Effects of orthognathic surgery on facial expression recognition

正颌手术对面部表情识别的影响

• 批准号: 12671991
• 负责人: TERADA Kazuto
• 金额: $ 2.18万
• 依托单位: NIIGATA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671991/
• 关键词: Orthognathic surgery; Facial expression; Expression recognition; Simulation; Computer graphics; Averaged face; シミュレーション

The purpose of the present study was to investigate the effects of orthognathic surgery on facial expressions by using a special computer system.A facial expression is defined as a movement of grid points in a generic three dimensional face model. A personal frontal face image was manually adjusted to a generic model. Facial expressions of a personal facial model could be produced according to Action Units on Facial Action Coding System. Six averaged facial images were made of three groups with consisted of facial photos of pre and post treatment. One group was treated for mandibular protrusion, the second for maxillary protrusion and the third for crowding. Each group was consisted of 5 female patients. Six expressions (Surprise, Fear, Disgust, Anger, Happiness and Sadness) were produced from the averaged facial image before and after orthodontic treatment. Ninety-nine Japanese subjects and forty Chinese subjects had their expressions estimated.Happy, surprise, fear, disgust and sad faces produced from the averaged face ori the post orthognathic surgery were expressed in the deeper way than ones produced from pre orthognathic surgery. Happy face produced from the post treatment of the maxillary protrusion was expressed in a deeper way than the other same one. Fear, disgust and sad faces produced from the averaged face on the post treatment of the crowding, were expressed in a deeper way than the other same one. Surprise produced from pretreatment of the maxillary protrusion was expressed in the deeper way than the other same one.The form of the lip changed by the orthognathic surgery, and the facial expression also changed. The present study was suggested that facial expression become rich after orthognathic surgery.

本研究的目的是通过一个专门的计算机系统来研究正颌外科手术对面部表情的影响，面部表情被定义为一个通用的三维面部模型中网格点的移动。一个人的正面人脸图像手动调整到一个通用的模型。根据面部动作编码系统中的动作单元，可以生成个人面部模型的面部表情。将三组患者治疗前后的面部照片平均制成6张面部图像。一组治疗下颌前突，第二组治疗上颌前突，第三组治疗拥挤。每组包括5名女性患者。从正畸治疗前后的平均面部图像中产生六种表情（惊讶、恐惧、厌恶、愤怒、快乐和悲伤）。对99名日本受试者和40名中国受试者的表情进行了评估，结果显示，正颌手术后的平均表情所表现出的高兴、惊讶、恐惧、厌恶和悲伤的表情比正颌手术前的表情更深。上颌骨前突矫治后的快乐面表达较相同矫治后的快乐面更深。在拥挤后处理中，平均脸所产生的恐惧、厌恶和悲伤表情的表达比其他相同的表情更深。上颌前突预处理所产生的惊讶比其他相同的表达方式更深，正颌手术改变了嘴唇的形状，面部表情也发生了变化。本研究提示正颌外科术后面部表情丰富。

项目成果

Naoki MACHIDA: "Clinico-statistical investigation on jaw deformity patients in the past tea years at Orthodontic Clinic of Niigata University Dental Hsp."The Journal of Kouhokushinetsu Orthodontic Society. 8-1. 31-34 (2000)

Naoki MACHIDA：“新泻大学牙科 Hsp 正畸诊所过去茶年对下颌畸形患者的临床统计调查。”《Kouhokushinetsu 正畸学会杂志》。

Shigeo Morishima: "Realtime Face Analysis and Synthesis Using Neural Network"Neural Networks for Signal Processing. 10. 13-22 (2000)

Shigeo Morishima：“使用神经网络进行实时人脸分析和合成”用于信号处理的神经网络。

Shigeo MORISHIMA: "Frace Analysis and Synthesis for Duplicating Expression and Impression"IEEE Signal Processing Magazine. 18-3. 26-34 (2001)

Shigeo MORISHIMA：“复制表达和印象的片段分析和合成”IEEE 信号处理杂志。

町田 直樹: "新潟大学歯学部付属病院矯正科に来院した過去10年間の顎変形症患者に関する臨床統計的調査"甲北信越矯正歯科学会雑誌. 8・1. 31-34 (2000)

町田直树：“近10年来就诊于新泻大学牙科医院正畸科的颌骨畸形患者的临床统计调查”港北信越正畸学会杂志8・1. ）

Shigeo Morishima: "Face Analysis and Synthesis for Duplicating Expression and Impression"IEEE Signal Processing Magazine. 18・3. 26-34 (2001)

Shigeo Morishima：“复制表情和印象的面部分析和合成”IEEE 信号处理杂志 18・3（2001 年）。