MorphFace: A Hybrid Morphable Face for a Robopatient
MorphFace: A Hybrid Morphable Face for a Robopatient
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DOI：
10.1109/lra.2020.3048670
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发表时间：
2021-04-01
影响因子：
5.2
通讯作者：
Nanayakkara, Thrishantha
中科院分区：
文献类型：
--
作者：
Lalitharatne, Thilina Dulantha;Tan, Yongxuan;Nanayakkara, Thrishantha
医生在身体检查时，利用病人脸上的疼痛表情来调节他们的触诊方法。训练患者解读不同性别和种族的面部表情仍然是一个挑战，新手需要很长时间才能通过经验学习。这封信介绍了MorphFace：一个可控的3D物理-虚拟混合人脸来代表来自不同种族-性别背景的患者的疼痛表情。这也是让实习医生了解患者性别和种族多样性的一个中间步骤。我们从芝加哥人脸数据库中提取了四个主成分，设计了一个通过肌腱控制的四自由度（DoF）物理人脸，以跨越性别和种族之间85%的面部变化。皮肤颜色、皮肤纹理和面部表情等细节由虚拟模型合成，并通过前置LED投影仪投影到3D物理面部上，以获得混合可控的患者面部模拟器。一项用户研究显示，观察者和MorphFace之间的种族差异导致MorphFace呈现的相同疼痛水平的感知疼痛强度不同。这突出了MorphFace作为可控混合模拟器的价值，以量化医生培训期间的感知差异。
Physicians use pain expressions shown in a patient's face to regulate their palpation methods during physical examination. Training to interpret patients' facial expressions with different genders and ethnicities still remains a challenge, taking novices a long time to learn through experience. This letter presents MorphFace: a controllable 3D physical-virtual hybrid face to represent pain expressions of patients from different ethnicity-gender backgrounds. It is also an intermediate step to expose trainee physicians to the gender and ethnic diversity of patients. We extracted four principal components from the Chicago Face Database to design a four degrees of freedom (DoF) physical face controlled via tendons to span similar to 85% of facial variations among gender and ethnicity. Details such as skin colour, skin texture, and facial expressions are synthesized by a virtual model and projected onto the 3D physical face via a front-mounted LED projector to obtain a hybrid controllable patient face simulator. A user study revealed that certain differences in ethnicity between the observer and the MorphFace lead to different perceived pain intensity for the same pain level rendered by the MorphFace. This highlights the value of having MorphFace as a controllable hybrid simulator to quantify perceptual differences during physician training.