Active contour tracing method based on superpixel

An active contour and contour tracking technology, applied in the field of computer vision, can solve the problems of contour initialization sensitivity, inability to deal with topology changes, unstable numerical solutions, etc., and achieve the effect of real and reliable distance measurement

CN103366382AInactive Publication Date: 2013-10-23UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-10-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an active contour tracing method based on superpixel. The method comprises the following steps of carrying out the superpixel segmentation on a training image to obtain a training sample pool of a target and a background, adopting a measuring learning method to obtain a distance measuring projection matrix according to a training sample, establishing a judgment-type appearance model, carrying out the superpiexel segmentation on each frame of test image of a sequence image, obtaining a confidence diagram corresponding to the test image according to the established judgment-type appearance model, obtaining a speed field of the test image, substituting the speed field into an evolution equation of a level set method, and obtaining a contour trace result of the test image. Compared with the prior art, the contour evolution efficiency of each frame of test image can be improved, and the tracing accuracy and tracing efficiency of the sequence image can be improved.
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Description

technical field

[0001] The invention belongs to the technical field of computer vision, and more specifically relates to an active contour tracking method based on superpixels. Background technique

[0002] The target tracking in the visual surveillance scene is to detect, locate and track the moving target by processing the video image sequence captured by the camera. Since the contour features can well describe the shape information of the target, and these shape information facilitates the understanding and recognition of the subsequent high-level behavior, and compared with the static camera, the active contour tracking method is more suitable for the detection and positioning of the moving camera. and track sports goals. Therefore, the active contour tracking method has gradually become the frontier and hot spot of current academic research in recent years. In the top international journals TPAMI, IJCV and conferences ICCV and CVPR in the field of computer vision and ...

Examples

Embodiment

[0081] In order to implement the specific idea of ​​the present invention, comparative simulation experiments are done on multiple video sequences. For the convenience of quantitative comparison, the tracking accuracy is defined To reflect the real calibration data C gt with trace result C t degree of similarity.

[0082] Figure 4 It is an example diagram comparing the number of iterations of the evolution equation between the present invention and the prior art. Such as image 3 As shown, the present invention is based on the superpixel active contour tracking method, namely based on superpixel and considering measure learning (SP-based with DML) and superpixel not considering measure learning (SP-based without DML), pixel-based method ( Pixel-based) using the same video sequence for comparative simulation. It can be seen that the superpixel-based active contour tracking method proposed by the present invention can converge faster.

[0083] Figure 5 It is a compari...