1. A method of generating a multi-viewpoint image, the method comprising: acquiring at least one reference-viewpoint image; generating unit image information of a virtual-viewpoint image on the basis of unit image information of the at least one reference-viewpoint image, the unit image information of the virtual-viewpoint image being generated without generating intermediate virtual viewpoint images; multiplexing the unit image information of the at least one reference-viewpoint image and the unit image information of the virtual-viewpoint image; and generating a multi-viewpoint image by performing an interpolation process on occluded areas between the multiplexed unit image information using the multiplexed unit image information.