Patent ID: 7095531
Filing Date: 2006-08-22
Classification: B41J,H04N

Abstract:
1. A method for compensating for streak defects in an image formed using an image forming device that forms the image on a receiving material that is translated through the image forming device along a process direction, comprising: printing a compensation pattern usable to determine a difference in gray level between an actual gray level value and an intended gray level value at a cross-process-direction image-forming device pixel location in the image, comprising: scanning the compensation pattern to generate a set of scanned image data, the scanned image data defining an image value for each of a plurality of scanned image cross-process-direction pixel locations for at least one of the gray level portions and for at least one row of fiducial marks; analyzing the scanned image data for at least one of the gray level portions to determine at least one actual gray level value for at least one of the plurality of gray level portions for at least one cross-process-direction image-forming device pixel location based on a location of at least one fiducial mark of the at least one row of fiducial marks in the scanned image data; generating, for each analyzed cross-process-direction image-forming device pixel location, for each analyzed gray level portion of that analyzed cross-process-direction image-forming device pixel location, at least one compensation parameter based on the determined actual gray level value for that analyzed gray level portion and the intended gray level value for that analyzed gray level portion.