IMAGE PROCESSING DEVICE

An image processing device includes an image acquiring unit, a detection unit, and a display processing unit. The image acquiring unit is configured to acquire a captured image from an image capturing device configured to capture an image of the periphery of a vehicle. The detection unit is configured to detect a lane marker defining a traveling track of the vehicle from the captured image acquired by the image acquiring unit. The display processing unit is configured to display, on a display device, a superimposition image as the captured image on which a marker image for supporting visibility of the lane marker is superimposed such that the marker image is superimposed on the lane marker detected by the detection unit.