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Title: US4319268: Reproduction picture sharpness emphasizing method
[ Derwent Title ]


Country: US United States of America

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12 pages

 
Inventor: Yamada, Mitsuhiko; Kyoto, Japan

Assignee: Dainippon Screen Seizo Kabushiki Kaisha, Kyoto, Japan
other patents from DAINIPPON SCREEN MFG. CO., LTD. (133435) (approx. 1,048)
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Published / Filed: 1982-03-09 / 1980-06-30

Application Number: US1980000164556

IPC Code: Advanced: G03F 1/00; G06T 5/00; G06T 5/20; H04N 1/00; H04N 1/409; H04N 1/58;
IPC-7: H04N 1/46;

ECLA Code: G06T5/00D3U; G06T5/20; H04N1/409B; H04N1/58;

U.S. Class: Current: 358/532; 348/625;
Original: 358/075; 358/021.R; 358/080;

Field of Search: 358/021,75,79,80

Priority Number:
1979-07-02  JP1979000082571

Abstract:     A sharpness emphasizing method of a reproduction picture for use in a picture reproducing machine such as a color scanner or a color facsimile, wherein an original picture is scanned to pick up a picture signal which is separated into color separation picture element signals of primary colors, and wherein a reproduction picture is reproduced by using the color separation picture element signal, in which a main picture element signal whose sharpness is to be emphasized, and supplemental picture element signals positioned around the main picture element signal are picked up, in which the supplemental picture element signals picked up are weighted with factors in such a manner that the supplemental picture element signals positioned in the same distance away from the main picture element signal may be weighted with the same factor, and the supplemental picture element signals weighted are averaged to obtain a mean value signal, and in which the main picture element signal is emphasized according to the mean value signal.

Attorney, Agent or Firm: Painter, Michael A. ;

Primary / Asst. Examiners: Murray, Richard;

INPADOC Legal Status: None          Buy Now: Family Legal Status Report

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First Claim:
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What is claimed is:     1. A sharpness emphasizing method of picture reproduction for use in a picture reproducing machine wherein an original picture is scanned to pick up a picture signal which is separated into color separation picture element signals of primary colors, and wherein a reproduction picture is produced by using the color separation picture element signal, comprising the steps of:
  • (a) picking up a main picture element signal whose sharpness is to be emphasized, and supplemental picture element signals positioned around the main picture element signal;
  • (b) weighting the supplemental picture element signals with factors in such a manner that the supplemental picture element signals positioned in the same distance away from the main picture element signal may be weighted with the same factor;
  • (c) averaging the supplemental picture element signals weighted to obtain a mean value signal; and
  • (d) emphasizing the main picture element signal according to the mean value signal.


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Forward References: Show 27 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (27)   |   Backward references (6)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 5pp US2962548* 1960-11 Taudt    
Get PDF - 13pp US3153698* 1964-10 Hall et al.    
Get PDF - 14pp US3194882* 1965-07 Hall    
Get PDF - 10pp US3194883* 1965-07 Ross    
Get PDF - 10pp US3194884* 1965-07 Ross et al.    
Get PDF - 16pp US4058828  1977-11 Ladd  Eastman Kodak Company Document copying apparatus
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Foreign References: None

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