Method and apparatus for indexing and searching graphic elements
First Claim
1. An indexation method for indexing a graphic element, comprising the steps of:
- determining a color attribute of the graphic element by providing a set of coordinates in a multidimensional color space (80) for at least one color of the color attribute, reducing the set of coordinates of said at least one color to a level of Hue if said at least one color verifies a first condition, reducing the set of coordinates of said at least one color to a level of Brightness if said at least one color verifies a second condition, storing indexation data (13) for indexing said graphic element, said indexation data including a level of Hue resulting from said at least one color of the color attribute and/or a level of Brightness resulting from said at least one color of the color attribute.
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Abstract
In an indexation method, an average color or a statistical distribution of colors in an image is determined by providing a set of coordinates in a multidimensional color space (80). The set of coordinates of each color is reduced to a level of Hue if the color verifies a first condition, i.e. the color is considered a true color (81), and to a level of Brightness if the color verifies a second condition, i.e. the color is considered a gray color (82). Indexation data for indexing the image includes the level of Hue or Brightness resulting from each color. The indexation method is used in a search method for searching a collection of graphic elements. An input specifies a desired color. A corresponding search query pertains to a level of Hue or a level of Brightness if the desired color includes a true color, or a gray color respectively.
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Citations
14 Claims
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1. An indexation method for indexing a graphic element, comprising the steps of:
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determining a color attribute of the graphic element by providing a set of coordinates in a multidimensional color space (80) for at least one color of the color attribute, reducing the set of coordinates of said at least one color to a level of Hue if said at least one color verifies a first condition, reducing the set of coordinates of said at least one color to a level of Brightness if said at least one color verifies a second condition, storing indexation data (13) for indexing said graphic element, said indexation data including a level of Hue resulting from said at least one color of the color attribute and/or a level of Brightness resulting from said at least one color of the color attribute. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An indexation apparatus (1) for indexing a graphic element, comprising:
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a color analyzer (12) for determining a color attribute of the graphic element by providing a set of coordinates in a multidimensional color space (80) for at least one color of the color attribute, for reducing the set of coordinates of said at least one color to a level of Hue if said at least one color verifies a first condition, and for reducing the set of coordinates of said at least one color to a level of Brightness if said at least one color verifies a second condition, storage means (6, 7) for storing indexation data (13) for indexing said graphic element, said indexation data including a level of Hue resulting from said at least one color of the color attribute and/or a level of Brightness resulting from said at least one color of the color attribute. - View Dependent Claims (12, 13, 14)
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Specification