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Patent Searching and Data


Title:
BLACK OPTIONAL ENHANCEMENT METHOD
Document Type and Number:
Japanese Patent JP2004145339
Kind Code:
A
Abstract:

To provide a halftone base printing method in which mis-superposition is inconspicuous in superposition of color and black and enhanced black is selectively printed.

Pixel positions required to be marked in only black are identified, and black is used for the pixel positions identified. Among the pixel positions identified, non-black color is used for only positions that correspond to reference pattern on-pixels of non-black color pixels which has: (A) a black halftone threshold level associated with one that is darker than a predetermined non-white threshold level; and (B) at least 20% of on-pixel parent population and toner transfer efficiency that is less than at least about 20%.


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Inventors:
Kroon, Stephen M.
Application Number:
JP2003000358125
Publication Date:
May 20, 2004
Filing Date:
October 17, 2003
Export Citation:
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Assignee:
XEROX CORP
International Classes:
B41J2/525; G03G13/01; G03G15/01; G06T5/00; H04N1/29; H04N1/405; H04N1/52; (IPC1-7): G03G15/01; B41J2/525; G06T5/00; H04N1/29; H04N1/405; H04N1/52
Attorney, Agent or Firm:
熊倉 禎男
大塚 文昭
今城 俊夫
西島 孝喜