A method for printing grayscale images. A sliding window memory stores an array of exposure data. The memory is initialized (80) with zero values. The memory is then addressed (82) so that the last row of the array is filled with exposure data. A microimage is then generated based on the exposure...http://www.google.es/patents/US5699168?utm_source=gb-gplus-sharePatente US5699168 - Grayscale printing with sliding window memory