Personalized Exaggeration Of Facial Image Features According To Social Psychology Of Face Perception

Facial image feature exaggeration is a typical technique of artistic expression,which is widely used in artistic works of human face,especially in applications of instant Internet communication.Existing methods of facial image feature exaggeration focus on local feature exaggeration,while ignoring the effect of particular global combinations of facial physical features in the process of face perception,which leads to variation of impressions of a face between before and after exaggeration.So in order to improve shortages of previous methods,we build multi-level feature models for different types of faces,based on researches in the field of social psychology of face perception.Then such models are selected to apply to objective facial images to emphasize or modify the impression of human face in images and realize personality trait exaggeration.Main contributions of our work are as following:(1)According to social psychology of face perception,propose a Personality Trait Model(or PTM for short)for facial images based on multi-level features.Abstract level of PTM includes labels of personality traits such as amiable,mean,cute and so on,such labels are generated by perceptual statistical survey.Concrete level of PTM contains multi-level physical features.Through a training process,PTM associates personality traits with particular combinations of facial physical features.So with these models,faces can be exaggerated on personality traits and people's impressions of them can be emphasized or modified.(2)Present a new method of facial image feature exaggeration which using oth shape feature exaggeration and texture feature exaggeration.Previous ethods focus on deformation styles of faces.That means they only use hape feature exaggeration.But the concrete level features of PTM in this aper are composed by shape feature and texture feature.So our method escribes the appearance of a face more comprehensive and enhances xaggeration effect.(3)Bring out a technical solution of facial image feature exaggeration based n PTM.And it is comprised of two main phases,the training phase and he application phase.In training phase,PTMs are extracted from sample mages,which represent different exaggeration styles.This phase is omprised of position feature extraction,distance feature extraction, lobal texture feature extraction and local texture feature extraction.In pplication phase,original face is exaggerated using chosen PTM.This phase is comprised of position feature exaggeration,distance feature exaggeration,global texture feature exaggeration and local texture feature exaggeration.(4)Experimental results and related perceptual verification experiment demonstrate the effectiveness of our method.On the one hand,output images are provided which are personalized exaggerated using PTM.On the other hand,a perceptual verification experiment is conducted.By quantitatively analyzing the change of impressions of test images,we can reach the conclusion that our method can emphasize a certain personality trait.