Edges
Linear Operator
Let X and Y be vector spaces containing
vectors x and y respectively. Then an operator
(or mapping or transformation) S of X into Y
exists if we assign a unique y for each x in X;
we denote y by S(x). S is a linear
operator if, for any x and v in X and any
scalar c, we have, S(x + v) = S(x) + S(v) and S(cx) =
cS(x).
Noise
Shannon's Theorem
Spatial Frequency