EP0506937B1 - Verfahren zur farbsteuerung auf einem bildschirm - Google Patents

Verfahren zur farbsteuerung auf einem bildschirm Download PDF

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Publication number
EP0506937B1
EP0506937B1 EP91919815A EP91919815A EP0506937B1 EP 0506937 B1 EP0506937 B1 EP 0506937B1 EP 91919815 A EP91919815 A EP 91919815A EP 91919815 A EP91919815 A EP 91919815A EP 0506937 B1 EP0506937 B1 EP 0506937B1
Authority
EP
European Patent Office
Prior art keywords
images
palette
colour
screen
codes
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 - Lifetime
Application number
EP91919815A
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English (en)
French (fr)
Other versions
EP0506937A1 (de
Inventor
Dominique Coquelet
Jean-François MEFFRE
Naamen Keskes
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.)
Societe Nationale Elf Aquitaine Production SA
Original Assignee
Societe National Elf Aquitaine
Societe Nationale Elf Aquitaine Production SA
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 Societe National Elf Aquitaine, Societe Nationale Elf Aquitaine Production SA filed Critical Societe National Elf Aquitaine
Publication of EP0506937A1 publication Critical patent/EP0506937A1/de
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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

Definitions

  • the present invention relates to a method for exploiting colors on a computer screen allowing simultaneous visualization of graphics and color images, in particular under "X-windows".
  • each code C i is associated with a color characterized by its three components R i red, V i green, B i blue, thanks to a correspondence established in a table also called palette of colors (or LUT or Look up Table, table of false colors, colormap ...) attached to the screen.
  • the content of the color palette defines a transfer function between codes and colors.
  • the use of the color palette for memory output defines a memory architecture allowing image representation with reduced memory capacity. It also makes it possible to quickly, interactively and independently modify the image, without changing the table content or completely rewriting the image memory, the correspondences between the codes and the colors. This interactive modification of the distribution of the colors in the table is carried out thanks to a particular application allowing to modify the transfer function.
  • a known technique for simultaneously displaying color images on a screen consists in writing quantized input images in an image buffer memory and in accessing a color palette by the contents. of said buffer.
  • the color palette is divided into a first part or shared zone, memorizing the colors used in common by a plurality of color images to be displayed simultaneously, and a second part subdivided into a plurality of particular zones each memorizing the colors specific to the 'one of the color images to display.
  • the images displayed simultaneously on the screen have colors resulting from the association of colors common to the various images and memorized in the first part of the palette of colors and of own colors memorized, for each image, in the zone of the second part. of the color palette that is assigned to the image in question.
  • EP-A-0202426 digital using a regenerative buffer addressable at all points to control a raster scan display through a color palette.
  • the display can be divided into several zones (for example into four zones), each corresponding to a specific zone of color codes from the color palette.
  • the present invention relates to an exploitation of colors allowing the simultaneous viewing on a same screen of graphics in vector mode and of color images while avoiding the drawbacks mentioned above.
  • the subject of the invention is a method of exploiting colors for the simultaneous representation of one or more color images which may include graphics on a screen to which a single color palette is attached, by performing a correspondence between values.
  • numeric and color codes of the color palette in which the color palette is broken down into a first part defining a first range of color codes and a second part complementary to the first part and subdivided into a number of secondary ranges of color codes at most equal to the number of images to be represented, the images are assigned code ranges of the color palette and the images are displayed on the screen through the appropriate code ranges of the color palette, said method being characterized in that the first part of the color palette is a static part, of configurable size, reserved exclusively for visualization of graphics, in that we assign to each of the images to be viewed a single range of color codes chosen from the different secondary ranges, the whole of which constitutes the second part of the color palette, which second part is a dynamic part, and in that, for each image, an application is applied to the color palette modifying the color
  • the code ranges assigned to each of the images are of identical size.
  • the method according to the invention is particularly advantageous applied to the field of seismics for the simultaneous representation of a seismic section and of the isovalue map associated with one of the pointed horizons of the section.
  • the method according to the invention makes it possible to use only one palette of colors for the screen. By reserving a first range of colors for the graphics, you can view graphics without disturbing the images. The possible breakdown of the second range into different intervals makes it possible to simultaneously view different images each having their associated color codes.
  • the color palette represented schematically in FIG. 1 conventionally consists of 256 cells of colors Cj, j varying from 0 to 255.
  • the operator working at his console fixes the quantity J G of the first range of colors G reserved for the graph by indicating, for example, a number J G of color cells.
  • the thirty-one cells C o to C30 are reserved for the graph, (that is to say, for example, the indications of the kind of those referenced (3) in FIGS. 2 and 3), the cells C31 to C255 being reserved for the image part I.
  • the operator must provide another index J I1 , I1 being greater to G.
  • J I1 130 so that cells C31 to C130 are reserved for a first image I1 and cells C131 to C255 are reserved for a second image I2.
  • the range sizes can be fixed or fixed automatically.
  • an example of a reliable simple convention consists in characterizing an image range by a number N giving the number of ranges of equal size forming the partition of the second part I of the palette and a number M varying from 1 to N making it possible to precisely define the range to use in this partition.
  • the colors can be conventionally manipulated: loading of predefined palettes, deformation of these predefined palettes (contraction, inversion %), masks, definition of a new set of colors better suited to the image being viewed and saved to disk, for example.
  • the minimum size of a range is one cell, potentially allowing the scanning of 256 different colors.
  • Image (1) shows a variable area seismic section in black and white.
  • the magnitude represented is an amplitude which can vary between - 32,000 and + 32,000 depending on a time T and a distance X, this range of values constituting a sketch to which cells 31 to 130 of the palette have been made to correspond here.
  • basic colors We have chosen to work on this interval in a classic way so as to make appear only black and white (we apply a step function to the transfer function), so that the negative amplitudes are represented in black and the amplitudes positive in white, which is the usual representation of a seismic section.
  • the 2 represents the isochron map associated with the horizon (4) appearing on the image (1).
  • the value represented is a time as a function of a distance X and a distance Y.
  • the correspondence is here made between a time range between 1.100 to 2.500ms and the cells 131 to 255.
  • the applied function is linear so that each shade of gray (each corresponding to a color) is associated with a given time slice, the darkest tone corresponding to the lowest time slice and the least dark to the highest time slice.
  • FIG. 3 makes it possible to measure the advantage of the method according to the invention.
  • the part of the color palette reserved for the image has not been broken down into two ranges so that the color palette used is a correspondence between a sketch of values varying between - 32,000 and + 32,000 and cells C31 to C255. It is not possible with a single palette to have simultaneously on the screen a satisfactory image of the seismic section which requires a staircase function and a satisfactory image of the map which requires a linear function. The operator will then have to illuminate either one of the two images called up on the screen, or the other of these two images.

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  • 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)
  • Image Generation (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Digital Computer Display Output (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Claims (3)

  1. Verfahren zur Farberzeugung für die gleichzeitige Darstellung eines oder mehrerer farbiger Bilder, die eine Graphik enthalten können, auf einem Bildschirm, an den nur eine einzige Farbenpalette angeschlossen ist, indem eine Entsprechung zwischen numerischen Werten und Farbkodes der Farbenpalette hergestellt wird, bei welchem
    - die Farbenpalette in einen ersten Teil, der einen ersten Bereich von Farbkodes definiert, und einen zweiten Teil unterteilt wird, der zu dem ersten Teil komplementär und in eine Anzahl sekundärer Bereiche von Farbkodes unterteilt ist, die höchstens so groß ist wie die Anzahl der darzustellenden Bilder,
    - den Bildern Kodebereiche der Farbenpalette zugeordnet werden und
    - die Bilder auf dem Bildschirm durch die geeigneten Kodebereiche der Farbenpalette angezeigt werden,
    wobei das Verfahren dadurch gekennzeichnet ist, daß
    - der erste Teil der Farbenpalette ein statischer Teil von parametrierbarer Größe ist, der ausschließlich für die optische Darstellung der Graphik reserviert ist,
    - jedem der optisch darzustellenden Bilder ein einziger Bereich von Farbkodes zugeordnet wird, der aus den verschiedenen sekundären Bereichen ausgewählt wird, deren Gesamtheit den zweiten Teil der Farbenpalette bildet, wobei der zweite Teil ein dynamischer Teil ist, und
    - für jedes Bild an der Farbenpalette eine Anwendung durchgeführt wird, die die Farbentsprechungen modifiziert, um zu bewirken, daß die auf dem Bildschirm angezeigten Farben für jedes Pixel des Bildes interaktiv variieren.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Kodebereiche, die jedem der darzustellenden Bilder zugeordnet werden, von identischer Größe sind.
  3. Anwendung des Verfahrens nach Anspruch 1 oder 2 auf die gleichzeitige Darstellung eines seismischen Abschnitts und einer Karte mit Isowerten, die einem der angezielten Horizonte des Abschnitts zugeordnet ist.
EP91919815A 1990-10-22 1991-10-21 Verfahren zur farbsteuerung auf einem bildschirm Expired - Lifetime EP0506937B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9013044A FR2668276B1 (fr) 1990-10-22 1990-10-22 Procede d'exploitation des couleurs sur ecran.
FR9013044 1990-10-22
PCT/FR1991/000823 WO1992007349A1 (fr) 1990-10-22 1991-10-21 Procede d'exploitation des couleurs sur ecran

Publications (2)

Publication Number Publication Date
EP0506937A1 EP0506937A1 (de) 1992-10-07
EP0506937B1 true EP0506937B1 (de) 1995-12-13

Family

ID=9401444

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91919815A Expired - Lifetime EP0506937B1 (de) 1990-10-22 1991-10-21 Verfahren zur farbsteuerung auf einem bildschirm

Country Status (7)

Country Link
EP (1) EP0506937B1 (de)
JP (1) JPH05503387A (de)
CA (1) CA2071966A1 (de)
DE (1) DE69115463T2 (de)
FR (1) FR2668276B1 (de)
NO (1) NO303420B1 (de)
WO (1) WO1992007349A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2097560A1 (en) * 1992-06-16 1993-12-17 Laurence A. Clawson Device dependent layer of windowing system for a process control system display
EP0574630B1 (de) * 1992-06-19 1997-03-19 International Business Machines Corporation Rechner-Anzeigesystem mit Fenstern
US5319742A (en) * 1992-08-04 1994-06-07 International Business Machines Corporation Image enhancement with mask having fuzzy edges

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672368A (en) * 1985-04-15 1987-06-09 International Business Machines Corporation Raster scan digital display system
JPS628193A (ja) * 1985-07-04 1987-01-16 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション カラー画像表示装置

Also Published As

Publication number Publication date
NO922401D0 (no) 1992-06-18
NO922401L (no) 1992-06-18
FR2668276A1 (fr) 1992-04-24
WO1992007349A1 (fr) 1992-04-30
JPH05503387A (ja) 1993-06-03
CA2071966A1 (fr) 1992-04-23
DE69115463T2 (de) 1996-07-11
DE69115463D1 (de) 1996-01-25
NO303420B1 (no) 1998-07-06
FR2668276B1 (fr) 1992-12-31
EP0506937A1 (de) 1992-10-07

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