1. An image processing apparatus comprising: an image acquisition unit configured to acquire a first image capturing a surrounding area of an automobile including a first area and a second image capturing a surrounding area of the automobile including a second area adjacent to the first area; an outline detector configured to perform outline detection on the first image and the second image and to generate a first outline and a second outline respectively; a determiner configured to determine whether the first outline and the second outline each include an outline of a same object; and a area selector configured to perform area setting and perspective conversion on the first image or the second image when the determiner determines that the first outline and the second outline include an outline of the object, so that in a combined image generated by combining at least the first image and the second image, the first outline and the second outline are continuous at the object.