Apparatus and method for detecting foreground in image
AssigneesSamsung Electronics Co., Ltd., Seoul National University R&Db Foundation
InventorsKi Min Yun, Jin Young Choi, Jong In Lim
Life of this patent
Estimating the term…
Abstract
An apparatus and method for detecting a foreground in an image is provided, and the foreground detecting apparatus includes a context information estimator configured to estimate context information on a scene from an image frame of the image, a background model constructor configured to construct a background model of the image frame using the estimated context information, and a foreground detector configured to detect a foreground from the image frame based on the constructed background model.
Claims22
An apparatus for detecting a foreground in an image, the apparatus comprising:
- a memory configured to store instructions;
- and
- a processor configured to execute the instructions to:
- estimate context information, including a foreground speed, on a scene from an image frame of the image;
- construct a background model of the image frame using the estimated context information;
- and
- detect a foreground from the image frame based on the constructed background model,
- wherein the foreground speed is estimated by calculating a speed using an optical flow of the image frame and a previous image frame, and correcting the speed based on a projective transform matrix that represents background motion.
A method of detecting a foreground in an image, the method comprising:
- estimating context information, including a foreground speed, on a scene from an image frame of the image;
- constructing a background model of the image frame using the estimated context information;
- correcting a variance of the constructed background model, dependent on whether a value of a context variable based on the foreground speed is greater than or equal to a block size;
- and
- detecting a foreground from the image frame based on the variance-corrected constructed background model.
A digital device, comprising:
- an antenna;
- a cellular radio configured to transmit and receive data via the antenna according to a cellular communications standard;
- a touch-sensitive display;
- a camera configured to capture an image;
- a memory configured to store instructions;
- and
- a processor configured to execute the instructions to
- receive the image from the camera,
- estimate context information, including an illumination change, on a scene from an image frame of the image,
- construct a background model of the image frame using the estimated context information,
- update a mean of the constructed background model by reflecting the illumination change, dependent on whether a value of a context variable is smaller than a block size, and
- detect a foreground from the image frame based on the constructed background model.
Dependencies are inferred from the claim text.