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非特定人手语识别参数训练模型的改进及应用

DOI: 10.3969/j.issn.1006-7043.2009.09.012

Keywords: 区分性训练 DT/HMM 非特定人手语识别 参数训练模型 h参数 h准则 discriminative training discriminative training improved HMM model (DT/HMM) signer-independent sign language recognition (SISLR) parameters training model h parameter h criterion.

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Abstract:

在手语识别研究中,非特定人手语识别参数训练的样本缺乏影响了非特定人手语识别的识别率.区分性训练可以很好的弥补由于训练样本的缺乏对识别系统所造成的影响,能够提高非特定人手语识别的识别率.对区分性训练(DT)所改进的HMM参数训练模型(DT/HMM)做了全新的推导,获得了与HMM相一致齐全的DT/HMM的参数模型.在特定人识别系统上应用可区分性训练的h准则获取了h参数,将该齐全的DT/HMM的参数训练模型和h参数,应用于大词汇量的非特定人手语识别当中,加入主观经验后的非注册易混词集EXP 与MLE和EBW的非注册易混词集相比,平均识别率分别提高了10.65%和9.55%.

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