Brief Introduction to Continuous Sign Language Recognition - PowerPoint PPT Presentation

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Brief Introduction to Continuous Sign Language Recognition 2019.1.19 Introduction What does a continuous sign language recognition (SLR) system do? word vocabulary: apple, sun, today, catch, you today is SLR system

Brief Introduction to Continuous Sign Language Recognition 魏承承 2019.1.19
Introduction  What does a continuous sign language recognition (SLR) system do? word vocabulary: apple, sun, today, catch, you …… today is SLR system … sunny sentence sign video 2
Introduction  Evaluation on Continuous SLR  Word Error Rate (WER) For example, prediction: I (have) a cat that named Jerry. groundtruth: I have a cat named Tom.   1 1 1=0.5 Calculate the WER: 6 3
Introduction  Continuous SLR is weakly-supervised  解决 Continuous SLR 问题的主流思路  受语音识别领域启发：对每一帧识别，合并结果  Connectionist Temporal Classification ( CTC )  CNN-RNN-CTC framework  受机器翻译领域启发：从特征序列映射到文本序列  Encoder-Decoder framework 4
Introduction  CTC: 逐一识别，再合并 5 Graves A, Fernández S, Gomez F, et al. Connectionist temporal classification: labelling unsegmented sequence data with recurrent neural networks. ICML 2006
Recurrent Convolutional Neural Networks for Continuous Sign Language Recognition by Staged Optimization [CVPR 2017] Framework : Spatio-temporal CNN - BLSTM - CTC 6
Recurrent Convolutional Neural Networks for Continuous Sign Language Recognition by Staged Optimization [CVPR 2017]  Step1: end-to-end learning Conv1D: 沿时间维度卷积 d × N (K+1) × N 7
Recurrent Convolutional Neural Networks for Continuous Sign Language Recognition by Staged Optimization [CVPR 2017]  Step2: Feature learning with alignment proposal  alignment proposal: output of BLSTM  to finetune the spatio-temporal feature extractor 8
Recurrent Convolutional Neural Networks for Continuous Sign Language Recognition by Staged Optimization [CVPR 2017]  Step3: Sequence learning from representations 9
Recurrent Convolutional Neural Networks for Continuous Sign Language Recognition by Staged Optimization [CVPR 2017]  Experimental results 10
Recurrent Convolutional Neural Networks for Continuous Sign Language Recognition by Staged Optimization [CVPR 2017]  Comparisons 11
Recurrent Convolutional Neural Networks for Continuous Sign Language Recognition by Staged Optimization [CVPR 2017]  Motivated by this paper…  alignment proposal: probability distribution -> argmax-> word  a staged optimization -> more staged optimization  …… 12
Connectionist Temporal Fusion for Sign Language Translation [MM2019] 13
Connectionist Temporal Fusion for Sign Language Translation [MM2019]  Temporal COV 14
Connectionist Temporal Fusion for Sign Language Translation [MM2019]  Optimization  Decoding  argmax-> delete blank -> delete continuous repetitions 15
Connectionist Temporal Fusion for Sign Language Translation [MM2019]  experimental result 16
Connectionist Temporal Fusion for Sign Language Translation [MM2019]  experimental result 17
Connectionist Temporal Fusion for Sign Language Translation [MM2019]  Comparisons 18
The end Thank you

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