A decomposition theorem and its implications to the design and realization of two-dimensional filters
A. Venetsanopoulos, B.G. Mertzios · IEEE Transactions on Acoustics Speech and Signal Processing · 1985
It is shown that an arbitrary rational 2-D transfer function can be expanded in first order terms, each one of which is a function of only one of the two variables. This method leads naturally to reconfigurable filters with great modularity and parallelism, which can realize any rational transfer function up to a given order.