Patent · US Active

Minimizing dot graininess in dot-on-dot printing devices

US8179568B2 · kind B2 · utility

1Cited by
13References
15Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJul 24, 2008
Grant dateMay 15, 2012
Priority date—
Expiry dateDec 18, 2030

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04N1/54
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

What is disclosed is a novel system and method for minimizing dot visibility in color marking devices capable of dot-on-dot printing. The present method achieves minimum dot visibility for a given dispersed-dot screen by performing a CMYK to CMYKRGB conversion which uses less visible dots as much as possible before more visible dots are introduced. The output color dot coverages are calculated sequentially to minimize the coverage of more visible dots in a decreasing order of brightness. Resulting images have noticeably reduced halftone graininess, particularly in the mid to darker tone areas. The present method is also computationally efficient.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.