APPARATUS AND METHOD FOR EXTRACTING TARGET, AND RECORDING MEDIUM STORING PROGRAM FOR PERFORMING THE METHOD
First Claim
1. A method of extracting a target, the method comprising:
- extracting a background image from an input image;
modeling brightness values of the input image and the background image based on a Gaussian distribution to generate an input image modeling result and a background image modeling result;
calculating likelihood ratios for determining whether a pixel in the input image corresponds to a target based on a correlation between the input image modeling result and the background image modeling result and target templates having different sizes;
determining a location of the target based on the calculated likelihood ratios; and
outputting the determined location of the target.
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Accused Products
Abstract
A target extracting apparatus and method for extracting a target through probability modeling of pixel brightness values in an image, and a recording medium storing a program for performing the method, are disclosed. The method includes extracting a background image from an input image, modeling brightness values of the input image and the background image based on a Gaussian distribution to generate an input image modeling result and a background image modeling result, calculating likelihood ratios for determining whether a pixel in the input image corresponds to a target based on a correlation between the input image modeling result and the background image modeling result and target templates having different sizes; determining a location of the target based on the calculated likelihood ratios; and outputting the determined location of the target.
13 Citations
20 Claims
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1. A method of extracting a target, the method comprising:
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extracting a background image from an input image; modeling brightness values of the input image and the background image based on a Gaussian distribution to generate an input image modeling result and a background image modeling result; calculating likelihood ratios for determining whether a pixel in the input image corresponds to a target based on a correlation between the input image modeling result and the background image modeling result and target templates having different sizes; determining a location of the target based on the calculated likelihood ratios; and outputting the determined location of the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus which extracts a target, the apparatus comprising:
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a background image extractor which extracts a background image from an input image; a Gaussian distribution modeling unit which models brightness values of the input image and the background image based on a Gaussian distribution to generate an input image modeling result and a background image modeling result; a likelihood ratio calculator which calculates likelihood ratios used to determine whether a pixel in the input image corresponds to a target based on a correlation between the input image modeling result and the background image modeling result and target templates having different sizes; and a target location determiner which determines a location of the target based on the calculated likelihood ratios and outputs the determined location of the target. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable recording medium storing a computer-readable program for executing a method of extracting a target, the method including:
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extracting a background image from an input image; modeling brightness values of the input image and the background image based on a Gaussian distribution to generate an input image modeling result and a background image modeling result; calculating likelihood ratios for determining whether a pixel in the input image corresponds to a target based on a correlation between the input image modeling result and the background image modeling result and target templates having different sizes; determining a location of the target based on the calculated likelihood ratios; and outputting the determined location of the target.
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Specification