Computer display color control and selection system
First Claim
1. A user interface for controlling color selection in a computer system having a color display monitor, comprising:
- means for displaying on the monitor a graph depicting a range of hues in one dimension;
means for selecting any hue displayed on the hue graph in response to input from the user and generating data representing this hue;
means for displaying on the monitor a graph depicting chroma and lightness combinations in two-dimensions in a selected hue;
means for selecting any chroma and lightness combination displayed on the chroma and lightness graph in response to input from the user and generating data representing this chroma and lightness; and
register means for storing data representing one or more selected hue, chroma and lightness combinations.
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Accused Products
Abstract
An interface system allows a user to select and control colors used in graphic images generated by a computer system. The interface system employs graphical representations of the hue, chroma, and lightness combinations capable of being rendered by a computer graphics system. In a preferred embodiment, the graphical representation includes a one-dimensional graph (40) depicting the range of hues and a two-dimensional graph (42) depicting the range of chroma and value combinations available for a selected hue. The graphical representations are preferably rendered in accordance with a Hue-Value-Chroma ("HVC") color space (90) having a high degree of perceptual uniformity.
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Citations
13 Claims
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1. A user interface for controlling color selection in a computer system having a color display monitor, comprising:
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means for displaying on the monitor a graph depicting a range of hues in one dimension; means for selecting any hue displayed on the hue graph in response to input from the user and generating data representing this hue; means for displaying on the monitor a graph depicting chroma and lightness combinations in two-dimensions in a selected hue; means for selecting any chroma and lightness combination displayed on the chroma and lightness graph in response to input from the user and generating data representing this chroma and lightness; and register means for storing data representing one or more selected hue, chroma and lightness combinations. - View Dependent Claims (2, 3, 4, 5)
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6. A user interface for controlling color selection in a computer system for rendering a graphic image and having a color display monitor operating in accordance with a Red-Green-Blue color space, comprising:
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means for displaying on the monitor a one-dimensional graph of a range of hue selections representing hues based upon a Hue-Value-Chroma color space having substantial perceptual uniformity; means for selecting any hue displayed on the hue graph and generating data representing this hue in response to input from the user; means for displaying on the monitor a graph of chroma and value combinations in two dimensions representing chromas and values based upon the Hue-Value-Chroma color space in a selected hue; means for selecting any chroma and value combination displayed on the chroma and value graph and generating data representing this chroma and value in response to input from the user; and means for translating data representing a selected hue, chroma and value combination based upon the Hue-Value-Chroma color space into Red-Green-Blue data corresponding to the same color in the Red-Green-Blue color space of the monitor. - View Dependent Claims (7, 8, 9)
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10. In a computer system for rendering a color graphic image and having a color display monitor, a method of selecting a color in a color graphic image rendered by the computer system, comprising the steps of:
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displaying on the monitor a graph depicting a range of hues in one dimension; displaying on the monitor a graph depicting a range of chroma and lightness combinations in two-dimensions; and generating color data representing a selected hue and a selected chroma and lightness combination in response to a selection input from a computer operator, wherein said hue, chroma and lightness are defined as Hue, Chroma and Value dimensions, respectively, in a Hue-Value-Chroma color space having substantial perceptual uniformity.
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11. An apparatus for modifying the color characteristics of a color image formed from a plurality of pixels on a color display monitor, comprising:
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memory means for storing data relating to pixel color, including pixel index values and values defining specific colors in terms of hue (H), chroma (C) and lightness (L) parameters, each index value correlating a set of H, C and L values to at least one pixel; means for selecting a specific pixel for color modification; means for displaying on the monitor a graphical representation of hue, chroma and lightness combinations available based upon a color appearance-type color space characterized by perceptually uniform spacing between color selections; means for selecting any combination of hue, chroma and lightness graphically represented on the monitor in response to input from a user and generating data representing this combination; means for writing data representing a selected combination of H,C and L to the location within the memory means correlating with the selected pixel. - View Dependent Claims (12, 13)
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Specification