Realistic Facial Expression of Virtual Human Based on Color, Sweat, and Tears Effects
Realistic Facial Expression of Virtual Human Based on Color, Sweat, and Tears Effects
复制标题
基于颜色、汗水和眼泪效果的虚拟人的逼真面部表情
作者：
M. H. Alkawaz;A. Basori;D. Mohamad;F. Mohamed
生成极端的外观，如害怕等待出汗，而高兴适合流泪（哭泣）和脸红（愤怒和快乐）是实现高质量面部动画的关键问题。汗水、眼泪和颜色的效果被集成到单个动画模型中，以创建3D化身的逼真面部表情。肌肉的物理特性，情绪，或与出汗和眼泪引发剂的流体特性被纳入。面部动作编码系统的动作单元（AU）与自主AU合并，以创建包括悲伤，愤怒与脸红，快乐与脸红和恐惧的表情。使用粒子系统和光滑粒子流体动力学（SPH）方法模拟汗液和眼泪等流体效果，并结合面部动画技术生成复杂的面部表情。使用脉搏血氧仪系统和3D皮肤分析仪测量面部皮肤颜色外观的氧合效果。结果表明，虚拟人的面部表情增强模拟实际出汗和眼泪模拟所有极端的表情。该方法对人脸动画产业、游戏以及计算机图形学的发展具有一定的参考价值。
Generating extreme appearances such as scared awaiting sweating while happy fit for tears (cry) and blushing (anger and happiness) is the key issue in achieving the high quality facial animation. The effects of sweat, tears, and colors are integrated into a single animation model to create realistic facial expressions of 3D avatar. The physical properties of muscles, emotions, or the fluid properties with sweating and tears initiators are incorporated. The action units (AUs) of facial action coding system are merged with autonomous AUs to create expressions including sadness, anger with blushing, happiness with blushing, and fear. Fluid effects such as sweat and tears are simulated using the particle system and smoothed-particle hydrodynamics (SPH) methods which are combined with facial animation technique to produce complex facial expressions. The effects of oxygenation of the facial skin color appearance are measured using the pulse oximeter system and the 3D skin analyzer. The result shows that virtual human facial expression is enhanced by mimicking actual sweating and tears simulations for all extreme expressions. The proposed method has contribution towards the development of facial animation industry and game as well as computer graphics.