrops have adhered to a lens section of the imaging means (10), from a reduction in the degree of correspondence between the first edge line (E1) and the second edge line (E2).