Adaptive gradient weighting technique for detector bad cell...

Image analysis – Image enhancement or restoration

Reexamination Certificate

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C382S300000, C382S132000, C382S128000, C382S131000, C382S133000, C348S246000, C348S272000, C348S273000, C250S200000, C250S559010, C250S559030, C250S559040, C250S559050, C250S559060, C250S559070, C250S559080, C250S559450, C250S559460

Reexamination Certificate

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07920751

ABSTRACT:
An imaging system includes a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object. The imaging system includes a computer programmed to acquire imaging data for the plurality of cells, identify a cell to be corrected, based on the imaging data, interpolate Ixand Iyfor the identified cell based on neighbor cells, and calculate local gradients gxand gybetween the identified cell and its neighbor cells based on the interpolation. The computer is further programmed to calculate weighting factors wxand wybased on the local gradients, calculate a corrected final value I(0,0) for the identified cell, and correct the identified cell with the corrected final value.

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