A new restoring algorithm for the preferential enhancement of edge gradients
B. Roy Frieden · Journal of the Optical Society of America · 1976
We present here a new restoring algorithm that is based on use of a “median-window filter.” This is intrinsically a nonlinear operation that, when cyclically used with any linear restoring algorithm, can typically enhance edge gradients by a factor of 5:1 with nearly a complete absence of Gibbs oscillation.