Bounds on the capacity of constrained two-dimensional codes
Bounds on the capacity of constrained two-dimensional (2-D) codes are presented. The bounds of Calkin and Wilf apply to first-order symmetric constraints. The bounds are generalized in a weaker form to higher order and nonsymmetric constraints. Results are given for constraints specified by run-length limits or a minimum distance between pixels of a given value.
capacity two-dimensional (2-d) codes constrained codes entropy 2-d fields