Patent ID: 7400430

Claim:
A method for detecting and compensating for color misregistration comprising the steps of: scanning a target having a black/white edge or a solid color edge; generating a curve of gray values versus pixel spatial position for each color channel scanned on said black/white edge or on said solid color edge of a target; calculating a misregistration error by calculating an offset between color channels; calibrating a unit such as a scanner using said calculated misregistration error, wherein said misregistration error is calculated for said black/white edge scanned on said target, and wherein said misregistration error between a first color channel and a second color channel is equal to the equation: error=diff1/diff2; wherein diff1 is equal to the difference in gray values at a particular pixel position between said first color channel and said second color channel; and wherein diff2 is equal to the difference in gray values between neighboring pixel positions in said first color channel.