Scanner Y-positioning accuracy.

摘要

An image scanning system for producing digital data of a predetermined resolution representing a scanned image of an original (102). The system includes a photosensing array (116) for generating the digital data, a stepper motor ( 112) having steps of predetermined size for positioning the array with respect to the original, an image buffer (454) for storing the data and control system (440,452) for synchronizing the scanning and the storing of data at one or more Y-positioning speeds. Scan line extents along the Y-direction are defined by the relationship of the Y-positioning speed to the array exposure time. The scan lines in conjunction with the present invention have boundaries, wherein the boundaries can occur on or between said motor steps. <IMAGE>