IMAGE PROCESSOR AND IMAGE PROCESSING METHOD

An image processor (100) includes a line extraction portion (111) configured to extract a line from an image (G) generated from a surrounding image of a vehicle (V) captured by an imaging device (20) at a predetermined timing, a tracking determination portion (113) configured to determine whether the extracted line fulfills a predetermined condition or not, a comparing portion (114) configured to compare the line that is determined as fulfilling the predetermined condition with a line that is extracted by the line extraction portion (111) from an image (G) generated from a surrounding image of the vehicle (V) captured by the imaging device (20) at a predetermined timing in past to obtain degrees of similarity and coincidence thereof, a parking area line determination portion (115) configured to determine the line as a parking area line when the obtained degrees of similarity and coincidence are equal to or more than a given value, and a parking frame setting portion (116) configured to set a parking frame by using the line that is determined as the parking area line.