Method and apparatus for representing a group of images
First Claim
1. A method of representing a group of images using at least one processor to process signals corresponding to the images, the method comprisingobtaining, using a processor, an image dominant colour representation for each image in the group of images, wherein each of the image dominant colour representations has one or more components including at least one dominant colour value, and optionally for each dominant colour value, a variance indicating colour distribution variance of the image with respect to the dominant colour value, a weight indicating the influence of the dominant colour in the image, the number of dominant colours in the image, and spatial homogeneity of pixels corresponding to the dominant colors in the image;
- determining, using a processor, the values of one or more dominant colours for the group of images;
deriving, using a processor, a group dominant colour representation expressing the group of images in terms of one or more of said dominant colour values by combining a plurality of said image dominant colour representations, wherein the combining involves calculating a weighted average of one or more of the dominant colour values, variances and weights, wherein for two dominant colours m1, m2, and respective weights W1 and W2, the combined variance has value
σ
2=w1σ
12+w2σ
22+w1w2(m1−
m2)2,where σ
12,σ
22 are the variances of the component clusters, m1, m2 are their means and w1, w2 are the relative weights, W1/W1+W2 and W2/W1+W2 respectively; and
storing the group dominant colour representation as a descriptor for the group of images.
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Accused Products
Abstract
A method of representing a group of images comprises determining the values of one or more dominant colors for the group of images and deriving a dominant color representation expressing the group of images in terms of one or more of said dominant color values.
29 Citations
7 Claims
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1. A method of representing a group of images using at least one processor to process signals corresponding to the images, the method comprising
obtaining, using a processor, an image dominant colour representation for each image in the group of images, wherein each of the image dominant colour representations has one or more components including at least one dominant colour value, and optionally for each dominant colour value, a variance indicating colour distribution variance of the image with respect to the dominant colour value, a weight indicating the influence of the dominant colour in the image, the number of dominant colours in the image, and spatial homogeneity of pixels corresponding to the dominant colors in the image; -
determining, using a processor, the values of one or more dominant colours for the group of images; deriving, using a processor, a group dominant colour representation expressing the group of images in terms of one or more of said dominant colour values by combining a plurality of said image dominant colour representations, wherein the combining involves calculating a weighted average of one or more of the dominant colour values, variances and weights, wherein for two dominant colours m1, m2, and respective weights W1 and W2, the combined variance has value
σ
2=w1σ
12+w2σ
22+w1w2(m1−
m2)2,where σ
12,σ
22 are the variances of the component clusters, m1, m2 are their means and w1, w2 are the relative weights, W1/W1+W2 and W2/W1+W2 respectively; andstoring the group dominant colour representation as a descriptor for the group of images. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification
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- Resources
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Current AssigneeRakuten Group, Inc.
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Original AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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InventorsCieplinski, Leszek
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Primary Examiner(s)Alavi; Amir
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Application NumberUS11/929,189Publication NumberTime in Patent Office875 DaysField of Search382/162, 382/164, 382/165, 382/167, 382/168, 382/172, 382/190, 382218-220, 382/226, 382/254, 382/272, 382/284, 382/305, 358/515, 358/518, 358/525, 358/530, 345/589, 345600-604US Class Current382/162CPC Class CodesG06F 16/5838 using colourG06F 16/7328 Query by example, e.g. a co...G06F 16/785 using colour or luminescenceG06T 7/90 Determination of colour cha...G06V 10/56 relating to colour
