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Digital tildes ("~") may convey more: analyzing innovative uses of tildes in Chinese WeChat messages

Language and Semiotic Studies 2023年第3期9卷 443-460页

作者： Huan Xu Dengshan Xia Beijing Foreign Studies University Haidian District Beijing China

Innovative uses of punctuation in online communication have become increasingly visible in research and public awareness since the 2000s,whereas studies on the innovative use of tildes("~")in digital use remain scarce.Drawing on a data set of 543 Chinese WeChat messages with sentence-final tildes,this article investigates the uses and functions of innovative tildes in online communication using quantitative data and follow-up interviews.The findings suggest that:(1)The innovative tildes are deployed in messages implying sounds and performing speech acts in online communication,and they are more frequently used in speech acts(e.g.,expressives and directives in particular).(2)The innovative tildes convey sound extension,ie.,to compensate for the loss of audio information in online communication and reproduce elongated sounds;pragmatic function,i.e.,to enhance or mitigate the illocutionary forces of speech acts;and entertaining function,i.e.,to make messages informal,vivid,joyful,and interesting.(3)The innovative tildes are pragmalicalized as a result of their semiotic features and politeness motivation of messengers for maintaining rapport and achieving successful online communication.

关键词： innovative uses of tildes online communication politeness pragmatic-alization WeChat messages

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Real-time face view correction for front-facing cameras

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Computational Visual Media 2021年第4期7卷 437-452页

作者： Yudong Guo Juyong Zhang Yihua Chen Hongrui Cai Zhangjin Huang Bailin Deng University of Science and Technology of China Hefei 230026China School of Computer Science and Informatics Cardiff UniversityCardiffWalesUK

Face views are particularly important in person-to-person communication.Differenes between the camera location and the face orientation can result in undesirable facial appearances of the participants during video conferencing.This phenomenon is particularly noticeable when using devices where the frontfacing camera is placed in unconventional locations such as below the display or within the keyboard.In this paper,we take a video stream from a single RGB camera as input,and generate a video stream that emulates the view from a virtual camera at a designated location.The most challenging issue in this problem is that the corrected view often needs out-of-plane head rotations.To address this challenge,we reconstruct the 3D face shape and re-render it into synthesized frames according to the virtual camera location.To output the corrected video stream with natural appearance in real time,we propose several novel techniques including accurate eyebrow reconstruction,high-quality blending between the corrected face image and background,and template-based 3D reconstruction of glasses.Our system works well for different lighting conditions and skin tones,and can handle users wearing glasses.Extensive experiments and user studies demonstrate that our method provides high-quality results.

关键词： face view correction 3D face reconstruction deep learning online communication

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