| 摘要 |
<p>A system for producing an image by halftone printing comprises generating halftone dots (12) from electronic data by scanning across a raster of write-spots (20) in a recording medium, spot-by-spot and line-by-line. Each dot (12) is defined within a repetitive dot template (22) containing a plurality of write-spots (20). The system writes at selective write-spots (20) by sending a present write-spot address signal obtained from a write-spot address register (76) to a spot-status Look-Up-Table (86) for selecting a predetermined value for each write-spot (20), the predetermined value determining an on-off status for the present write-spot (20). The spot-status Look-Up-Table (86) has a plurality of predetermined values corresponding, respectively, to addresses of write-spots (20) within the dot template (22). In the present invention, the selective writing step is performed by sending the write-spot address signal also to a pointer Look-Up-Table (80) for generating an address pointer signal uniquely associated with a particular write-spot address code, and transmitting the address pointer signal to the write-spot address register (76) in order to obtain the next write-spot address signal. <IMAGE></p> |
