Lane boundary estimation device and lane boundary estimation method

摘要

A lane boundary estimation device (1) includes: a level difference detection unit (1c) detecting a first part of a solid lane boundary; a base image setting unit (1d) setting a first image area in a most distant area in the first part as a template image; a search area setting unit (1e) setting a search area from the most distant area; and a comparison determination unit (1f) detecting a boundary candidate point for a second part of the solid lane boundary by performing template comparison in the search area. When a detection evaluation value of the first part is lower than a predetermined value and the search area includes a low-evaluation search area, the base image setting unit re-sets a second image area, nearer to a vehicle than the low-evaluation search area, as the template image. The search area setting unit skips the low-evaluation search area and re-sets a new search area.