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Online Target Contour Tracking Method Based on Level Set

A target contour and contour tracking technology, which is applied in the field of online target contour tracking based on level set, can solve problems such as unsustainable tracking, drift, and tracking failure, and achieve the effect of continuous tracking and high-precision target contour tracking

Inactive Publication Date: 2018-08-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, online active contour tracking is prone to drift due to noise interference. Once lost, it will lead to tracking failure and cannot continue tracking

Method used

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  • Online Target Contour Tracking Method Based on Level Set
  • Online Target Contour Tracking Method Based on Level Set
  • Online Target Contour Tracking Method Based on Level Set

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Experimental program
Comparison scheme
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Embodiment

[0100] In order to illustrate the technical effect of the present invention, adopt the present invention to carry out experimental verification to actual video image, the comparative method that adopts comprises the level set (levelset) method based on discriminant type appearance model and widely popular GVF+Snake active contour model, Tracking accuracy is used to measure their tracking performance. Define the tracking accuracy Tscore as:

[0101]

[0102] in, is the tracking result of the image in the current tth frame, C grd as the reference (true) contour.

[0103] The present invention and two comparison methods are used to track the target contour of five video sequences respectively. The five video sequences include: toy sequence, the tracking target is a red doll; highway sequence, the tracking target is a red car; stapler sequence, the tracking target is a stapler; nemo sequence, the tracking target is a swimming fish; lemming sequence, the tracking target A dol...

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Abstract

The invention discloses an online target contour tracking method based on level set. First, the initial contour is manually calibrated in the first frame of target image, the level set contour tracking flag is set, and a discriminant classifier and a level set function are initialized according to the initial target contour. and the target detector; decide whether to perform level set contour tracking based on the discriminative appearance model according to whether the level set contour tracking flag is effective; use the target detector to detect the target; judge the target contour tracking result according to the contour result and the target result, Update the initial target contour; then update the discriminant classifier, level set function and target detector according to the target contour tracking results, and then perform target contour tracking on the next frame of image. The invention adopts the level set contour tracking based on the discriminant appearance model and the target detection to jointly track the target contour, thereby realizing high-precision and continuous target contour tracking.

Description

technical field [0001] The invention belongs to the technical field of image target tracking, and more specifically relates to an online target contour tracking method based on a level set. Background technique [0002] Video tracking has now been widely used in various occasions and fields, and has brought immeasurable impact on people's daily life and social development in many aspects. Among them, contour tracking plays a very important role. For example, in medicine, multi-cell contour tracking has made important contributions to the study of cell division changes. For the regeneration and evolution of cell life, it is very important to carry out long-term analysis and tracking of its contour accuracy, which will also play a very important role in the future human civilization; another example is to conduct behavior analysis by tracking human behavior , which will then be applied in many ways. [0003] In the actual process of tracking, there will be various moving ob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06T2207/10016G06F18/2411
Inventor 周雪何建石竟邹见效徐红兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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