发明名称 |
Halftoning implementation for interactive image editing |
摘要 |
A circuit for producing a "knight ordered dither" halftone pattern for a CRT and a "double spiral" halftone pattern for a xerographic printer is described. The circuit comprises a RAM for storing the threshold values, a comparator, and supporting addressing and logic parts. Also described are a program for allowing the operator to interactively generate threshold patterns, and several knight tour patterns specifically designed for a CRT using interlaced rasters.
|
申请公布号 |
US4706077(A) |
申请公布日期 |
1987.11.10 |
申请号 |
US19810300349 |
申请日期 |
1981.09.08 |
申请人 |
XEROX CORPORATION |
发明人 |
ROBERTS, ALLEN M.;SANGSTER, ANDREW;STROLL, ZOLTAN |
分类号 |
G06F3/12;G06F3/153;G06T5/00;G09G1/06;G09G5/00;G09G5/10;G09G5/36;H04N1/405;(IPC1-7):G09G1/00;G09G3/00 |
主分类号 |
G06F3/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|