Patent ID: 8159555

Claim:
A method for correcting defects in one or more frames of motion picture film, the method comprising the steps of: (a) generating an image that includes an infrared channel and one or more color channels; (b) providing an infrared unbuilding model that includes at least one linear term and at least one non-linear term that accounts for cross-talk between the one or more color channels and the infrared channel, wherein at least one of the non-linear terms includes a square of one of the color channels or the product of two of the color channels, the infrared unbuilding model having the form: I ideal =I measured +L R ×R+L R2 ×R 2 +L RG ×R×G+L RB ×R×B+L G ×G+L G2 ×G 2 +L GB ×G×B+L B ×B+L B2 ×B 2 where R, G and B are measured values for the red, green and blue color channels, respectively, I measured is a measured value for the infrared channel, L R , L G , and L B are model parameters for the linear terms, and L R2 , L G2 , L B2 , L RG , L RB and L GB are model parameters for the non-linear terms, wherein at least one of the model parameters for the linear terms is non-zero and at least one of the model parameters for the non-linear terms is non-zero; (c) providing one or more parameters for the infrared unbuilding model; and (d) applying the infrared unbuilding model parameters to the infrared unbuilding model to remove cross-talk between the one or more color channels and the infrared channel to generate an independent infrared channel that is free or substantially free of color channel content.