ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,731,274, issued on Sept. 8, was assigned to HITACHI ASTEMO LTD. (Hitachinaka, Japan).

"External environment recognition device" was invented by Hideaki Kido (Tokyo) and Hirotomo Sai (Hitachinaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An external environment recognition device includes: a road surface height estimation unit that estimates a height of a road surface on which an object is positioned in an image captured by a monocular camera installed in a vehicle; a road surface height reliability estimation unit that calculates reliability of a height of the road surface estimated by the road surface height estimation unit; and an object d...