Fast gamma correction method for image reading apparatus

Image analysis – Color image processing – Color correction

Reexamination Certificate

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C382S274000, C345S606000, C348S254000, C348S674000, C358S519000

Reexamination Certificate

active

06944336

ABSTRACT:
A fast gamma correction method for an image reading apparatus is proposed. The original intervals for normalized output data are combined to merged intervals fewer in number and the original color correction function is replaced by a fitting function in the merged intervals. For an input normalized data, the corresponding merged interval is found and a fitting function associated with the merged interval is invoked to find the corresponding normalized and corrected data.

REFERENCES:
patent: 5680476 (1997-10-01), Schmidt et al.
patent: 5818521 (1998-10-01), Hieda
patent: 6130763 (2000-10-01), Ohta et al.

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