X-Trans Filter
An alternative colour filter array using a six-by-six pattern with green in every row and column.
Formula / rule
6×6 repeating unit
In depth
The larger, less regular pattern breaks up the periodicity that causes moiré, which allowed the design to omit an optical low-pass filter and gain apparent sharpness. The cost is that demosaicing is more complex, and some raw converters historically rendered fine foliage with a smeared, watercolour-like texture.
Examples in practice
An X-Trans sensor photographs a fine herringbone jacket without the colour moiré a Bayer sensor might produce.