1. A mobile terminal, comprising: a display unit; a camera arranged with a plurality of lenses along a plurality of lines; and a controller configured to: capture images entered through the plurality of lenses, and display a first image on the display unit among a plurality of captured images; change at least one region of the first image to at least part of an image different from the first image among the plurality of images based on a user's selection; extract images subject to synthesis corresponding to an image displayed in one region of the first image from the plurality of images, respectively, when one region of the first image is selected; and synthesize any one of the images subject to synthesis based on the user's selection with an image of a remaining portion of the first image excluding the one region, wherein the any one of the images subject to synthesis based on the user's selection is determined based on a touch direction of a touch input applied to the one region of the first image.