Intelligent Support System for Learning Sign Language with Video

1.一种手语单词关键特征的提取与建模方法(1)手语视频中的特征提取我们提出了一种通过对手语说话者上的彩色指套、拇指套和手腕带进行颜色跟踪来分析手部动作和手指形状的方法。该方法利用特征空间法提取主成分流量向量作为关键特征。然后，利用傅立叶描述子消除流矢量中的谐波含量。基于自信息的特征建模与关键特征提取我们用运动音素和指形音素来表达手势特征。其次，提出了一种基于手语特征库中每个特征自身信息提取关键特征的方法。2.特征匹配方法根据错误的严重程度将手语学习者的运动错误分为两个级别，并提出了一种基于路径搜索的每个级别的特征匹配方法。我们的方法使用了扩展的标准运动特征，其中包括轻微变形的误差特征。由于采用这种方法，检测系统同时提取运动误差并确定其大小，以实现误差的实时反馈。3.倾斜控制方法根据特征重要性和人类记忆过程，提出了一种分阶段学习关键特征的记忆策略。通过对手语单词的学习实验，证明了该方法对手语单词的长期记忆是有效的。

1.A Method for Extraction and Modeling of Key Features in Sign Language Words(1)Feature Extraction from Sign Language VideoWe have developed a method for analyzing hand motions and finger shapes by color-tracking of colored fingerstalls, thumbstalls and wrist bands that are attached to a sign language speaker. The method extracts principal component flow vectors as key features using eigenspace method. Next, our method cancels harmonic contents of flow vectors by using fourier descriptor. In addition, the method can correct image distortion occurred by filming with wide-range lens.(2)Feature Modeling and Key Feature Extraction Based on Self InformationWe expressed sign features by motion phonemes and finger shape phonemes. Next, we have proposed a method that extracts key features based on self information of each feature within sign feature database.2.Feature Matching MethodWe classify motion errors of sign language learners into two levels in terms of the error seriousness, and propose an feature matching method for each level by using path-searching. Our method employs extended standard motion features that include error features deformed slightly. Owing to the employment, our detection system extracts motion errors and determines their level simultaneously for realizing real-time error feedback.3.Leaning Control MethodWe propose a memory strategy by phased learning of key features in terms of feature importance and human memory processes. By an experiment of learning sign words, we show that our method is effective in long-term memorizing of the words.