Patent ID: 7020344

Claim:
A subroutine in a method of blurring, said subroutine comprising the steps of: deriving a noisy artifact exhibiting a color green; selecting a less noisy artifact exhibiting a color green; subdividing the noisy artifact into a plurality of windows; subdividing each of the plurality of windows into a plurality of squares; subdividing the less noisy artifact into a plurality of windows corresponding to the plurality of windows of the noisy artifact; subdividing each of the plurality of windows of the less noisy artifact into a plurality of squares corresponding to the plurality of squares of the noisy artifact; determining a difference between a square at a centrum of a window of the less noisy artifact and all of the other squares within the window of the less noisy artifact; weighting the difference between a square at a centrum of a window of the less noisy artifact and said other squares by multiplying the difference by a multiplying factor; varying the step of weighting by (a) 75% for the square of the window of the noisy artifact which is less than the square at the centrum of the window of the noisy artifact and (b) 25% for each square of the window of the noisy artifact which is not less than the square at the centrum of the window of the noisy artifact; summing all of the values for said other squares as so weighted; multiplying a value for each one of said other squares of the window of the noisy artifact by results of the step of summing; summing said results of the step of multiplying for each of said other squares of the window of the noisy artifact; and dividing said results of the step of summing said results, by the result of the step of summing all of the values for said other squares.