Patent ID: 8311313

Claim:
An imaging apparatus for inspecting objects located within moving articles, said imaging inspection apparatus comprising: a plurality of at least one imaging inspection device positioned on said frame and adapted for directing beams onto said articles as said articles through said inspection location substantially within said imaging apparatus to thereby inspect said articles, and for providing output signals as a result of said inspecting; and a processing and analysis assembly for receiving said output signals from said plurality of imaging inspection devices and for performing table lookups and simple multiplication, said table having a particular form adequate to correct nonlinearities matching a cubic polynomial; and including: a) an offset X for said lookup, stored for each pixel having the nonlinearity shape parameter ξ where if ξ > 0.05 , i = int ⁡ ( 150.5 + 100 ⁢ log ⁢ ⁢ ξ log ⁢ ⁢ 400 ) ; if i≧200, set i=200, Then X=401i; if ξ < - 0.05 , i = int ⁡ ( 50.5 - 100 ⁢ log ⁢ ⁢ ( - ξ ) log ⁢ ⁢ 400 ) ; if i≦0, set i=0, Then X=401i; otherwise, X=40100; b) the parameter τ also stored for each pixel; and c) a count of N is collected in a dwell of duration D, then the correction factor is stored at location X+n in said table where n = int ⁢ { 200 ⁢ N ⁢ ⁢ τ D + 300.5 } where: X is an integer value, i is an integer, τ is a scale factor with units of time per count or time per pulse, and n is an integer.