判别分析字典在行为识别中的算法研究

Research on Discriminative Analysis Dictionary Algorithm on Human Action Recognition

  • 摘要: 近年来,字典学习已成功运用到模式识别领域中,但是作为字典学习里的重要分支,分析字典却极少能得到应用,主要原因是分析字典的判别力较弱。该文提出了一种新的具有鲁棒性和判别性的分析字典学习法,该字典学习法从带噪数据中寻求数据的低秩表达,并联合Fisher准则从恢复出的干净数据中学习分析字典,由于引入了监督学习的机制,因此增强了字典的判别特性。最后将该算法应用于人体行为识别任务中,通过实验验证得出,相比于其他经典的字典学习方法,该方法在行为识别数据集上取得了较好的分类精度。

     

    Abstract: Recently, dictionary learning (DL) has been applied to various pattern recognition tasks successfully, analysis dictionary learning, however as an important branch of dictionary learning, has not been fully exploited due to its poor discriminability. In this paper, a novel robust and discriminative analysis dictionary learning method is proposed, which specially seeks low rank representation from noisy data and learn a discriminative dictionary from the recovered clean data by incorporating with the Fisher criterion. The discriminability of dictionary is improved by introducing the supervised mechanism. At last, the task of human action recognition is conducted by applying the proposed method. Experiments on several human action recognition datasets show that the proposed method outperforms other classical synthesis dictionary methods.

     

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