Method for setting dominant color using spatial coherency
AssigneeLG Electronics Inc.
InventorHyeon Kim
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Abstract
The present invention discloses a method for setting a dominant color using a spatial coherency in order to improve performance of an image search function, describing an image region based on several dominant colors, a frequency of each dominant color, and a spatial coherency (SC) of the dominant color. In the method according to the present invention, the spatial coherency is non-uniformly quantized based on a predetermined threshold. According to one embodiment of the present invention, the spatial coherency (SC) is ranged from 0 to 1 and the threshold is set to 0.70.
Claims6
A method for quantizing spatial coherency of a dominant color of an image region, comprising:
- quantizing a normalized value for the spatial coherency responsive to a relationship between the normalized spatial coherency value and a prescribed threshold.
A method for quantizing spatial coherency of at least one dominant color of an image region, comprising:
- normalizing a weighted sum of per-dominant color-spatial coherencies from 0 to 1;
- and
- non-uniformly quantizing the normalized spatial coherency to a predetermined range, wherein the normalized values of spatial coherency less than a first predetermined value are set to a quantized value of a first predetermined range, and wherein the normalized values of spatial coherency in connection with a second predetermined value are uniformly quantized to a quantized second predetermined range.
A method for describing an image region by using at least one dominant color and a spatial coherency on said at least one dominant color, comprising:
- describing a normalized spatial coherency of at least one dominant color using 31 bins by:
- quantizing normalized values of spatial coherency less than 0.7 to a quantized value of 1, and
- uniformly quantizing the normalized values of spatial coherency from 0.7 to 1 to the quantized range from 2 to 31.
Dependencies are inferred from the claim text.