In modern digital camera systems, the captured image undergoes a complex process involving various image signal processing (ISP) techniques to reproduce the observed scene as accurately as possible while preserving bandwidth. On the most basic level, most CCD and CMOS image sensors use the Bayer pattern filter, where 50% of the pixels are green, 25% are red and 25% are blue (corresponding to the increased sensitivity of the human eye to the green color). Demosaicing, also known as debayering, is an important part of any ISP pipeline whereby an algorithm reconstructs the missing RGB components/channels of each pixel by performing interpolation of the values collected for individual pixels.
