CYGM filter

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Example CYGM pattern

CYGM pattern on an image sensor in isometric perspective

In digital photography, the CYGM filter is an alternative color filter array to the Bayer filter (GRGB). It similarly uses a mosaic of pixel filters, of cyan, yellow, green and magenta, and so also requires demosaicing to produce a full-colour image.

CYGM gives more accurate luminance information than the Bayer filter, hence a wider dynamic range, but at the expense of colour accuracy.

The CYGM filter is far less common than the Bayer filter. CCDs that use it include the 3 megapixel Sony ICX252AK and ICS252AKF (which sampled in October 1999^[1]).

Cameras that use it include several Canon models of the 1999-2000 period, such as the Canon PowerShot S10^[2], the original Canon Digital IXUS (June 2000)^[3], though subsequent IXUS models used the Bayer filter, and the Canon G1; the Kodak DCS 620x and DCS 720x DSLRs, and several Nikon Coolpix models^[4].