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Glossary Terms
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When a digital sensor is equipped with a color filter array (such as a Bayer filter), each individual pixel only records the light intensity for one particular color: red, blue, or green. In order to reconstruct a full-color image with RGB values at each pixel, the raw data must be processed through a software algorithm which interpolates the "missing" color values at each photosite. This is called demosaicing, referring to the "mosaic" of filters over the sensor.

Demosaicing algorithms need to be implemented carefully, in order to optimize the resolution of the image, but without causing unwanted color moiré when the image contains fine lines or grid patterns at spacings approaching those of the color filter array.