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Active target contour tracking method with motion information combined

A technology of active contour and motion information, applied in the field of computer vision, it can solve the problems of complex calculation, high requirements for initial contour, and time-consuming

Active Publication Date: 2017-10-20
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

The Snake model has a good ability to track the target contour of a specific area, and is often used to segment medical images, but it has the following disadvantages: the capture range of the image boundary is small, the initial contour is very high, and it is very sensitive to parameter settings. , cannot flexibly handle topological changes, and is prone to erroneously converge to local extremum points
The traditional level set method initializes the level set function as a signed distance function, and needs to be reinitialized every once in a while, which leads to complex calculation and takes a lot of time

Method used

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  • Active target contour tracking method with motion information combined
  • Active target contour tracking method with motion information combined
  • Active target contour tracking method with motion information combined

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Embodiment Construction

[0085] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0086] The present invention designs a target active contour tracking method combining motion information and appearance features under the framework of level set. In the appearance feature modeling part, the color features and texture features of the target and background are extracted with superpixels as the basic unit. Considering that there are multiple appearance modes (multiple colors or textures) in the target or background in the actual scene, two It is difficult for classifiers to obtain correct classification results. This invention proposes a confidence map calcu...

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Abstract

The invention discloses an active target contour tracking method with motion information combined. With a super pixel as a basic element, apparent characteristics and motion characteristics of a target and a background area are modeled respectively, a decision tree algorithm is adopted to fuse the two, dependence on the apparent characteristics by the traditional active target contour tracking method is overcome, and when the target and the background have similar characteristics such as the color and the texture, the tracking precision is enhanced obviously in a scene with an apparent relative motion, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of computer vision, and more specifically relates to a target active contour tracking method combined with motion information. Background technique [0002] In the field of computer vision, target active tracking technology occupies a very important position. It obtains the trajectory of the position of the target of interest in the continuous sequence of images over time by processing the sequence of images in the video. The application of target active tracking technology is very extensive, such as military guidance, video surveillance, intelligent transportation, human-computer interaction, public safety and so on. The expression forms of target active tracking include rectangle, ellipse, outline, etc. The form of outline can well express the change information of target shape and size, and it provides convenience for the recognition and understanding of high-level behavior. Therefore, target active outli...

Claims

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Application Information

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IPC IPC(8): G06K9/46G06K9/62
CPCG06V10/462G06V10/44G06F18/2411G06F18/253
Inventor 周雪冯媛媛邹见效徐红兵
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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