Demosaicking

Definition:Demosaicking is the process of recovering the color information in the systems, which use only a single image sensor.

Cost-effective consumer electronic devices use only a single image sensor to capture the visual scene. The monochromatic nature of the sensor necessitates covering its surface by a color filter array (CFA) which is used to capture all the three, Red-Green-Blue (RGB) primary colors at the same time. Since the single-sensor allows only one color to be measured at each spatial location, the acquired CFA image data constitute a mosaic-like gray-scale image. To recover the color information (Figure 1), the two missing color components must be determined from the adjacent pixels. This estimation process is commonly termed demosaicking, but it is also known as CFA interpolation or color interpolation [1], [2], [3].

Figure 1.

Demonstration of a demosaicking concept.