WO2000060479A8 - Methods and apparatus for generating and representing luminance intensity values - Google Patents

Methods and apparatus for generating and representing luminance intensity values

Info

Publication number
WO2000060479A8
WO2000060479A8 PCT/US2000/006873 US0006873W WO0060479A8 WO 2000060479 A8 WO2000060479 A8 WO 2000060479A8 US 0006873 W US0006873 W US 0006873W WO 0060479 A8 WO0060479 A8 WO 0060479A8
Authority
WO
WIPO (PCT)
Prior art keywords
operations
display
values
packed
generating
Prior art date
Application number
PCT/US2000/006873
Other languages
French (fr)
Other versions
WO2000060479A1 (en
Inventor
Martin T Shetter
Gregory C Hitchcock
Bodin Dresevic
Original Assignee
Microsoft Corp
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
Application filed by Microsoft Corp filed Critical Microsoft Corp
Priority to AU38876/00A priority Critical patent/AU3887600A/en
Publication of WO2000060479A1 publication Critical patent/WO2000060479A1/en
Publication of WO2000060479A8 publication Critical patent/WO2000060479A8/en

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/222—Control of the character-code memory
    • G09G5/227—Resolution modifying circuits, e.g. variable screen formats, resolution change between memory contents and display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0457—Improvement of perceived resolution by subpixel rendering

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The dashed box (833) represents an alternative method to the pixel value look-up table (831) approach, which may be used to implement the display driver (830). Block (833) represents gamma correction, color compensation and/or palette selection operations which can be performed using the packed pixel values as input to generate processed pixel values (packed pixels 807) in a format suitable for use by the display adapter (548) and/or display (547). In various palletized embodiments, the display adapter (548) converts the color palette values obtained via the display driver look-up table operations into actual R, G, B luminous intensity (packed pixel 807) values through the use of a color palette which is frequently implemented in hardware. Scaling operations (808), Hinting operations (810), and Scan conversion sub-routines (812) are inclusive of the rendering and rasterization routines (805).
PCT/US2000/006873 1999-03-19 2000-03-15 Methods and apparatus for generating and representing luminance intensity values WO2000060479A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38876/00A AU3887600A (en) 1999-03-19 2000-03-15 Methods and apparatus for generating and representing luminance intensity values

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27330299A 1999-03-19 1999-03-19
US09/273,302 1999-03-19

Publications (2)

Publication Number Publication Date
WO2000060479A1 WO2000060479A1 (en) 2000-10-12
WO2000060479A8 true WO2000060479A8 (en) 2001-03-22

Family

ID=23043375

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/006873 WO2000060479A1 (en) 1999-03-19 2000-03-15 Methods and apparatus for generating and representing luminance intensity values

Country Status (2)

Country Link
AU (1) AU3887600A (en)
WO (1) WO2000060479A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6342896B1 (en) * 1999-03-19 2002-01-29 Microsoft Corporation Methods and apparatus for efficiently implementing and modifying foreground and background color selections
EP1449190B1 (en) 2001-05-02 2013-07-10 Bitstream, Inc. Methods, systems, and programming for producing and displaying subpixel-optimized images and digital content including such images
US7219309B2 (en) 2001-05-02 2007-05-15 Bitstream Inc. Innovations for the display of web pages
SE526226C2 (en) * 2003-12-19 2005-08-02 Ericsson Telefon Ab L M Image Processing
US7593017B2 (en) 2006-08-15 2009-09-22 3M Innovative Properties Company Display simulator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5228120A (en) * 1989-10-12 1993-07-13 International Business Machines Corporation Display system with direct color mode
US5877754A (en) * 1993-06-16 1999-03-02 Intel Corporation Process, apparatus, and system for color conversion of image signals
US5483259A (en) * 1994-04-12 1996-01-09 Digital Light & Color Inc. Color calibration of display devices
US5867178A (en) * 1995-05-08 1999-02-02 Apple Computer, Inc. Computer system for displaying video and graphic data with reduced memory bandwidth
US5768481A (en) * 1995-06-05 1998-06-16 Apple Computer, Inc. Method and apparatus for compression of digitized image data using a dynamic band recompression scheme
US6011540A (en) * 1997-03-28 2000-01-04 Sun Microsystems, Inc. Method and apparatus for generating small, optimized color look-up tables

Also Published As

Publication number Publication date
AU3887600A (en) 2000-10-23
WO2000060479A1 (en) 2000-10-12

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