DE68929094D1 - Stückweise Druckbildverbesserung für Punktmatrixdrucker - Google Patents

Stückweise Druckbildverbesserung für Punktmatrixdrucker

Info

Publication number
DE68929094D1
DE68929094D1 DE68929094T DE68929094T DE68929094D1 DE 68929094 D1 DE68929094 D1 DE 68929094D1 DE 68929094 T DE68929094 T DE 68929094T DE 68929094 T DE68929094 T DE 68929094T DE 68929094 D1 DE68929094 D1 DE 68929094D1
Authority
DE
Germany
Prior art keywords
piecewise
print image
dot matrix
image improvement
matrix printers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE68929094T
Other languages
English (en)
Other versions
DE68929094T2 (de
Inventor
Charles Cheng-Yuan Tung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26926349&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE68929094(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US07/232,814 external-priority patent/US4847641A/en
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of DE68929094D1 publication Critical patent/DE68929094D1/de
Application granted granted Critical
Publication of DE68929094T2 publication Critical patent/DE68929094T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/128—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers generating or processing printable items, e.g. characters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K2215/00—Arrangements for producing a permanent visual presentation of the output data
    • G06K2215/0002—Handling the output data
    • G06K2215/002—Generic data access
    • G06K2215/0022—Generic data access characterised by the storage means used
    • G06K2215/0025—Removable memories, e.g. cartridges
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K2215/00—Arrangements for producing a permanent visual presentation of the output data
    • G06K2215/0002—Handling the output data
    • G06K2215/004—Generic data transformation
    • G06K2215/006—Anti-aliasing raster data
DE68929094T 1988-08-16 1989-08-02 Stückweise Druckbildverbesserung für Punktmatrixdrucker Expired - Fee Related DE68929094T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/232,814 US4847641A (en) 1988-08-16 1988-08-16 Piece-wise print image enhancement for dot matrix printers
US07/374,494 US5005139A (en) 1988-08-16 1989-06-30 Piece-wise print image enhancement for dot matrix printers

Publications (2)

Publication Number Publication Date
DE68929094D1 true DE68929094D1 (de) 1999-12-02
DE68929094T2 DE68929094T2 (de) 2000-02-10

Family

ID=26926349

Family Applications (2)

Application Number Title Priority Date Filing Date
DE68929094T Expired - Fee Related DE68929094T2 (de) 1988-08-16 1989-08-02 Stückweise Druckbildverbesserung für Punktmatrixdrucker
DE68927335T Expired - Fee Related DE68927335T2 (de) 1988-08-16 1989-08-02 Stückweise Druckbildvergrösserung für Punktmatrixdrucker

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE68927335T Expired - Fee Related DE68927335T2 (de) 1988-08-16 1989-08-02 Stückweise Druckbildvergrösserung für Punktmatrixdrucker

Country Status (3)

Country Link
US (1) US5005139A (de)
EP (2) EP0710565B1 (de)
DE (2) DE68929094T2 (de)

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US5680485A (en) * 1994-12-19 1997-10-21 Xerox Corporation Method and apparatus employing erosion-based filter pairs for image mapping
JPH08238797A (ja) * 1995-03-03 1996-09-17 Fujitsu Ltd 画像形成装置
US5703695A (en) * 1995-03-20 1997-12-30 Nguyen; Hugh P. Multi-dot dither matrix generation
US5526468A (en) * 1995-03-27 1996-06-11 Lexmark International, Inc. Method and apparatus for smoothing an expanded bitmap for two-state image data
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US5687297A (en) * 1995-06-29 1997-11-11 Xerox Corporation Multifunctional apparatus for appearance tuning and resolution reconstruction of digital images
US5920336A (en) * 1995-09-12 1999-07-06 Hewlett-Packard Company Beam deflecting for resolution enhancement and banding reduction in a laser printer
US5742703A (en) * 1995-10-11 1998-04-21 Xerox Corporation Method and apparatus for the resolution enhancement of gray-scale images that include text and line art
US5657430A (en) 1996-03-07 1997-08-12 Hewlett-Packard Company Software-based procedure for conversion of a scalable font character bitmap to a gray level bitmap
US5754751A (en) * 1996-03-07 1998-05-19 Hewlett-Packard Company Software-based procedure and apparatus for enhancement of a gray level image
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Also Published As

Publication number Publication date
EP0710565A3 (de) 1996-05-15
EP0356038B1 (de) 1996-10-16
EP0710565B1 (de) 1999-10-27
EP0710565A2 (de) 1996-05-08
EP0356038A2 (de) 1990-02-28
DE68929094T2 (de) 2000-02-10
US5005139A (en) 1991-04-02
EP0356038A3 (de) 1990-12-05
DE68927335D1 (de) 1996-11-21
DE68927335T2 (de) 1997-03-06

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8327 Change in the person/name/address of the patent owner

Owner name: HEWLETT-PACKARD CO. (N.D.GES.D.STAATES DELAWARE),

8365 Fully valid after opposition proceedings
8327 Change in the person/name/address of the patent owner

Owner name: HEWLETT-PACKARD DEVELOPMENT CO., L.P., HOUSTON, TE

8339 Ceased/non-payment of the annual fee