1. A method of printing a high quality image using a printer that includes a printhead of a low resolution, said method comprising the steps of: inputting a high resolution binary data image file of said image represented in binary data form that is of higher resolution in one scan direction than said low resolution; sequentially operating on blocks of data from said binary data file to define multibit grey level pixel data of said low resolution for recording by said printer; and printing said pixel data to form the image by operating the printhead to record grey level pixels on a recording medium at said low resolution.