Title:
【発明の名称】ハーフトーン画像を表示する方法
Document Type and Number:
Japanese Patent JP3484438
Kind Code:
B2
Abstract:
An improved method is described for producing halftone images with halftone cell dimensions and orientation to match a desired screen grid by choosing reference halftone gray values for each pixel in a supertile of representative halftone cells, testing source pixel gray values against corresponding reference gray values and selectively displaying corresponding pixels, where the supertile includes more than one halftone cell, is composed of whole pixels, can tile the source image plane when placed side-by-side with copies of itself, and includes halftone cells on adjacent supertiles that, in tiling the plane, align exactly or closely to approximate a smooth halftone screen. The invention also includes ways of manipulating the supertile for faster output of a halftone image.
Inventors:
Stephen N Syrah
Application Number:
JP30126090A
Publication Date:
January 06, 2004
Filing Date:
November 08, 1990
Export Citation:
Assignee:
Adobe Systems Incorporated
International Classes:
G03G15/01; G03G13/26; H04N1/405; (IPC1-7): H04N1/405; G03G13/00; G03G15/01
Domestic Patent References:
| JP60165873A | ||||
| JP62286382A | ||||
| JP1183274A | ||||
| JP1075375A | ||||
| JP5249361B2 |
Attorney, Agent or Firm:
Masaki Yamakawa (2 outside)