System and method for content-based querying using video compression format
First Claim
Patent Images
1. A method of implementing a content based image query, comprising:
- encoding at least two images in a sequence of frames;
using an encoding ratio as a distance measure between the two images; and
determining a degree of similarity between the two images by using the distance measure to estimate a differential amount of information between the two images.
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Abstract
A visual query system, and associated method and computer program product enhance and accelerate content-based querying, and present a new image similarity measure using known or available software applications and hardware components of video compression systems. The present system encodes images as consecutive frames in a video sequence and uses the ratio between the file length of the compressed sequence and the original file length as a distance measure. The system considers the compression ratio to be an estimate of the entropy of the combined images, which can be used to estimate the amount of new information introduced from one image to the other.
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Citations
40 Claims
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1. A method of implementing a content based image query, comprising:
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encoding at least two images in a sequence of frames;
using an encoding ratio as a distance measure between the two images; and
determining a degree of similarity between the two images by using the distance measure to estimate a differential amount of information between the two images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer program product having instruction codes for implementing a content based image query, comprising:
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a first set of instruction codes for encoding at least two images in a sequence of frames;
the first set of instruction codes uses an encoding ratio as a distance measure between the two images; and
a second set of instruction codes for determining a degree of similarity between the two images by using the distance measure to estimate a differential amount of information between the two images. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A visual query system for implementing a content based image query, comprising:
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means for encoding at least two images in a sequence of frames;
the encoding means uses an encoding ratio as a distance measure between the two images; and
means for determining a degree of similarity between the two images by using the distance measure to estimate a differential amount of information between the two images. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification