IMAGE CONTROL METHOD AND IMAGE CONTROL DEVICE

In an image control method, processing including: generating a road image representing an own lane (162) and one or more other lanes (163a to 163d) existing on at least one lateral side of the own lane and including at least adjacent lanes (163a, 163b) ; and generating lane change images (161a, 161b) by, in a case where the own vehicle is caused to perform a lane change by autonomous travel control, when a target lane determined as a destination lane of a lane change is one of the displayed other lanes (163a to 163d), superimposing a first course display (164a) representing a course in which a lane change to the target lane included in the displayed other lanes is performed on the road image and, when the target lane is none of the displayed other lanes, superimposing a second course display (164b) representing a course in which a lane change from the own lane to one of the displayed other lanes is performed and a lane change to an outer side of the displayed other lanes is further performed on the road image is performed.