Method and apparatus for generating a reference image from an image sequence
AssigneeSarnoff Corporation
InventorLambert Ernest Wixson
Life of this patent
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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.
Claims7
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.
A method of generating and updating a reference image from a sequence of images representing a scene comprising the steps of:
- 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.
Dependencies are inferred from the claim text.