digital photography Digital photography uses cameras containing arrays of electronic photodetectors interfaced to an analog-to-digital converter (ADC) to produce images focused by a lens, as opposed to an exposure on photographic film. The digitized image is sto ...

, the RGBE filter is an alternative

color filter array In digital imaging, a color filter array (CFA), or color filter mosaic (CFM), is a mosaic of tiny color filters placed over the pixel sensors of an image sensor to capture color information. The term is also used in reference to e paper devices ...

to the

Bayer filter A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color filters on a square grid of photosensors. Its particular arrangement of color filters is used in most single-chip digital image sensors used in digital cameras, camco ...

(GRGB). It similarly uses a mosaic of pixel filters, of

red Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–740 nanometres. It is a primary color in the RGB color model and a secondar ...

green Green is the color between cyan and yellow on the visible spectrum. It is evoked by light which has a dominant wavelength of roughly 495570 Nanometre, nm. In subtractive color systems, used in painting and color printing, it is created by ...

blue Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when obs ...

and "emerald" ("like

cyan Cyan () is the color between green and blue on the visible spectrum of light. It is evoked by light with a predominant wavelength between 490 and 520 nm, between the wavelengths of green and blue. In the subtractive color system, or CMYK color ...

" according to Sony), and so also requires

demosaicing A demosaicing (also de-mosaicing, demosaicking or debayering) algorithm is a digital image process used to reconstruct a full color image from the incomplete color samples output from an image sensor overlaid with a color filter array (CFA). It is ...

to produce a full-color image. It was developed by

Sony , commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional ...

and so far is used only in the ICX456 8-megapixel CCD and in the

Sony Cyber-shot DSC-F828 The Sony Cyber-shot DSC-F828 is a 8.0 megapixel digital bridge camera announced by Sony on August 15, 2003. Overview As successor of the DSC-F717, F828 was widely considered "revolutionary" at launch. Major changes / improvements over its predec ...

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".Sony announce new RGBE CCD
press release, DPReview.com, 15 July 2003. Image:RGBE filter.svg, The RGBE array uses a fourth color,

, as well as

and

Image:Bayer pattern.svg, Compare with the earlier

, with twice the number of pure green cells (while cyan colored light is a mix of green and blue, so sensors for that color also detects green and blue colors)

References

Image sensors Color filter array {{photo-stub

See also

References