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Title: US5307181: Screen generation for halftone screening of images using scan line segments of oversized screen scan lines
[ Derwent Title ]


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US United States of America
A PATENT [FROM BEGIN UNTIL END 2000] or PATENT ISSUED AFTER 1ST PUB. WITHIN THE TVPP i

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15 pages

 
Inventor: LEVIEN RAPHAEL L; United States of America

Assignee: LEVIEN RAPHAEL L United States of America
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Published / Filed: 1994-04-26 / 1991-09-27

Application Number: US1991000768135

IPC Code: Advanced: G03F 1/00; G03F 5/00; H04N 1/23; H04N 1/405; H04N 1/46;

ECLA Code: H04N1/405C6;

U.S. Class: 358/456; 358/458; 358/465; 358/466; 358/534; 358/536;

Priority Number:
1991-09-27  US1991000768135
1991-09-03  US1991000753893

Abstract:     A halftone screen pattern generation system for computing halftone screened images with rotated screens including multiple angle and ruling combinations, including irrational tangent angles, is disclosed. A screen pattern is generated by storing an oversized strip from an ideal angled screen pattern, and then assembling a sequence comprising selected scan line segments of the oversized strip. Each selected scan line segment corresponds to one of a plurality of offsets of the oversized strip. The error between the actual generated screen and ideal desired screen is computed. Each subsequent scan line segment is selected from the plurality of scan line segments corresponding to the plurality of offsets so as to minimize the accumulated error. In accordance with one aspect of the present invention, the measure of error between the actual generated screen and the ideal angled screen is the length of a vector in a transformed UV space between the actual screen sample point and the ideal screen sample point. The error is determined by vector addition of the accumulated error, from scan line to scan line, which is added to the present error contribution from the offset of the present scan line.

Maintenance Status: E2 Expired  Check current status

INPADOC Legal Status:
Gazette date Code   Description (remarks)     List all possible codes for US
2002-06-25 FP - Expired due to failure to pay maintenance fee   ( 2002-04-26 )
2002-04-26 LAPS - Lapse for failure to pay maintenance fees  
2001-11-20 REMI Maintenance fee reminder mailed  
1997-09-22 FPAY + Fee payment  

  
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Parent Case:     This is continuation in part application of U.S. patent application entitled, "SCREEN GENERATION FOR HALFTONE SCREENING OF IMAGES", Ser. No. 753,893, filed Sep. 3, 1991.

Designated Country: DE DK FR GB 

       
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PDF
PublicationPub. DateFiled   Assignee   Title
Buy PDF - 19pp US5442461 1995-08-15  1992-07-13    Screen generation for halftone screening of images with reduction of irrational correction artifacts
Buy PDF - 16pp US5315406 1994-05-24  1991-12-10    Screen generation for halftone screening of images using arbitrary distribution of transformed screen coordinates
Buy PDF - 15pp US5307181 1994-04-26  1991-09-27    Screen generation for halftone screening of images using scan line segments of oversized screen scan lines
Buy PDF - 19pp US5291310 1994-03-01  1991-09-03    Screen generation for halftone screening of images
Buy PDF - 17pp US5276535 1994-01-04  1991-12-24    Method and apparatus for halftoning of images using grayscale error diffusion
Buy PDF - 1pp JP05284359A2 1993-10-29  1992-09-03  LEVIEN RAPHAEL L DOT GENERATION FOR HALF TONE DOTTING OF IMAGE
Buy PDF - 1pp JP05276366A2 1993-10-22  1992-12-24  LEVIEN RAPHAEL L METHOD AND DEVICE FOR SCREENING HALFTONE OF IMAGE BY GRAY SCALE ERROR DIFFUSION
Buy PDF - 1pp JP05276364A2 1993-10-22  1992-09-28  LEVIEN RAPHAEL L DOT GENERATION FOR DOTTING HALFTONE OF IMAGE USING SCANNING LINE SEGMENT OF OVERSIZE DOT SCANNING LINE
Buy PDF - 29pp EP0549326B1 1999-02-24  1992-12-22  Levien, Raphael L. Method and apparatus for halftoning of images
Buy PDF - 22pp EP0549326A1 1993-06-30  1992-12-22  Levien, Raphael L. Method and apparatus for halftoning of images
Buy PDF - 23pp EP0540169B1 1997-05-21  1992-09-25  Levien, Raphael L. Screen generation for halftone screening of images
Buy PDF - 19pp EP0540169A1 1993-05-05  1992-09-25  Levien, Raphael L. Screen generation for halftone screening of images
Buy PDF - 24pp EP0531129B1 1998-04-08  1992-09-03  Levien, Raphael L. Screen generation for halftone screening of images
Buy PDF - 2pp EP0531129A3 1993-03-31  1992-09-03  Levien, Raphael L. Screen generation for halftone screening of images
Buy PDF - 22pp EP0531129A2 1993-03-10  1992-09-03  Levien, Raphael L. Screen generation for halftone screening of images
Buy PDF - 46pp DE69228469T2 1999-09-09  1992-12-22  LEVIEN VERFAHREN UND VORRICHTUNG ZUR HALBTONRASTERUNG VON BILDERN
  DE69228469C0 1999-04-01  1992-12-22  LEVIEN, RAPHAEL L., MCDOWELL, VA., US VERFAHREN UND VORRICHTUNG ZUR HALBTONRASTERUNG VON BILDERN
Buy PDF - 42pp DE69225036T2 1998-08-13  1992-09-03  LEVIEN, RAPHAEL L., MCDOWELL, VA., US RASTERERZEUGUNG ZUR HALBTONRASTERUNG VON BILDERN
  DE69225036C0 1998-05-14  1992-09-03  LEVIEN, RAPHAEL L., MCDOWELL, VA., US RASTERERZEUGUNG ZUR HALBTONRASTERUNG VON BILDERN
Buy PDF - 38pp DE69219853T2 1997-10-09  1992-09-25  LEVIEN RAPHAEL L Rastererzeugung zur Halbtonrasterung von Bildern
  DE69219853C0 1997-06-26  1992-09-25  LEVIEN RAPHAEL L Rastererzeugung zur Halbtonrasterung von Bildern
Buy PDF CA2078748C 1997-10-21  1992-09-21  LEVIEN RAPHAEL L SCREEN GENERATION FOR HALFTONE SCREENING OF IMAGES USING SCAN LINE SEGMENTS OF OVERSIZED SCAN LINES
Buy PDF CA2078748A1 1993-03-28  1992-09-21  LEVIEN RAPHAEL L SCREEN GENERATION FOR HALFTONE SCREENING OF IMAGES USING SCAN LINE SEGMENTS OF OVERSIZED SCAN LINES
Buy PDF CA2077320C 1997-08-12  1992-09-01  LEVIEN, RAPHAEL L. SCREEN GENERATION FOR HALFTONE SCREENING OF IMAGES
Buy PDF CA2077320A1 1993-03-04  1992-09-01  LEVIEN, RAPHAEL L. SCREEN GENERATION FOR HALFTONE SCREENING OF IMAGES
  25 family members shown above     - Based on data when this patent issued.


Forward References: Show 10 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (10)   |   Backward references (0)   |   Citation Link

       
Other Abstract Info: DERABS G93-078625 DERABS G93-145528

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