Apparatus and method for color selection

• US 5,103,407 A
• Filed: 02/20/1990
• Issued: 04/07/1992
• Est. Priority Date: 02/21/1989
• Status: Expired due to Fees

• Current Assignee: CREO Company Limited
• Original Assignee: Scitex Corporation
• Inventors: Gabor, Akiva P.
• Primary Examiner(s): Evans, Arthur G.
• Application Number:
  US07/482,435
• Time in Patent Office: 777 Days
• Field of Search: 364/518-521, 364/237.2 MS, 364/927.3 MS, 340/701-704, 340/750, 358/75, 358/80, 358/1, 358/10, 346/154, 346/157
• US Class Current: 345/601
• CPC Class Codes: G06F 3/04842 Selection of displayed objects or displayed text elements G06F3/0482 takes precedence
• CPC Class Codes: G06F 3/04845 for image manipulation, e.g. dragging, rotation, expansion or change of colour
• CPC Class Codes: G06T 11/001 Texturing; Colouring; Generation of texture or colour inpainting G06T5/77

Abstract

Apparatus and method for color selection comprising apparatus defining a color display and selection space including a first area in which colors of a range of different hues are displayed at substantially predetermined levels of luminance and saturation and a second area in which colors of a selected hue, selectable from said range of different hues, and of differing saturation and luminance are displayed.

Claims

1. Apparatus for color selection comprising:

color display means providing a color selection space including a first area in which colors of a range of different hues are displayed at generally uniform levels of luminance and saturation and a second area in which colors of a given hue, selectable from said range of different hues and of differing saturation and luminance are displayed; and

operator controlled computerized color selection means for uniquely determining a desired color in respect of hue, luminance and saturation including;

hue selection means enabling an operator to select a hue for display in the second area from among the hues displayed in the first area; and

saturation and luminance selection means enabling an operator to select saturation and luminance of the hue from the saturation and luminance displayed in the second area.

2. Apparatus according to claim 1 and wherein in said first area said colors are displayed in at least one one-dimensional grid.

3. Apparatus according to claim 2 and wherein said at least one one-dimensional grid is operative to display said colors at a relatively low resolution and at uniform levels of luminance and saturation.

4. Apparatus according to claim 2 and wherein said at least one one-dimensional grid is operative to display said colors covering the full available range of hues.

5. Apparatus according to claim 3 and wherein said at least one one-dimensional grid is operative to display said colors covering the full available range of hues.

6. Apparatus according to claim 2 and wherein said at least one one-dimensional grid comprises a plurality of one-dimensional grids including also a one-dimensional grid which displays at relatively high resolution a relatively limited range of hues about a selected hue generally at selected levels of luminance and saturation.

7. Apparatus according to claim 3 and wherein said at least one one-dimensional grid comprises a plurality of one-dimensional grids including also a one-dimensional grid which displays at relatively high resolution a relatively limited range of hues about a selected hue generally at selected levels of luminance and saturation.

8. Apparatus according to claim 4 and wherein said at least one one-dimensional grid comprises a plurality of one-dimensional grids including also a one-dimensional grid which displays at relatively high resolution a relatively limited range of hues about a selected hue generally at selected levels of luminance and saturation.

9. Apparatus according to claim 1 and wherein in said second area said colors are displayed in a two-dimensional grid.

10. Apparatus according to claim 1 and wherein in said second area, variations in saturation and luminance are displayed along mutually orthogonal axes.

11. Apparatus according to claim 1 and wherein in said first and second areas, colors are displayed in color blocks and wherein the color of each color block is a central color of a range of colors represented by said color block.

12. Apparatus according to claim 11 and wherein the selection location of a color within a color block defines which color of said range of colors is selected.

13. Apparatus according to claim 1 and also comprising means for selection of a pair of colors, a first color constituting a constant reference for a second selectable color displayed in said first and second areas.

14. Apparatus according to claim 1 and also comprising areas for the display of a reference color and a selected color said reference color being selected from an image on the screen and said selected color being the color to replace said reference color.

15. A color selection method comprising the steps of:

defining using a computer a color display and selection space including a first area in which colors of a range of different hues are displayed and a second area in which colors of a given hue, selectable from said range of different hues, and of differing luminance and saturation are displayed;

iteration using a computer in any order of the following mutually independent operations;

a. for given luminance-saturation levels, selecting a given hue from the first area; and

b. for a given hue, selecting a color of given luminance and saturation from the second area.

16. A method for selection of two associated colors comprising the steps of:

defining using a computer a color display and selection space including a first area in which first colors of a range of different hues are displayed against the background of a second reference color and a second area in which first colors of a given hue, selectable from said range of different hues, and of differing luminance and saturation are displayed against the background of said second reference color;

selecting a reference color using a computer;

varying, by using a computer, said first color iteratively in any order of the following mutually independent operations;

a. for given luminance-saturation levels, selecting a given hue from the first area; and

b. for a given hue, selecting a color of given luminance and saturation from the second area.

17. A method according to claim 16 and also comprising the steps of interchanging the first and second colors.

18. A color selection method comprising the steps of:

providing apparatus for color selection comprising;

color display means providing a color selection space including a first area in which colors of a range of different hues are displayed at generally uniform levels of luminance and saturation and a second area in which colors of a given hue, selectable from said range of different hues and of differing saturation and luminance are displayed; and

operator controlled computerized color selection means for uniquely determining a desired color in respect of hue, luminance and saturation including;

hue selection means enabling an operator to select a hue for display in the second area from among the hues displayed in the first area; and

saturation and luminance selection means enabling an operator to select saturation and luminance of the hue from the saturation and luminance displayed in the second area;

selecting a reference color by using a computer; and

iterating using a computer in any order of the following mutually independent operations;

a. for given luminance-saturation levels, selecting a given hue from the first area; and

b. for a given hue, selecting a color of given luminance and saturation from the second area.

19. A method for selection of two associated colors comprising the steps of:

providing apparatus for color selection comprising;

color display means providing a color selection space including a first area in which colors of a range of different hues are displayed at generally uniform levels of luminance and saturation and a second area in which colors of a given hue, selectable from said range of different hues and of differing saturation and luminance are displayed; and

operator controlled computerized color selection means for uniquely determining a desired color in respect of hue, luminance and saturation including;

hue selection means enabling an operator to select a hue for display in the second area from among the hues displayed in the first area; and

saturation and luminance selection means enabling an operator to select saturation and luminance of the hue from the saturation and luminance displayed in the second area;

selecting a reference color using a computer;

varying, by using a computer, said first color iteratively in any order of the following mutually independent operations;

a. for given luminance-saturation levels, selecting a given hue from the first area; and

b. for a given hue, selecting a color of given luminance and saturation from the second area.