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WO1998010405A1 - Procede de commande de l'ombrage d'une image dependant de la resolution de l'image - Google Patents

Procede de commande de l'ombrage d'une image dependant de la resolution de l'image Download PDF

Info

Publication number
WO1998010405A1
WO1998010405A1 PCT/US1997/015100 US9715100W WO9810405A1 WO 1998010405 A1 WO1998010405 A1 WO 1998010405A1 US 9715100 W US9715100 W US 9715100W WO 9810405 A1 WO9810405 A1 WO 9810405A1
Authority
WO
WIPO (PCT)
Prior art keywords
display
intended
type
resolution
low resolution
Prior art date
Application number
PCT/US1997/015100
Other languages
English (en)
Inventor
Silviu Palalau
William Rogers
William Tanski
Original Assignee
United Technologies Automotive, Inc.
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 United Technologies Automotive, Inc. filed Critical United Technologies Automotive, Inc.
Publication of WO1998010405A1 publication Critical patent/WO1998010405A1/fr

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
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2044—Display of intermediate tones using dithering
    • G09G3/2051—Display of intermediate tones using dithering with use of a spatial dither pattern
    • 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

Definitions

  • This invention relates to a method of controlling visual display image shading. More particularly, this invention relates to a method of choosing between alternative modes of image shading control depending on the level of resolution required for a particular visual display.
  • This invention is a method of utilizing one or more image shading control techniques depending on the type of information to be displayed. More specifically, this invention is a method of choosing between image shading control techniques depending on whether a generated display requires high resolution or low resolution graphics.
  • this invention is a method of controlling display image shading in an electrical visual display system having a display screen.
  • the method includes several basic steps. First, two display types are defined; a first display type that requires high resolution and a second display type that requires low resolution. A determination is made whether an intended visual display is of the first display type or the second display type. When the intended display is a first display type, the display is generated on the display screen using a first image shading technique. When the intended display is a second display type, the display is generated on the display screen using a second image shading technique.
  • frame modulation is the preferred technique of image shading control.
  • the preferred image shading technique is spatial dithering.
  • Figure 1 is a schematic illustration of a visual display system.
  • Figure 2 is a flow chart diagram illustrating the methodology of this invention.
  • Figure 1 schematically illustrates a visual display system including a computer memory and data processing module 4 and a video controller 6.
  • Information from the computer memory and data processing module 4 is utilized by the video controller 6 to control a visual display displayed on a display screen 8.
  • the display screen 8 is a flat panel display adapted to provide an electroluminescent display or a liquid crystal display, for example.
  • the video controller 6 is also electrically coupled with various other input devices for receiving and processing information that may be used to modify or generate a display on the display screen 8.
  • various other input devices for receiving and processing information that may be used to modify or generate a display on the display screen 8.
  • one skilled in the art can select from among commercially available microprocessors or develop specific circuitry to realize the data processing module 4 and the controller 6.
  • one skilled in the art can develop specific code for programming the controller 6 and module 4 for performing the functions associated with this invention.
  • Figure 2 contains a flow chart 10 that illustrates the methodology of this invention.
  • This invention optimizes the use of gray shades and colors in flat panel displays by choosing between at least two types of techniques for controlling image shading depending on whether the image requires high resolution or low resolution.
  • a frame modulation technique is utilized. Frame modulation provides high resolution but limited numbers of shades.
  • spatial dithering techniques preferably are used.
  • the video controller 6 determines which technique to use based upon the resolution required for a particular display or portion of a display.
  • an intended display is formulated at step 12.
  • the intended display may include a variety of types of graphics. For example, if the intended display is a map, there would be graphical illustrations of roads or topography and overlying textual descriptions of roads and locations, for example.
  • the level of resolution that is required for a satisfactory display is determined at the step 14.
  • a high resolution coefficient is assigned at 16.
  • a low resolution coefficient is assigned to a given display at 18.
  • the steps 12 through 18 preferably are accomplished by the memory and data processing module 4 when formulating a databank or set of displays that will be generated on the display screen 8.
  • the video controller 6 defines high and low resolution display types at 20 depending on the contents of a particular display. In some instances, an entire display will be of one type or the other. In other words, some displays will require high resolution throughout the entire display, while others may require only low resolution throughout the entire display. This invention is not limited to displays that require high or low resolution across an entire display. Some displays, such as the map example mentioned above, will be able to be generated using high resolution for portions of the display and low resolution for other portions. This invention includes utilizing separate image shading techniques for the various portions of such a display.
  • the video controller 6 determines the type of display at 22. A decision is made at 24 whether the display requires high resolution image shading. If it requires high resolution, then the display is generated using a frame modulation technique at 26. Developing specific circuitry or software for accomplishing a frame modulation technique can be developed by those skilled in the art and, therefore, need not be further described in this specification.
  • the video controller 6 When low resolution should be used, the video controller 6 generates the display using a spatial dithering technique at 28. Developing specific circuitry or software for accomplishing a spatial dithering technique is within the scope of those skilled in the art and, therefore, need not be further described in this specification.
  • the video controller In those circumstances where a display requires high resolution for some portions of the display but low resolution for other portions, the video controller generates the display using frame modulation techniques and spatial dithering techniques as needed for the various portions of the display at 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

Cette invention concerne un procédé de commande de l'ombrage d'une image générée sur un dispositif de visualisation, qui consiste à évaluer si l'image nécessite un traitement d'ombrage à haute résolution ou à faible résolution. Lorsque la haute résolution est nécessaire, on met en oeuvre un procédé de modulation d'image. Lorsque la faible résolution est nécessaire, on met en oeuvre un procédé de juxtaposition spatiale. L'invention se rapporte également à la division d'une image en diverses parties pouvant nécessiter chacune soit une haute résolution soit une faible résolution. Dans ce cas, on utilise, selon les besoins, un procédé à haute résolution pour certaines parties de l'image et un procédé à faible résolution pour les autres parties de l'image.
PCT/US1997/015100 1996-09-03 1997-08-27 Procede de commande de l'ombrage d'une image dependant de la resolution de l'image WO1998010405A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70715696A 1996-09-03 1996-09-03
US08/707,156 1996-09-03

Publications (1)

Publication Number Publication Date
WO1998010405A1 true WO1998010405A1 (fr) 1998-03-12

Family

ID=24840572

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/015100 WO1998010405A1 (fr) 1996-09-03 1997-08-27 Procede de commande de l'ombrage d'une image dependant de la resolution de l'image

Country Status (1)

Country Link
WO (1) WO1998010405A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003088680A2 (fr) * 2002-04-12 2003-10-23 Sendo International Limited Traitement d'images ou de vidéo
EP1396838A1 (fr) * 2001-06-13 2004-03-10 Kawasaki Microelectronics, Inc. Procede et appareil de commande des cristaux liquides d'une matrice simple

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0421772A2 (fr) * 1989-10-06 1991-04-10 Canon Kabushiki Kaisha Dispositif d'affichage
US5245328A (en) * 1988-10-14 1993-09-14 Compaq Computer Corporation Method and apparatus for displaying different shades of gray on a liquid crystal display
EP0570906A1 (fr) * 1992-05-19 1993-11-24 Canon Kabushiki Kaisha Méthode et dispositif de commande d'affichage
EP0673012A2 (fr) * 1994-03-11 1995-09-20 Canon Information Systems Research Australia Pty Ltd. Commande d'affichage avec lignes communes multiples pour chaque pixel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5245328A (en) * 1988-10-14 1993-09-14 Compaq Computer Corporation Method and apparatus for displaying different shades of gray on a liquid crystal display
EP0421772A2 (fr) * 1989-10-06 1991-04-10 Canon Kabushiki Kaisha Dispositif d'affichage
EP0570906A1 (fr) * 1992-05-19 1993-11-24 Canon Kabushiki Kaisha Méthode et dispositif de commande d'affichage
EP0673012A2 (fr) * 1994-03-11 1995-09-20 Canon Information Systems Research Australia Pty Ltd. Commande d'affichage avec lignes communes multiples pour chaque pixel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1396838A1 (fr) * 2001-06-13 2004-03-10 Kawasaki Microelectronics, Inc. Procede et appareil de commande des cristaux liquides d'une matrice simple
EP1396838A4 (fr) * 2001-06-13 2008-04-30 Kawasaki Microelectronics Inc Procede et appareil de commande des cristaux liquides d'une matrice simple
US7403195B2 (en) 2001-06-13 2008-07-22 Kawasaki Microelectronics, Inc. Method and apparatus for driving passive matrix liquid crystal
WO2003088680A2 (fr) * 2002-04-12 2003-10-23 Sendo International Limited Traitement d'images ou de vidéo
WO2003088680A3 (fr) * 2002-04-12 2004-02-26 Sendo Int Ltd Traitement d'images ou de vidéo

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