On large appearance change in visual tracking
On large appearance change in visual tracking
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视觉跟踪中的大外观变化
DOI：
10.1007/s00521-019-04094-z
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发表时间：
2019-03
影响因子：
6
通讯作者：
Wei-shi Zheng
中科院分区：
文献类型：
--
作者：
Yun Liang;Mei-hua Wang;Yan-wen Guo;Wei-shi Zheng
This paper concerns on overcoming the challenges caused by drastic appearance change in visual tracking, especially the long-term appearance variation due to occlusion or large object deformation. We aim to build a long-term appearance model for robust tracking against large appearance change in two new respects: using historical and distinguishing cues to model target representation and extracting effective spatial objectness features from each frame to distinguish outliers. For the first purpose, an adaptive superpixel-based appearance model is formulated. Different from previous superpixel-based trackers, a complementary feature set is defined for the update model to preserve the features of those temporally disappeared object parts especially under occlusion and large deformation. For the second purpose, three new spatial objectness cues specially designed for tracking are defined, including surrounding comparison, edge density change and weighted superpixel straddling. With these spatial objectness cues, our method facilitates target object localization and ensures the target has similar edge distribution between adjacent frames. These cues greatly improve the ability of our method to distinguish the target from its surrounding background. The adaptive appearance model retains valuable features of historical results, and the spatial objectness cues are extracted from the current frame, and thus they are finally combined to complement with each other to solve large appearance changes. The extensive evaluations on the CVPR 2013 online object tracking benchmark and VOT 2014 datasets demonstrate the effectiveness of our method as compared with related trackers.
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