Matrixing, number of color channels, and color gamut of camera devices

In this paper we investigate the relationship between matrixing methods, the number of filters adopted and the size of the color gamut of a digital camera. The color gamut is estimated using a method based on the inversion of the processing pipeline of the imaging device. Different matrixing methods are considered, including an original method developed by the authors. For the selection of a hypothetical forth filter, three different quality measures have been implemented. Experimental results are reported and compared.