Hybrid halftone generation mechanism using change in pixel error

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United States of America Patent

PATENT NO 8773722
SERIAL NO

13440830

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Abstract

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A method is disclosed. The method includes generating a Continuous Tone Image (CTI) with all pixel values same as a first gray level, generating an initial Half Tone Image (HTI) with all pixel values equal to minimum absorptance level and computing a change in pixel error for a first pixel. The change in pixel error is computed by identifying a first pixel indicated in a valid pixel map, toggling the first pixel with all the possible output states and swapping the first pixel with all neighbor pixels only if the stacking constraint is satisfied, updating the HTI with the maximum error decrease operation and continue to next pixel location till the end criteria is met.

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Patent Owner(s)

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RICOH COMPANY LTDTOKYO 143-8555

International Classification(s)

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  • 2012 Application Filing Year
  • G09G Class
  • 4192 Applications Filed
  • 3286 Patents Issued To-Date
  • 78.39 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20122013201420152016201720182019202020210255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chandu, Kartheek Longmont, US 41 287
Stanich, Mikel J Longmont, US 34 340
Trager, Barry M Yorktown Heights, US 31 970
Wu, Chai Wah Hopewell Junction, US 71 1183

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  • 1 Citation Count
  • G09G Class
  • 6.31 % this patent is cited more than
  • 11 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1068143491567749372114884201 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7071 - 8081 - 9091 - 100100 +050100150200250300350400450500550600650700750800850900

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