Mr. Mingming Chen Profile

Mingming Chen

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Proceedings Article | 26 October 2013 Paper

An on-line learning tracking of non-rigid target combining multiple-instance boosting and level set

Mingming Chen, Jingju Cai

Proceedings Volume 8918, 891802 (2013) https://doi.org/10.1117/12.2031170

KEYWORDS: Detection and tracking algorithms, Optical tracking, Image segmentation, Image processing, Automatic target recognition, Expectation maximization algorithms, Lithium, Visual optics, Electronics, Sensors

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Visual tracking algorithms based on online boosting generally use a rectangular bounding box to represent the position of the target, while actually the shape of the target is always irregular. This will cause the classifier to learn the features of the non-target parts in the rectangle region, thereby the performance of the classifier is reduced, and drift would happen. To avoid the limitations of the bounding-box, we propose a novel tracking-by-detection algorithm involving the level set segmentation, which ensures the classifier only learn the features of the real target area in the tracking box. Because the shape of the target only changes a little between two adjacent frames and the current level set algorithm can avoid the re-initialization of the signed distance function, it only takes a few iterations to converge to the position of the target contour in the next frame. We also make some improvement on the level set energy function so that the zero level set would have less possible to converge to the false contour. In addition, we use gradient boost to improve the original multi-instance learning (MIL) algorithm like the WMILtracker, which greatly speed up the tracker. Our algorithm outperforms the original MILtracker both on speed and precision. Compared with the WMILtracker, our algorithm runs at a almost same speed, but we can avoid the drift caused by background learning, so the precision is better.

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