Title:
網点による階調再現方法、網目版出力装置、および網目版
Document Type and Number:
Japanese Patent JP4324278
Kind Code:
B2
Abstract:
Tone jumps are eliminated in all areas ranging from a highlight area through an intermediate tone area to a shadow area for thereby achieving a smoother tone reproduction. Halftone dots (50a (50b)) are grown in a circular shape from a halftone percentage of 0 % to a first highlight percentage (HL1). Halftone dots (50b (50c)) are grown while changing from the circular shape to a square shape from the first highlight percentage (HL1) to a second highlight percentage (HL2) greater than the first highlight percentage (HL1). Halftone dots (50c (50d, 50e)) are grown in a square shape from the second highlight percentage (HL2) to a second shadow percentage (SD2). Halftone dots (50e (50f)) are grown while changing from the square shape to a circular shape from the second shadow percentage (SD2) to a first shadow percentage (SD1) greater than the second shadow percentage (SD2). Halftone dots (50f) are grown in a circular shape from the first shadow percentage (SD1) to a percentage of 100 %. The dots stick well to the print sheet in the highlight area and clearly define inter-dot spaces in the shadow area, and no tone jumps occur in the vicinity of the halftone percentages of 50 % and 78.5 %.
Inventors:
Yoshiaki Inoue
Application Number:
JP14192199A
Publication Date:
September 02, 2009
Filing Date:
May 21, 1999
Export Citation:
Assignee:
FUJIFILM Corporation
International Classes:
B41J2/52; B41C1/00; G03F5/00; H04N1/405
Domestic Patent References:
| JP8256265A | ||||
| JP7333822A | ||||
| JP7095404A | ||||
| JP4227162A | ||||
| JP57032385B1 |
Attorney, Agent or Firm:
Takehiro Chiba
Toshiyuki Miyadera
Naoki Kashima
Yasuo Takubo
Toshiyuki Miyadera
Naoki Kashima
Yasuo Takubo