1. A color filter array comprising: at least one first color filter; at least one second color filter; and at least one third color filter, wherein the third color filter is a luminance element and has a larger area than the at least one first or second color filter; wherein the color filter array comprises a plurality of third color filters, first color filters and second color filters, and wherein the ratio of third color filters to first and second color filters is 4:2:2, respectively, and wherein each third color filter is formed as an octagon.