| 摘要 |
A hyperacuity printing system for rendering image data on a recording medium, the image data being rendered as an array of pixels across the recording medium in a fastscan direction, and an orthogonal slowscan direction. The system includes a data source (51) for supplying grayscale input image data and a scanning device (15-26) for rendering grayscale output image data, the scanning device (15-26) having a writing device (15) for writing scan spots on the recording medium at a writing pitch in the slowscan direction and a writing pitch in the fastscan direction. The system also includes transformation circuitry (50) for transforming the grayscale input image data into grayscale output image data, the transformation circuitry including a halftoner (70), a thresholder (68), and a selection device (62,300), where the selection device selects either the thresholder (68) or the halftoner (70) to provide the grayscale output image data. The selection device includes a macro selection function (62) and a micro selection function (300), the micro selection (62) function being able to select the thresholder (68) or the halftoner (70) with a precision finer than the writing pitch in either the slowscan or the fastscan direction. Finally, provided is a modulating device (28; Fig.2) coupled between the transformation circuitry (50) and the scanning device (15-26) for intensity modulating each of the scan spots in accordance with the grayscale output image data. <IMAGE> |
