公开(公告)号：US5691822A

公开(公告)日：1997-11-25

申请号：US371080

申请日：1995-01-10

申请人： Peter R. Jones

发明人： Peter R. Jones

IPC分类号： H04N1/405 ,  H04N1/40 ,  H04N1/46

CPC分类号： H04N1/4058

摘要： In halftone imaging using rotated halftone dot cells, the determination of correspondences between microdots and threshold matrix cells is simplified by leaving the threshold matrices which overlie each halftone dot cell unrotated. Threshold decisions for each microdot in a given horizontal row of a grid proceed in sequence. Each increment along a microdot row within a halftone cell is a unit increment along a horizontal axis of the threshold matrix. Hence, within each halftone cell, two integer additions are sufficient to derive an address of the threshold matrix cell associated with a microdot given the address of the threshold matrix cell associated with the previous microdot.

摘要翻译： 在使用旋转的半色调点单元的半色调成像中，通过离开覆盖每个半色调点单元未旋转的阈值矩阵来简化确定微点与阈值矩阵单元之间的对应关系。 依次对网格的给定水平行中的每个微点进行阈值判定。 沿着半色调单元内的微点行的每个增量是沿阈值矩阵的水平轴的单位增量。 因此，在每个半色调单元内，两个整数加法足以导出与给定与先前微点相关联的阈值矩阵单元的地址的微点相关联的阈值矩阵单元的地址。