Patent ID: 8805115

Claim:
A method for correcting an artifact in a measurement caused by a pixel in a focal plane array randomly changing offset level, the method comprising: in an image processor: given a residual cube derived from a data cube of measurements generated by a focal plane array, in which each sample of the residual cube is a residual error value in approximating the data cube as a linear combination of basis vectors; determining a suspicious pixel suspected of causing an artifact in a measurement as a function of a statistical analysis of a collection of samples representing residual error values associated with a subject focal plane pixel measuring one waveband at different times; based on the determination of the suspicious pixel, identifying a pattern of residual error values indicative of the artifact caused by the suspicious pixel; determining a correcting time-dependent offset substantially reciprocal to the identified pattern of residual error values; and applying the correcting time-dependent offset to the measurement to correct for the artifact in the measurement.