An image processor includes an acquisition unit configured to acquire a camera image captured by a camera provided on a vehicle, a first image converter configured to project the camera image onto a flat surface to convert the camera image into a flat surface projection image, and a second image converter configured to project the camera image onto a curved surface to convert the camera image into a curved surface projection image. The first image converter converts a first image region having a predetermined width within the camera image into the flat surface projection image, and the second image converter converts a second image region outside the first image region in a width direction, within the camera image, into the curved surface projection image.