Image ranking based on abstract concepts
First Claim
1. A method for ranking images comprising:
- receiving a query comprising a semantic part and an abstract part;
retrieving a set of images responsive to the semantic part of the query;
computing first scores for the retrieved images in the set of retrieved images, each first score being based on a relevance of a retrieved image to the semantic part of the query;
computing a chromatic concept model for each of a set of abstract concepts, the chromatic concept model comprising a Gaussian Mixture Model wherein observations for the Gaussian mixture model are colors of at least one color palette which is associated with the abstract concept expressed in a perceptually uniform color space;
identifying one of the set of chromatic concept models, based on the abstract part of the query;
for retrieved images in the set of retrieved images;
computing a chromatic image model based on colors of the image, the chromatic image model comprising a weighted set of colors expressed in the perceptually uniform color space, andcomputing a comparison measure between the chromatic image model and the identified chromatic concept model;
computing second scores for the retrieved images that are based on the computed comparison measures; and
ranking the retrieved images based on a combined score for a respective retrieved image which is a function of the first and second scores.
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Abstract
A system and method for ranking images are provided. The method includes receiving a query comprising a semantic part and an abstract part, retrieving a set of images responsive to the semantic part of the query, and computing first scores for the retrieved images in the set of retrieved images. The first score of an image can be based on a relevance of that image to the semantic part of the query (and not to the abstract part of the query). The method further includes identifying a chromatic concept model from a set of chromatic concept models. This identification can be based on the abstract part of the query (and not on the semantic part of the query). The chromatic concept model includes an optionally-weighted set of colors expressed in a perceptually uniform color space. For retrieved images in the set of retrieved images, the method includes computing a chromatic image model based on colors of the image, the chromatic image model comprising a weighted set of colors expressed in the perceptually uniform color space and computing a comparison measure between the chromatic image model and the chromatic concept model. The retrieved images are scored with respective second scores that are based on the computed comparison measures. The retrieved images are ranked based on a combined score for a respective retrieved image which is a function of the first and second scores.
42 Citations
18 Claims
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1. A method for ranking images comprising:
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receiving a query comprising a semantic part and an abstract part; retrieving a set of images responsive to the semantic part of the query; computing first scores for the retrieved images in the set of retrieved images, each first score being based on a relevance of a retrieved image to the semantic part of the query; computing a chromatic concept model for each of a set of abstract concepts, the chromatic concept model comprising a Gaussian Mixture Model wherein observations for the Gaussian mixture model are colors of at least one color palette which is associated with the abstract concept expressed in a perceptually uniform color space; identifying one of the set of chromatic concept models, based on the abstract part of the query; for retrieved images in the set of retrieved images; computing a chromatic image model based on colors of the image, the chromatic image model comprising a weighted set of colors expressed in the perceptually uniform color space, and computing a comparison measure between the chromatic image model and the identified chromatic concept model; computing second scores for the retrieved images that are based on the computed comparison measures; and ranking the retrieved images based on a combined score for a respective retrieved image which is a function of the first and second scores. - View Dependent Claims (2, 3, 4, 5, 6, 10, 11, 14, 15, 16, 17, 18)
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7. A method for ranking images comprising:
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receiving a query comprising a semantic part and an abstract part; retrieving a set of images responsive to the semantic part of the query; computing first scores for the retrieved images in the set of retrieved images, each first score being based on a relevance of a retrieved image to the semantic part of the query; identifying one of a set of chromatic concept models, based on the abstract part of the query, the identified chromatic concept model comprising an optionally-weighted set of colors expressed in a perceptually uniform color space which has a lightness component and two chromatic components; for retrieved images in the set of retrieved images; computing a chromatic image model based on colors of the image, the chromatic image model comprising a weighted set of colors expressed in the perceptually uniform color space, and wherein the colors of the chromatic image model are expressed only in the chromatic components of the perceptually uniform color space, and computing a comparison measure between the chromatic image model and the identified chromatic concept model; computing second scores for the retrieved images that are based on the computed comparison measures; and ranking the retrieved images based on a combined score for a respective retrieved image which is a function of the first and second scores. - View Dependent Claims (8, 9)
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12. A method for ranking images comprising:
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receiving a query comprising a semantic part and an abstract part; retrieving a set of images responsive to the semantic part of the query; computing first scores for the retrieved images in the set of retrieved images, each first score being based on a relevance of a retrieved image to the semantic part of the query; identifying one of a set of chromatic concept models, based on the abstract part of the query, the identified chromatic concept model comprising an optionally-weighted set of colors expressed in a perceptually uniform color space; for retrieved images in the set of retrieved images; computing a chromatic image model based on colors of the image, the chromatic image model comprising a weighted set of colors expressed in the perceptually uniform color space, and computing a comparison measure between the chromatic image model and the identified chromatic concept model, wherein the computing of the comparison measure between the chromatic image model and the chromatic concept model comprises computing a Color-based Earth Mover'"'"'s Distance (CEMD) according to the expression; - View Dependent Claims (13)
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Specification