How do observers recognize faces despite dramatic image variations that arise from changes in illumination? This paper examines 1) whether face recognition is sensitive to illumination direction, and 2) whether cast shadows improve performance by providing information about illumination, or hinder performance by introducing spurious edges. In Experiment 1, observers judged whether 2 sequentiall...

introduction: the purpose of this study was to evaluate vertical facial and dental changes after orthodontic treatment with extraction of first four premolars, and to find whether long facial height could influence the treatment result. methods: fifty-six orthodontic patients with the minimum age of 15, whose treatment plan involved extracting four first premolars, participated in the study. th...

Deep mining has become the normal state of coal mining; compared with mine shallow buried depth, consequent high level in situ stress and complex distribution have brought severe threats to stability stope surrounding rock roadway. In this research, taking 121304 working face Kouzidong Mine as engineering background, characteristics mining-induced under environment deep are analyzed by using on...

It has been observed that the variations among the images of the same face due to illumination and viewing direction are almost always larger than image variations. One person, with the same facial expression, can appear strikingly different when light source direction and viewpoint vary. These variations are emphasized by additional factors such as facial expressions, perspiration, hair style,...

In this chapter, we report an investigation the influence of the saliency of another person’s direction of gaze on an observer’s eye movements through real-world scenes. Participants’ eye movements were recorded while they viewed a sequence of scene photographs that told a story. A subset of the scenes contained an actor. The actor’s face was highly likely to be fixated, and when it was, the ob...

Many studies have investigated the physical cues that influence face preferences. By contrast, relatively few studies have investigated the effects of facial cues to the direction and valence of others' social interest (i.e. gaze direction and facial expressions) on face preferences. Here we found that participants demonstrated stronger preferences for direct gaze when judging the attractivenes...

This paper analyzes the merits of two biologically-inspired face recognition models, eigenfaces and graphmatching, in the context of related neurophysiological and psychophysical data. Given the ambiguity of current biological evidence, a more promising direction for future face recognition research is in the development of models that conform more closely to human perception of facial similari...

A process to obtain the directional component of the main light source illuminating a human face in an image is described. In the first step of this process, two measures using low resolution data are obtained from the image. The value of these measures is then compared with those obtained from a synthetic model illuminated from different directions. This process, however, is not sufficient to ...