Patent ID: 8379247
Filing Date: 2013-02-19
Classification: H04N,Y10T

Abstract:
1. A scanner-and-processor based method for carrying out image-to-paper registration setup in a printer, comprising: using a printer undergoing image-to-sheet registration setup, printing a test pattern on a sheet having a plurality of reference targets within a printable region of the sheet; using a grayscale scanner, scanning the test pattern-bearing sheet to generate an image bitmap of the test pattern-bearing sheet such that the bitmap image exceeds or includes the edges of the sheet so that the image bitmap contains the edges of the sheet within it; using the grayscale scanner, measuring a plurality of distances in units of pixels between the reference targets and/or edges of the sheet using a plurality of swaths of the image bitmap itself as the measurement tool to produce a set of measured distances in units of pixels, the measuring taking the form of producing a waveform of current corresponding to an amount of light reflected by features in each of the swaths; using a processor, calculating positional errors of the image bitmap on the sheet based on the set of measured distances after conversion from pixels to a device independent unit of length; using the processor and based on the calculated positional errors, determining a plurality of actuator adjustment values to use to correct the image-to-paper registration setup of the printer; and using the processor, transferring the actuator adjustment values to the printer to adjust actuators of the printer and thereby correct the image-to-paper registration setup of the printer.