| 摘要 |
PROBLEM TO BE SOLVED: To provide a method to improve a halftone by combining halftoning with algorithmic processing. SOLUTION: A system for halftone screening includes means adapted to receive image data having a number of tonal levels representating a continuous tone image. The system further includes a memory including a LUT having a number of alternative halftone cell arrangements for each tonal level. Each cell of the LUT consists of a number of device dots describing a particular gray value. For each gray value, there are several alternative cells with different arrangements of the same number of device dots. The LUT is configured with the cells of different arrangements in rows. The rows increase in the number of device dots; hence, each column describes halftone cells of increasing tonal values. The system then transmits the image data having a tonal level to the LUT, and randomly selects a halftone cell arrangement to generate a halftone output. COPYRIGHT: (C)2006,JPO&NCIPI
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