Apparatus and method for generating image feature data
First Claim
1. An apparatus for generating feature data of an image, comprising:
- a feature point determination unit for determining feature points from an image and extracting feature point information for the determined feature points;
a feature point filtering unit for determining one or more of the feature points determined by the feature point determination unit to be final feature points; and
a feature data generation unit for generating feature data of the image based on the final feature points determined by the feature point filtering unit and feature point information for the final feature points,wherein the feature point information extracted by the feature point determination unit includes intensities of the feature points,wherein the feature point filtering unit determines a point having a larger intensity than other points located in a surrounding area of a corresponding feature point to be a final feature point, based on the intensities of the feature points, andwherein the feature point filtering unit determines important points R2(ci) satisfying the expression
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Abstract
The present invention relates to an apparatus and method for efficiently generating feature data which properly determines a feature point indicating features of images and describes the feature point. The apparatus for generating image feature data comprises: a feature point determining unit which determines a feature point from an image and extracts information on the determined feature point; a feature point filtering unit which determines, as a final feature point, at least one feature point from among the feature points determined by the feature point determining unit; and a feature data generating unit which generates image feature data based on the final feature points determined by the feature point filtering unit and feature point information on the final feature points.
22 Citations
13 Claims
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1. An apparatus for generating feature data of an image, comprising:
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a feature point determination unit for determining feature points from an image and extracting feature point information for the determined feature points; a feature point filtering unit for determining one or more of the feature points determined by the feature point determination unit to be final feature points; and a feature data generation unit for generating feature data of the image based on the final feature points determined by the feature point filtering unit and feature point information for the final feature points, wherein the feature point information extracted by the feature point determination unit includes intensities of the feature points, wherein the feature point filtering unit determines a point having a larger intensity than other points located in a surrounding area of a corresponding feature point to be a final feature point, based on the intensities of the feature points, and wherein the feature point filtering unit determines important points R2(ci) satisfying the expression
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2. A method of generating feature data of an image, comprising:
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determining feature points from an image and extracting feature point information for the determined feature points; determining one or more of the determined feature points to be final feature points; and generating feature data of the image based on the determined final feature points and feature point information for the final feature points, wherein at the extracting feature point information for the determined feature points, the feature point information includes intensities of the feature points, wherein the step of determining one or more of the determined feature points to be final feature points is configured to determine a point having a larger intensity than other points located in a surrounding area of a corresponding feature point to be a final feature point, based on the intensities of the feature points, and to determine important points R2(ci) satisfying the expression
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3. An apparatus for generating feature data of an image, comprising:
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a feature point determination unit for determining feature points from an image and extracting feature point information for the determined feature points; a feature point orientation estimation unit for estimating pieces of orientation information for the respective feature points determined by the feature point determination unit; and a feature data generation unit for generating binary feature vectors based on the feature point information and the orientation information, for the respective feature points determined by the feature point determination unit, and generating feature data of the image including the generated binary feature vectors, wherein the feature data generation unit generates for the feature points, surrounding image areas including the respective feature points, aligns the generated surrounding images areas in an identical orientation, divides each of the aligned surrounding image areas into sub-regions, and generates the binary feature vectors based on averages of brightness values of the subs-regions. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of generating feature data of an image, comprising:
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determining feature points from an image and extracting feature point information for the determined feature points; estimating pieces of orientation information for the respective determined feature points; and generating binary feature vectors based on the feature point information and the orientation information, for the respective determined feature points, and generating feature data of the image including the generated binary feature vectors, wherein the step of generating feature data of the image including the generated binary feature vectors is configured to generate, for the feature points, surrounding image areas including the respective feature points, aligns the generated surrounding images areas in an identical orientation, divides each of the aligned surrounding image areas into sub-regions, and generates the binary feature vectors based on averages of brightness values of the subs-regions.
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Specification