In digital photography, the RGBE filter is an alternative color filter array to the Bayer filter (GRGB). It similarly uses a mosaic of pixel filters, of red, green, blue and "emerald" ("like cyan" according to Sony), and so also requires demosaicing to produce a full-color image. It was developed by Sony and so far is used only in the ICX456 8 megapixel CCD and in the Sony CyberShot DSC-F828 camera.
Sony states that the reason for adding the fourth filter color is "to reduce the color reproduction errors and to record natural images closer to the natural sight perception of the human eye."
The RGBE array uses a fourth color, cyan, as well as red, green and blue
Compare to the earlier Bayer filter, with twice the green cells