Abstract
In several areas, there is a need to process data that may only adopt a finite number of values. Examples include:* Grayscale digital images can be represented by matrices whose values are integers between 0 (black) and 255 (white);* Evaluations typically take values in a set of the form {0, 1, ..., n}, where n = 5 or n = 10.To express uncertainties regarding these values,one may resort …