It is a challenging issue to deal with kinds of appearance variations in visual tracking. Existing tracking algorithms build appearance\nmodels upon target templates. Those models are not robust to significant appearance variations due to factors such as illumination\nvariations, partial occlusions, and scale variation. In this paper, we propose a robust tracking algorithm with a learnt dictionary to\nrepresent target candidates. With the learnt dictionary, a target candidate is represented with a linear combination of dictionary\natoms. The discriminative information in learning samples is exploited. In the meantime, the learning processing of dictionaries\ncan learn appearance variations. Based on the learnt dictionary, we can get a more stable representation for target candidates.\nAdditionally, the observation likelihood is evaluated based on both the reconstruct error and dictionary coefficients with ...1\nconstraint. Comprehensive experiments demonstrate the superiority of the proposed tracking algorithm to some state-of-the-art\ntracking algorithms.
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