Title:
SCREENING DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2008/018491
Kind Code:
A1
Abstract:
In a CTP or CTF printmaking by means of an ink jet system, a tone gap (discontinuity) or
a non-linearity is improved, so that high tone reproducibility can be realized. A
screening device inputs density information of an original picture, uses a halftone
dot pattern corresponding to the input density, and generates halftone data
to express a tone corresponding to light and shade of the original picture. The
screening device is provided with a means for optimizing the halftone dot pattern
comprised of a combination of halftone dots. The halftone dot pattern is comprised
of a combination of one or a plurality of the same or different kinds of halftone
dots out of a plurality of kinds of halftone dots with the different number of dots
while the optimizing means optimizes combinations of dots so that a relationship
between a character printing area of an output machine formed by the halftone
dot pattern and the input density may become a desired function.
Inventors:
BIZEN YOSHIO (JP)
UCHIYAMA YUJI (JP)
UCHIYAMA YUJI (JP)
Application Number:
PCT/JP2007/065499
Publication Date:
February 14, 2008
Filing Date:
August 08, 2007
Export Citation:
Assignee:
KIMOTO KK (JP)
BIZEN YOSHIO (JP)
UCHIYAMA YUJI (JP)
BIZEN YOSHIO (JP)
UCHIYAMA YUJI (JP)
International Classes:
H04N1/405; B41C1/00; G06T5/00
Foreign References:
| JP2000341521A | 2000-12-08 | |||
| JPS59132280A | 1984-07-30 | |||
| JPS63144657A | 1988-06-16 | |||
| JPH0530343A | 1993-02-05 | |||
| JPH07254984A | 1995-10-03 | |||
| JP2003143405A | 2003-05-16 | |||
| JP2006094566A | 2006-04-06 | |||
| JP2003158633A | 2003-05-30 |
Attorney, Agent or Firm:
TADA, Kimiko et al. (6-15 Kasumigaseki 3-chom, Chiyoda-ku Tokyo 13, JP)
Download PDF:
Previous Patent: METHOD FOR FORMING CONDUCTIVE FILM, THIN FILM TRANSISTOR, PANEL WITH THIN FILM TRANSISTOR, AND METHO...
Next Patent: VEHICLE SEAT
Next Patent: VEHICLE SEAT