We often think of stigmatized individuals as encountering only one stereotype set at a time. Yet, many individuals belong to multiple stigmatized groups, and stereotypes associated with these groups jointly influence how perceivers evaluate targets. Research suggests that perceivers integrate stereotypes about targets’ obvious identities during impression formation; however, no work has examined whether targets’ obvious (e.g., race) and ambiguous (e.g., sexual orientation) identities jointly influence impressions. Given that gay stereotypes are activated automatically, I expected the co-activation of contradictory Black (e.g., aggressive) and gay (e.g., warm) stereotypes to arouse conflict, weakening activation of negative stereotypes and improving evaluations of Black gay targets compared with Black straight targets. Participants in Study 1 rated faces of White straight men as more likable than White gay men, but rated Black gay men as more likable than Black straight men. Participants in Study 2 performed a race-categorization task designed to make race salient; nevertheless, sexual orientation still influenced impressions, producing a pattern similar to Study 1. Participants in Studies 3A (approach-avoidance task) and 3B (evaluative priming task) formed implicit impressions that converged with the explicit evaluations in Studies 1 and 2. In 3A, participants approaching Whites responded faster to straights than gays, whereas participants approaching Blacks responded faster to gays than straights. In 3B, participants recognized positive words somewhat (but not significantly) faster when primed with White straight (versus White gay) and Black gay (versus Black straight) faces. Studies 4A – C suggest that ambiguous categories modify the activation of obvious stereotypes, but do not make targets’ features look less prototypical of their obvious groups. In 4B, participants were slower to recognize Black-stereotypic words (piloted in 4A) when primed with Black gay (versus Black straight) faces. In 4C, participants rated Black straight and gay faces as similarly prototypical of Black phenotypes. Taken together, this work presents implications for stereotyping in the case of multiply-categorizable targets and for impression formation involving ambiguous categories.

Traditional appearance based face recognition (FR) systems use gray scale images, however recently attention has been drawn to the use of color images. Color inputs have a larger dimensionality, which increases the computational cost, and makes the small sample size (SSS) problem in supervised FR systems more challenging. It is therefore important to determine the scenarios in which usage of color information helps the FR system. In this thesis, it was found that inclusion of chromatic information in FR systems is shown to be particularly advantageous in poor illumination conditions. In supervised systems, a color input of optimal dimensionality would improve the FR performance under SSS conditions. A fusion of decisions from individual spectral planes also helps in the SSS scenario. Finally, chromatic information is integrated into a supervised ensemble learner to address pose and illumination variations. This framework significantly boosts FR performance under a range of learning scenarios.

Feature extraction is an important step in the classification of high-dimensional data such as face images. Furthermore, linear feature extractors are more prevalent due to computational efficiency and preservation of the Gaussianity. This research proposes a simple and fast linear feature extractor approximating the sufficient statistic for Gaussian distributions. This method preserves the discriminatory information in both first and second moments of the data and yields the linear discriminant analysis as a special case. Additionally, an accurate upper bound on the error probability of a plug-in classifier can be used to approximate the number of features minimizing the error probability. Therefore, tighter error bounds are derived in this work based on the Bayes error or the classification error on the trained distributions. These bounds can also be used for performance guarantee and to determine the required number of training samples to guarantee approaching the Bayes classifier performance.

The main aim of this thesis is to generate 3D models of human heads from uncalibrated images. In order to extract geometric values of a human head, we find camera parameters using camera auto calibration. However, some image sequences generate non-unique (degenerate) solutions. An algorithm for removing degeneracy from the most common form of camera movement in face image acquisition is described. The geometric values of main facial features are computed initially. The model is then generated by gradual deformation of a generic polygonal model of a head. The accuracy of the models is evaluated using ground truth data from a range scanner. 3D models are covered with cylindrical texture values obtained from images. The models are appropriate for animation or identification applications.

The literature shows that maxillofacial fractures in children are uncommon. Although the Department of Oral and Maxillofacial Surgery of the Faculty of Dentistry, of the University of the Western Cape, has been providing a service to the Red Cross Children&rsquo / s Hospital (RXH) for the past twenty years, no study had been undertaken to determine the age, gender, number of patients per year, aetiology, patterns, and management of maxillofacial fractures at this institution. A retrospective records based study was undertaken to determine these features. This study accessed the records of patients seen at the trauma unit at RXH, from 1994 to 2003 inclusive, and referred for maxillofacial attention.<br /> <br /> One-hundred-and-five patient records were obtained and analyzed using the SPSS statistic package. One-hundred-and-twenty-seven fractures were recorded in one hundred and five patients. The age of the patients ranged from one to thirteen. Sixty-five male and forty female patients were seen. Dentoalveolar fractures were the most common fracture seen in both the midface and mandible. Midface fractures were more common than mandibular fractures. Falls, followed by motor vehicle accidents, were the most common cause of facial fractures. Most fractures were successfully managed by closed procedures. At this institution, nasal and frontal fractures have surprisingly little or no input from the Department of Oral and Maxillofacial Surgery.

In recent times, there has been an increase in national security awareness with a focus on improving current practices relating to the identification and verification of individuals and the reduction of identity fraud. One tool that has been found to assist in these areas is biometrics. This thesis examines some biometric technologies that may be potentially suitable for surveillance and access control applications, and shows why facial recognition technology has been the focus of this study. / Thesis (PhDElectronicSystemsEngineering)--University of South Australia, 2005.

Typescript (Photocopy) / A stereo-viewer is provided ... to facilitate fusing of the three dimensional CT reconstructions and the stereo wire frame models--Pref. v. 2 / Bibliography: leaves [244]-263 / 3 v. : ill ; 30 cm. + 1 viewer (Taylor-Merchant stereopticon 707) in back pocket of vol. 2 / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--Dept. of Dentistry, University of Adelaide, 1990

Typescript (Photocopy) / Includes published papers coauthored by the author / Bibliography: leaves 387-428 / xx, 428 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Summary: Describes the use of a new measurement technique for the study of the facial expression of emotion. Based on a mathematical model of the face, a microcomputer approach is utilized to quantify facial movement / Thesis (Ph.D.)--University of Adelaide, Dept. of Psychiatry, 1993

The dissertation is based on the analysis of thirty episodes of the American television series Friends with the focus on the CSIs (Culture Specific Items) and how these differences have been handled by Chinese translators who produced the subtitles for the English-Chinese translation. The analysis was based on the assumption that Mainland China’s culture is different from the US culture so people in these two countries may have problems in understanding CSIs if they are translated literally and if the subtitle translation is not adapted to the target audience. Such adaptation is normally known as localisation. The cultural differences that are ingrained in CSIs might have to be handled with caution in the production of subtitles. The main objective of the dissertation has been to analyse different translation choices which are currently used by the translators in questions, dealing with CSIs where cultural differences between mainland China and the US arise. The research discovered that repetition of CSIs is a strategy which underperformed, failing to help the Chinese audience to comprehend the cultural connotations associated with the CSIs. The paper has provided some recommendations as to how the subtitle translation of such CSIs might be handled in such a way that the audience will have a better understanding of the same.

The dissertation is based on the analysis of thirty episodes of the American television series Friends with the focus on the CSIs (Culture Specific Items) and how these differences have been handled by Chinese translators who produced the subtitles for the English-Chinese translation. The analysis was based on the assumption that Mainland China’s culture is different from the US culture so people in these two countries may have problems in understanding CSIs if they are translated literally and if the subtitle translation is not adapted to the target audience. Such adaptation is normally known as localisation. The cultural differences that are ingrained in CSIs might have to be handled with caution in the production of subtitles. The main objective of the dissertation has been to analyse different translation choices which are currently used by the translators in questions, dealing with CSIs where cultural differences between mainland China and the US arise. The research discovered that repetition of CSIs is a strategy which underperformed, failing to help the Chinese audience to comprehend the cultural connotations associated with the CSIs. The paper has provided some recommendations as to how the subtitle translation of such CSIs might be handled in such a way that the audience will have a better understanding of the same.