FM screening with sub-dot phase modulation

申请公布号：

US2004090654(A1)

申请号：

US20030662460

申请日期：

2003.09.15

申请公布日期：

2004.05.13

申请人：

MINNEBO LUC;VELDE KOEN VANDE;DELABASTITA PAUL

发明人：

MINNEBO LUC;VELDE KOEN VANDE;DELABASTITA PAUL

分类号：

H04N1/405;H04N1/52;(IPC1-7):H04N1/405

主分类号：

H04N1/405

摘要：

In an error diffusion halftoning process a clusters of adjacent pixels can be placed at any arbitrary position of the pixel grid. The quantization step of the error diffusion takes into account the effect of placement of a cluster of pixels. The size of a pixel cluster may be fixed or variable. The quantization step of the halftoning process may take into account the effect of the placement of a cluster of pixels in the same or in a different color separation. The method produces halftones that are less grainy and that print more robustly and uniformly in the presence of printer variability. The quantization step in the error diffusion process according to one representative embodiment of the invention evaluates quantization values of possible alternatives in placing the clusters of pixels.