Stochastic Image Processing (Information Technology: Transmission, Processing and Storage)

"An image will be modeled as a random field : Y = {Ys : s}, where = {(i,j)|0 i N1 - 1, 0 j N2 - 1} is an index set, a set of site indices on a 2-D discrete N1 x N2 rectangular integer lattice as depicted in Figure 1.1."