CAJ | 학술논문

脸部表情的变化细节(例如皱纹)是很重要的视觉线索,但是它们难以建模与合成.这是由于人们说话和作表情时,脸部纹理也在动态地改变.与传统的纹理映射方法不同,提出一种根据脸部特征点运动来生成脸部动态纹理的新方法.基于形状和外观在表情脸部图像上高度相关这个观察,设计建立了从形状到外观的映射关系.这个映射被称作"形状外观的关联映射(shape-appearance dependence mapping,简称SADM)".实验结果表明用,SADM合成出的人脸与真实的人脸十分近似.提出的SADM方法可以集成到基于线框模型的人头模型中产生真实的动画效果,也可以应用于基于模型的视频编码来进一步节省传输带宽.
검부표정적변화세절(례여추문)시흔중요적시각선색,단시타문난이건모여합성.저시유우인문설화화작표정시,검부문리야재동태지개변.여전통적문리영사방법불동,제출일충근거검부특정점운동래생성검부동태문리적신방법.기우형상화외관재표정검부도상상고도상관저개관찰,설계건립료종형상도외관적영사관계.저개영사피칭작"형상외관적관련영사(shape-appearance dependence mapping,간칭SADM)".실험결과표명용,SADM합성출적인검여진실적인검십분근사.제출적SADM방법가이집성도기우선광모형적인두모형중산생진실적동화효과,야가이응용우기우모형적시빈편마래진일보절성전수대관.
The subtle details on an expressional face,such as creases and furrows,are very important visual cues,but they are difficult to model and synthesize as they vary dynamically from one frame to another while people speak and make expression.A novel strategy,which is different from the traditional texture mapping methods,is proposed for generating such a kind of dynamic facial textures according to the motion of facial feature points.Based on the observation that shape and appearance on face images are highly correlated,a mapping is designed to transfer one image to the other.The mapping is called SADM(shape-appearance dependence mapping).The experimental results show that the synthesized faces with SADM are very close to the real ones.The proposed SADM strategy can be integrated into a wire-frame based head model to generate the realistic animation effects,or applied to a model-based video coding to produce more efficient bit-rates.