1. A digital printing method for printing an image, using a printing system capable of printing a plurality of density levels, said method comprising: printing at least one left control strip in a left zone of a print medium and at least one right control strip in a right zone of said print medium, said left control strip comprising at least one left patch and said right control strip comprising at least one right patch, wherein settings are used which are intended for printing the same color and/or density level for a left patch of said at least one left patch and for a corresponding right patch of said at least one right patch; measuring a density level and/or color of at least said printed left patch and right patch; adjusting said printing system based on a difference between the measured density levels and/or colors of said left patch and said right patch in order to perform a left-right correction in said image to be printed; and printing the image using said adjusted printing system.