161 |
A Facial Model and Animation Techniques for Animated SpeechKing, Scott Alan 11 October 2001 (has links)
No description available.
|
162 |
Secrets of a smile? Your gender and perhaps your biometric identityUgail, Hassan 11 June 2018 (has links)
No / With its numerous applications, automatic facial emotion recognition has recently become a very active area of research. Yet there has been little detailed study of the dynamic components of facial expressions. This article reviews research that shows gender is encoded in the dynamics of a smile, and how it may be possible to use the dynamic components of facial expressions as a form of biometric.
|
163 |
Young children's behaviour and interactive tasks : the effects of popularity on communication and task performanceMurphy, Suzanne Marguerite January 1999 (has links)
No description available.
|
164 |
Social implications of Dentofacial defomitiesShaw, W. C. January 1980 (has links)
No description available.
|
165 |
Análisis de la percepción estética de la sonrisaPalma Pinto, Carolina Paz January 2010 (has links)
Trabajo de Investigación Requisito para optar al Título de Cirujano Dentista / Autor no autoriza el acceso a texto completo de su documento / Introducción:
La belleza es una continua búsqueda en el hombre, dado que es
considerada un atributo que puede abrir puertas en la sociedad en todo ámbito, es
por esta razón, entre otras, que pacientes acuden al Odontólogo para lograr una
apariencia armoniosa en su rostro.
Por este motivo, es imprescindible saber la importancia que los individuos le
otorgan a la sonrisa, tanto como expresión como en relación a los elementos
constituyentes, de tal manera que el profesional pueda comprender las
necesidades y requerimientos del paciente.
Metodología:
La metodología utilizada en el presente trabajo fue de tipo cualitativa, se
realizaron 35 entrevistas semi estructuradas a hombres y mujeres chilenas legos
en estética dentaria, residentes de la Región Metropolitana, 17 jóvenes y 18
adultos.
Se excluyeron estudiantes de Odontología y Odontólogos.
Cada entrevista fue transcrita y codificada con el fin de confeccionar un
modelo explicativo por medio del método de la Teoría Fundamentada.
Resultados:
El presente estudio establece que ambos grupos entrevistados valora la
sonrisa como una expresión que denota sentimientos positivos, siendo un rasgo
importante en el rostro, sobre todo para los individuos adultos. Sin embargo
existen diferencias entre los grupos entrevistados en relación a preferencias y
requisitos de una sonrisa bella.
Conclusiones:
La sonrisa como expresión facial es un rasgo importante en jóvenes y por
sobretodo en adultos, rasgo influyente en la percepción de atractivo y belleza del
rostro.
La mujer es asociada a esta expresión facial, mientras que los hombres son
asociados a expresiones más serias. Sin embargo, ambos grupos entrevistados
concuerdan que el chileno es una persona que no sonríe frecuentemente.
Entre los elementos constituyentes de una sonrisa bella, tanto en jóvenes
como en adultos, están las piezas dentarias, ambos grupos coindicen en la
importancia de tener todas las piezas dentarias, pero difieren en lo primordial de
esta expresión, siendo para los jóvenes fundamental la alineación dentaria, en
cambio para los adultos es más importante el color de los dientes.
|
166 |
Análisis de la percepción estética facialReyes Aguilera, Milton César January 2010 (has links)
Trabajo de Investigación Requisito para optar al Título de Cirujano Dentista / Autor no autoriza el acceso a texto completo de su documento / Introducción:
RESUMEN
El interés por la belleza, en particular la belleza facial, ha sido y será uno de
los grandes temas a esclarecer. La continua búsqueda del hombre por su
comprensión se debe fundamentalmente a que es considerada un atributo
importante en la sociedad. Es por esta razón, entre otras, que pacientes acuden al
Odontólogo para lograr una apariencia armoniosa en su rostro.
Por este motivo, se hace necesario conocer cuál es la percepción de los
individuos, que acuden al dentista por un tratamiento estético, en relación a lo que
ellos consideran un rostro bello, y la importancia e influencia de la sonrisa como
rasgo de expresión, de tal manera que el profesional pueda comprender las
necesidades, requerimientos y expectativas del paciente.
Metodología:
La metodología utilizada en el presente trabajo fue de tipo cualitativa, bajo
un enfoque interpretativista; se realizaron 35 entrevistas semi-estructuradas a
hombres y mujeres chilenos, legos en el tema de estética facial, residentes de la
región metropolitana, 20 jóvenes y 15 adultos.
Cada entrevista fue transcrita y codificada con el fin de confeccionar un
modelo explicativo por medio del método de la teoría fundamentada (Grounded
Theory), la cual pretende generar una teoría de manera inductiva y deductiva
mediante el análisis de contenido.
Resultados:
El presente estudio estableció que ambos grupos entrevistados consideran
que la belleza del rostro se relaciona principalmente a los conceptos de simetría y
proporción. La sonrisa y la mirada fueron consideradas los rasgos de expresión
más importantes, mientras que otros rasgos como la nariz y el mentón,
relacionados a rasgos de personalidad, lo eran menos. Otros rasgos fueron
8
catalogados como rasgos diferenciativos entre las personas y no promovían, en
general, a un aumento en la belleza facial.
Conclusiones:
La percepción estética facial se ve influenciada por diferentes factores.
Entre ellos tenemos una evolución histórica de lo que es considerado bello,
relacionado principalmente a mecanismos culturales. Otro factor de importancia
es la mentalidad propia de cada persona relacionado a las emociones que evoca
ver un rostro bello. Existen también características intrínsecas individuales
derivadas del entorno social en el que se desarrollan las personas.
|
167 |
Activation Of Trpv1 Channel Contributes To Serotonin-Induced Constriction Of Mouse Facial ArteryZhou, Bolu 01 January 2017 (has links)
Tight regulation of cephalic blood circulation is critical under normal physiological conditions, and dysregulation of blood flow to the head occurs in pathophysiological situations such as stroke and migraine headache. The facial artery is an extracranial artery which is one of branches from the external carotid artery territory and its extracranial position indicates its importance in regulating head hemodynamics. Transient receptor potential vanniloid type 1 (TRPV1) is a cation channel permeable to Ca2+ and Na+. Intracellular Ca2+ increase causes vasoconstriction. A previous study indicated the presence of TRPV1 in smooth muscle cells in the facial artery. Protein kinase C (PKC) is found to sensitize TRPV1 channels in neurons. Our lab's preliminary data suggested PKC modulates TRPV1 in the middle meningeal artery. Serotonin (5-HT) is an endogenous vasoconstrictor, and the 5-HT2 receptor is a Gq-protein-coupled receptor that activates PKC. In the present study, we found that 5-HT caused facial artery constriction. Thus, we studied whether TRPV1 channel acting as a Ca2+ entry channel is involved in 5-HT induced facial artery constriction. We used a pressurized arteriography technique to examine the artery diameter. The results indicate that 1) TRPV1 antagonist blunted 30 nM 5-HT-induced mouse facial artery constriction. 5-HT constriction on the facial artery from TRPV1 knock out mice was significantly blunted compared to the constriction on the facial artery from wild type mice; 2) PKC, which is a downstream signaling molecule of 5-HT2 receptor, is involved in capsaicin (TRPV1 agonist)-induced facial artery constriction; 3) 5-HT-induced facial artery constriction is mediated mostly by activation of 5-HT1 and 5-HT2 receptors; 4) 5-HT2 but not 5-HT1 receptor is involved in 5-HT-induced facial artery constriction via opening of TRPV1 channels; 5) PKC may be involved in 5-HT-induced facial artery constriction; 6) The L-type-voltage-dependent Ca2+ channel is involved in 5-HT-induced facial artery constriction. We conclude that activation of TRPV1 channel contributes to serotonin-induced 5-HT2 receptor-mediated constriction of the mouse facial artery.
|
168 |
A novel facial action intensity detection systemBingol, Deniz 30 January 2015 (has links)
A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. October 2014. / Despite the fact that there has been quite a lot of research done in the eld of facial
expression recognition, not much development has occurred in detecting the intensity
of facial actions. In facial expression recognition, the intensity of facial actions is an
important and crucial aspect, since it would provide more information about the facial
expression of an individual, such as the level of emotion in a face. Furthermore, having
an automated system that can detect the intensity of facial actions in an individual's
face can lead up to a lot of potential applications from lie detection to smart classrooms.
The provided approach includes robust methods for face and facial feature extraction,
and multiple machine learning methods for facial action intensity detection.
|
169 |
Age-related perceptions of facial profile attractiveness in South AfricansMorar, Ajay 21 September 2010 (has links)
MSc (Dent), Orthodontics, Faculty of Health Sciences, University of the Witwatersrand / This study evaluated the influence of age on the perception of facial attractiveness in three samples of South Africans. Eight digitally morphed lateral facial profiles were created by means of computer animation software and presented, in sequential order, to 1798 school learners, 694 university students and 323 school teachers. Each participant was asked to complete a questionnaire in addition to choosing a single face he/she perceived to be the most attractive.
Statistical tests included frequency distributions, percentages, cross-tabulations, odds ratios and the Pearson Chi-square test. Results demonstrated that age was a factor in the perception of facial attractiveness particularly amongst individuals of school-going age. Thereafter, increasing age did not exert a significant influence on the perception of profile preference. There was a definite trend towards the preference for less protrusive facial profiles. Nevertheless, due consideration should be given to the individuality associated with aesthetic choices as a significant proportion of raters did indicate a preference for profiles exhibiting mild protrusion. Furthermore, race and cultural background do appear to play a significant role in the perception of facial profile preferences.
It is suggested that future studies of a similar nature be undertaken in order to provide the data to permit comparison with the results reported in this study.
|
170 |
Proposta de metodologia de análise fotoantropométrica para identificação humana em imagens faciais em norma frontal / Proposed methodology for photoanthropometry analysis for human identification in frontal view facial imagesFlores, Marta Regina Pinheiro 31 July 2014 (has links)
A face é a parte do corpo que mais sintetiza o ser humano e, para que seja entendida, vem sendo alvo de estudos dos mais diversos campos da ciência, incluindo a área da Identificação Facial Forense. A ciência responsável pelo estudo da face e de suas relações, denominada Cefalometria, apesar de exaustivamente estudada para o emprego clínico e radiográfico, principalmente por profissionais da Odontologia, ainda não foi padronizada e validada para o seu emprego em análises faciais sobre imagens e/ou fotografias. Em virtude do crescimento da produção tecnológica e automatizada da era em que vivemos, onde aparelhos com câmeras fotográficas acopladas fazem parte da vida corriqueira da grande maioria da população mundial, é necessário o desenvolvimento de metodologias que confirmem a objetividade, reprodutibilidade e confiabilidade de suas análises, principalmente para as áreas que exigem precisão e rigor técnico-científico, como a perícia criminal. Neste sentido, o presente trabalho teve como objetivo propor uma metodologia de normatização na determinação de pontos cefalométricos para exames faciais exclusivamente baseados em imagens em norma frontal e definir quais são os pontos cefalométricos que apresentam maior e menor variabilidade de aferição, para possível aplicação na identificação humana. A parte experimental do estudo foi delineada em duas etapas: na primeira fase, foi utilizado o método convencional (cefalométrico clássico) para a descrição dos pontos anatômicos de referência; na segunda, o método fotoantropométrico proposto. Ambas as fases foram analisadas por cinco examinadores, os quais marcaram 16 pontos na topografia facial de 18 imagens, aleatoriamente escolhidas de um banco de imagens. Para todas as análises, foi utilizado um software desenvolvido pelo Serviço de 13 Perícias em Audiovisual e Eletrônicos do Instituto Nacional de Criminalística da Polícia Federal, denominado de SMVFace. Pode-se observar que houve uma grande redução da variabilidade dos pontos anatômicos após a adoção da descrição fotoantropométrica, principalmente para os pontos Alar, Endocanthion, Glabela, Gônio, Irídio Medial, Labial Superior e Zígio. Contrariamente, um ligeiro aumento na variabilidade dos pontos Chelion, Labial Inferior e Gnátio foi observado. Apesar do aumento na variabilidade desses pontos, a maioria das marcações foi realizada abaixo do erro aceitável preconizado por alguns estudos. Esses resultados demonstraram que, apesar de algumas limitações, a utilização da descrição fotoantropométrica proposta foi determinante para alcançar uma maior precisão das marcações dos pontos anatômicos de referência de forma geral / Face is the body part that most synthesizes the human being and, to be understood, has been targeted from different branches of science, including the Forensic Facial Identification area. The Cephalometry, science responsible for facial studies and their relationships, although extensively studied for clinical and radiographic employment, especially by dental professionals, it has not been standardized and validated yet for its use in facial images and/or photo analysis. Due to the growth of technology and automated production of the era in which we live, where camera-coupled devices are part of vast majority ordinary life of world population, methodologies development is necessary to confirm the objectivity, reproducibility and reliability of their analyzes, especially for areas that require precision and technical/scientific rigor as criminal expertise. In this sense, this research aimed to propose a standardization method in determining cephalometric points exclusively based on frontal view facial images and determine which points have higher and lower variability of measurement, for possible use in human identification. The experimental part of the study was drawn in two stages. In the first phase, the conventional method (classic cephalometry) was used to describe the reference anatomical points and, in the second, the proposed photoanthropometric method was used. Both phases were analyzed by five examiners who scored 16 points in facial topography of 18 images randomly chosen from an image database. For all analyzes, a software developed by the Expertise Service in Audiovisual and Electronics of the National Institute of Criminology, Federal Police, called SMVFace, was used. It could be observed that there was a large variability reduction of anatomical points after the photoanthropometry description adoption, especially for 15 Alar, Endocanthion, Glabella, Gonion, Iridium Medial, Upper Lip and Zigion points. In contrast, a slight variability increase of Chelion, Lower Lip and Gnathion points was observed. Despite the increased variability of these points, most markings are performed below the acceptable error advocated by some studies. These results demonstrate that, although some limitations, the use of the proposed photoanthropometric description was crucial to achieve greater accuracy of anatomical landmarks determination in general
|
Page generated in 0.0184 seconds