Method and apparatus for generating a reference image from an image sequence
First Claim
Patent Images
1. Apparatus for generating and updating a reference image from a sequence of images representing a scene comprising:
- a sample mask selector for generating, in response to a first image and a second image in said sequence of images, a sample mask for controlling reference image generation; and
a reference updater for updating select portions of a reference image in response to said first image and said sample mask, where said sample mask defines the portions of said reference image to be updated.
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Abstract
A locally-adaptive method and apparatus for constructing a reference image containing only the background from an image sequence containing moving or temporarily-stationary objects. Specifically, the apparatus contains a sample mask selector and a reference updater. The selector generates a mask which is used by the updated to perform updating of a reference image using only portions of the input image that contain background imagery. The updater enhances the masking function using a statistical analysis to avoid updating pixels using non-background imagery.
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Citations
7 Claims
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1. Apparatus for generating and updating a reference image from a sequence of images representing a scene comprising:
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a sample mask selector for generating, in response to a first image and a second image in said sequence of images, a sample mask for controlling reference image generation; and a reference updater for updating select portions of a reference image in response to said first image and said sample mask, where said sample mask defines the portions of said reference image to be updated. - View Dependent Claims (2)
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3. A method of generating and updating a reference image from a sequence of images representing a scene comprising the steps of:
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generating, in response to a first image and a second image in said sequence of images, a sample mask for controlling reference image generation; and updating select portions of a reference image in response to said first image and said sample mask, where said sample mask defines the portions of said reference image to be updated. - View Dependent Claims (4, 5, 6, 7)
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Specification