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Mode removal for improved multi-modal background subtraction

A pattern, matching pattern technology, applied in character and pattern recognition, parts of color TV, parts of TV system, etc.

Active Publication Date: 2013-02-06
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In all cases, however, there is a trade-off between the speed of being suitable for semantically as a changing appearance to the background and allowing the semantically as appearance of foreground objects

Method used

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  • Mode removal for improved multi-modal background subtraction
  • Mode removal for improved multi-modal background subtraction
  • Mode removal for improved multi-modal background subtraction

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Experimental program
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Embodiment Construction

[0029] Where steps and / or features with the same number are referenced in any one or more figures, those steps and / or features have the same function or operation for the purposes of this description unless an intention to the contrary appears.

[0030]The present invention provides a method and system for maintaining a scene model associated with a scene depicted in a sequence of images. The method works by selectively removing from the scene model those elements that might otherwise have side effects. In particular, the method is adapted to remove from the visual element model those pattern models corresponding to the background when those pattern models correspond to the background match those of the input visual element.

[0031] The present disclosure provides a method of updating a visual element model of a scene model. A scene model is associated with the scene captured in the image sequence. The visual element model includes a collection of pattern models for visual ...

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Abstract

Disclosed herein are a method and system for updating a visual element model (240) of a scene model (230) associated with a scene captured in an image sequence, the visual element model (240) including a set of mode models (260, 270) for a visual element corresponding to a location of the scene. The method receives an incoming visual element 5 (220) of a current frame (210) of the image sequence and, for each mode model (260, 270) in the visual element model (240), classifies the respective mode model (260, 270) as one of a matching mode model and a distant mode model, dependent upon a comparison between an appearance of the incoming visual element (220) and a set of visual characteristics of the respective mode model (260, 270). The method removes a distant mode model from the o visual element model (240), based upon a first temporal characteristic of a matching mode model exceeding a maturity threshold and a second temporal characteristic of the distant mode model being below a stability threshold.

Description

technical field [0001] The present disclosure relates to background removal for foreground detection in images, and in particular, to the maintenance of multi-appearance background models for image sequences. Background technique [0002] A video is a sequence of images, which may also be called a video sequence or image sequence. Images are also called frames. The terms "frame" and "image" are used interchangeably throughout this specification to describe a single image in a sequence of images. Images are constructed of visual elements such as pixels, or of 8×8 DCT (Discrete Cosine Transform) blocks, as used in JPEG images. [0003] Scene modeling, also known as background modeling, involves modeling the visual content of a scene based on a sequence of images describing the scene. Scene modeling allows video analytics systems to differentiate between transient foreground objects and non-transient backgrounds through background differentiation operations. [0004] One ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14
CPCH04N19/00278G06T11/60H04N19/004G06T2207/20081H04N19/0003G06T7/2053G06T7/0079H04N5/14G06K9/3241H04N19/176H04N19/107H04N19/23G06T7/254G06V10/255
Inventor P·J·帕库洛斯基A·K·谷帕塔
Owner CANON KK