Patent ID: 6667756
Filing Date: 2003-12-23
Classification: H04N

Abstract:
A method of reducing show-through error in duplex printing, comprising:determining at least one of sizes and locations of a first side image and a second side image of a duplex-printed image recording medium; determining an amount of residual magnification error based on the determined at least one of sizes and locations, comprising: determining a magnification error for the first side based on the determined at least one of sizes and locations, determining a first pass shrink rate based on the determined at least one of sizes and locations, assigning a net shrink rate for the image recording medium, determining at least an initial pixel clock frequency error and a photoreceptor speed error based on the determined magnification error for the first side, the assigned net shrink rate and the determined first pass shrink rate, and determining the amount of residual magnification error based on the determined initial pixel clock frequency error and the photoreceptor speed error; and determining margin shifts that reduce show-through error due to at least the residual magnification error based on the determined amount of residual magnification error; wherein the determined margin shifts can be subsequently applied during printing of image data to reduce show-through error.