The term debayering generally describes an algorithm that calculates the color image from the image sensor data. However, as the image sensor does not provide color values for each color in each individual pixel, the algorithm must interpolate to determine that information. Cameras typically offer 2x2 debayering, whereby the two closest pixels are used to calculate the actual color of the image. This can lead in some cases to uneven edges between colors and other artifacts. The 5x5 debayering used in the PGI feature set delivers cleaner transitions between colors and eliminates artifacts altogether.
At the same time, the optimized debayering also assists with noise suppression.