Patent ID: 7375738

Claim:
A method of electronically adjusting an image to compensate for laser beam process direction position errors in an electrophotographic apparatus comprising: reading image data from a first memory location, said image data comprising pixels arranged in a plurality of columns and a plurality of rows; performing pixel shifts on select columns of said image data based upon a bow profile that characterizes process direction position errors of Pels written by a laser beam as it traverses generally in a scan direction to define adjusted image data, wherein said bow profile comprises an instruction for each column of said image data indicating whether that column should be shifted up, down, or not shifted with respect to an adjacent column position; storing said adjusted image data to a second memory location; and deriving a laser signal from said adjusted image data in said second memory location such that said laser signal corresponds to said pixel shifted version of said image data that is pre-warped in said process direction in a manner corresponding to said bow profile.