Patent ID: 7359540

Claim:
A method for generating an estimate of inhomogeneity, said method comprising: acquiring an image; generating a threshold value using the acquired image; generating a first estimate of inhomogeneity using the acquired image; generating a second estimate of inhomogeneity using the acquired image; and generating a final estimate of inhomogeneity using h(x,y)=θ 1 h 1 +θ 2 h 2 + . . . +θ N h N , wherein when N=2, the final estimate of inhomogeneity is generated using h=h 1 +(h 2 −h 1 )*θ wherein h is the final estimate, h 1 is the first estimate, h 2 is the second estimate, and θ is a scalar such that 0<θ<1.