Patent ID: 7920751

Claim:
An imaging system comprising: a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object; and a computer programmed to: acquire imaging data for the plurality of cells; identify a cell to be corrected, based on the imaging data; interpolate I x and I y for the identified cell based on neighbor cells; calculate local gradients g x and g y between the identified cell and its neighbor cells based on the interpolation; calculate weighting factors w x and w y based on the local gradients, wherein the weighting factors w x and w y are calculated according to w x =  g y   g x  +  g y  ; and ⁢ ⁢ w y = 1 - w x ; calculate a corrected final value I(0,0) for the identified cell based on the calculated weighting factors; and correct the identified cell with the corrected final value.