计算机视觉中运动行为分析就是在不需要人为干预的情况下,综合利用计算机视觉、模式识别、图像处理、人工智能等诸多方面的知识和技术对摄像机拍录的图像序列进行自动分析,实现动态场景中的人体定位、跟踪和识别,并在此基础上分析和判断人的行为,其最终目标是通过对行为特征数据的分析来获取行为的语义描述与理解。运动人体行为分析在智能视频监控、高级人机交互、视频会议、基于行为的视频检索以及医疗诊断等方面有着广泛的应用前景和潜在的商业价值,是近年来计算机视觉领域最活跃的研究方向之一。 它包含视频中运动人体的自动检测、行为特征提取以及行为理解和描述等,属于图像分析和理解的范畴。从技术角度讲,人体行为分析和识别的研究内容相当丰富,涉及到图像处理、计算机视觉、模式识别、人工智能、形态学等学科知识。

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Emotional expressions are the behaviors that communicate our emotional state or attitude to others. They are expressed through verbal and non-verbal communication. Complex human behavior can be understood by studying physical features from multiple modalities; mainly facial, vocal and physical gestures. Recently, spontaneous multi-modal emotion recognition has been extensively studied for human behavior analysis. In this paper, we propose a new deep learning-based approach for audio-visual emotion recognition. Our approach leverages recent advances in deep learning like knowledge distillation and high-performing deep architectures. The deep feature representations of the audio and visual modalities are fused based on a model-level fusion strategy. A recurrent neural network is then used to capture the temporal dynamics. Our proposed approach substantially outperforms state-of-the-art approaches in predicting valence on the RECOLA dataset. Moreover, our proposed visual facial expression feature extraction network outperforms state-of-the-art results on the AffectNet and Google Facial Expression Comparison datasets.

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