Beihang University

Beijing Unidraw Vr Technology Researech Institute Co., Ltd

Aimin Hao

Yang Gao

Hongyu Wu

Yanqing Xiao

Xiaohan Zhao

Yongtao Zhao

Jia Zheng

Yu Cong

Shiyu Liang

Hongming Bai

This disclosure relates to an immersive ankle rehabilitation training method and electronic apparatus based on upper limb motion signals. The innovation of this technology lies in that: firstly, this disclosure proposes a hybrid model of Regression LSTM corrected by a sliding window based voting algorithm, which predicts the changing angle of the user's wrist joint through wearable EMG sensors; secondly, this disclosure designs and develops two different VR training scenes for users of dorsiflexion and plantar flexion of foot; during the training, users wear VR headwear displays and EMG monitoring devices, to continuously perform wrist dorsiflexion or wrist palm flexion movements, predict the change in wrist joint angles in real-time through forearm sEMG signals, and map it to the contralateral ankle of the avatar in the virtual scene for rotation.

Immersive ankle rehabilitation training method and electronic apparatus based on upper limb motion signals

The embodiments of the present disclosure disclose subsurface scattering calculation method for translucent material rendering, which relates to the clipping and polynomial fitting of brute-force Monte Carlo photon tracking experimental results to accurately represent the energy attenuation of subsurface scattering in distance. On this basis, an average free path and a single scattering rate are used to determine the relationship of each term in the multinomial fitting formula so as to facilitate the calculation and adjustment of the reflection profile. In the end, through a new real-time importance sampling solution, the outgoing radiation from any point on the object surface is calculated by the Monte Carlo method. This importance sampling solution is also applicable to any other subsurface scattering calculation model. By combining this subsurface scattering calculation result with other results, such as highlight reflection, any translucent material object can be rendered accurately and efficiently.

Subsurface scattering calculation method for translucent material rendering

A vision-haptics fused augmented reality simulator for dental surgical skill training, including a dental simulation training platform constructed based on an artificial head phantom; a dental operation training system based on a haptic feedback device; an observation system based on an augmented reality head-mounted display; generating a virtual dental model by modeling based on CBCT data and scan data of a patient's dental cavity, to construct a virtual dental environment; based on the virtual dental model and feature points obtained through scanning on the artificial head phantom, performing a spatial matching of a virtual dental cavity and a dental model; in a virtual dental surgery simulation method, outputting haptics information and visual information at frequencies of not less than 1000 Hz and 60 Hz, respectively; performing a visual information processing method on grid data; and performing a haptics-vision space calibration method based on information of an operator's head.

Vision-haptics fused augmented reality simulator for dental surgical skill training

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Beijing, China

Aimin Hao