EP0506937A1 - Verfahren zur farbsteuerung auf einem bildschirm. - Google Patents

Verfahren zur farbsteuerung auf einem bildschirm.

Info

Publication number
EP0506937A1
EP0506937A1 EP91919815A EP91919815A EP0506937A1 EP 0506937 A1 EP0506937 A1 EP 0506937A1 EP 91919815 A EP91919815 A EP 91919815A EP 91919815 A EP91919815 A EP 91919815A EP 0506937 A1 EP0506937 A1 EP 0506937A1
Authority
EP
European Patent Office
Prior art keywords
palette
color
images
screen
colors
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.)
Granted
Application number
EP91919815A
Other languages
English (en)
French (fr)
Other versions
EP0506937B1 (de
Inventor
Dominique Coquelet
Jean-Francois 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
Application granted granted Critical
Publication of EP0506937B1 publication Critical patent/EP0506937B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

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 ⁇ is associated with a color characterized by its three components R ⁇ red, V ⁇ green, B ⁇ 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 colors in the table is carried out using a special application allowing the transfer function to be modified.
  • the present invention relates to a method of exploiting colors allowing the simultaneous viewing on a same screen of graphics in vector mode and of color images while avoiding the aforementioned drawbacks.
  • the method of exploiting colors for the simultaneous representation on a screen of one or more color images which may include graphics using a single color palette attached to the screen, is of the type consisting in carrying out a correspondence between a numerical value and a color code of a color palette (LUT) and it is characterized in that: - the palette is broken down into a first static part of configurable size reserved for graphics and a second part additional dynamic reserved for images,
  • the second part of the palette is subdivided into as many ranges of codes necessary for the application, the number of ranges required being at most equal to the number of images to be represented,
  • an application is applied to the palette to modify the color correspondences to interactively vary the colors displayed on the screen for each pixel.
  • the code ranges assigned to each of the images are of identical size.
  • the method according to the invention is particularly interesting applied to the field of seismic 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.
  • FIG. 1 is a schematic representation of a palette of colors and its use according to the invention
  • FIG. 2 shows a screenshot on which are viewed, simultaneously and with perfectly adapted palettes managed by the method of the invention, two different outputs from the field of seismic, namely a portion of seismic section on which a horizon particular seismic was pointed out and the map of isochrones corresponding to this particular horizon,
  • FIG. 3 shows the screenshot for the same applications and outputs as those shown in Figure 2, with a conventional color palette management method.
  • 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 G of color cells.
  • the thirty-one cells C Q to C 3Q 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 C 31 to C 255 being reserved for the image part I.
  • the operator must provide another index - ⁇ , 1- ⁇ being greater than G.
  • 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 chose to work on this interval in a classic way so as to only show 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.
  • FIG. 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 gray tone (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.

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)
  • 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)
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 true EP0506937A1 (de) 1992-10-07
EP0506937B1 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9207349A1 *

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
EP0506937B1 (de) 1995-12-13

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