Younger and older observers' ability to perceive local surface orientation from optical patterns of shading and specular highlights was investigated in two experiments. On each trial, the observers viewed a randomly generated, smoothly curved 3-D object and manipulated an adjustable gauge figure until its orientation matched that of a specific local region on the object's surface (cf. Koenderin...

The position, spatial frequency and orientation selectivity properties are believed to have an important role in visual perception. This paper proposes a novel face representation and recognition approach by exploring information jointly in image space, scale and orientation domains. The face image is first decomposed into different scale and orientation responses by convolving multiscale and m...

Local curvature represents an important shape parameter of space curves which are well described by differential geometry. We have developed an estimator for local curvature of space curves embedded in nD grey-value images. There is neither a segmentation of the curve needed nor a parametric model assumed. Our estimator works on the orientation field of the space curve. This orientation field a...

The dendritic and axonal morphology of neurons in the inferior colliculus of the cat was investigated after intracellular injection of HRP, in vivo. All injected axons gave off local collaterals, and most showed a widespread distribution and lacked a specific orientation. In contrast, the dendrites of injected neurons were distinguished by their degree of orientation and the direction of the lo...

the aim of this study was to investigate the effect of positive normative feedback on acquisition and retention of throwing skill. the method was quasi-experimental and the population consisted of the 5th grade elementary female students. 60 students were randomly selected from the population and were randomly assigned to four different groups: normative task-orientation, non-normative task-ori...

the aim of this study was to model the effect of athletic identity on sport orientation in athletes participating in 11th sport olympiad of male students in iran. 400 students were selected as the sample of this study from 2130 students of population. sport orientation questionnaire (soq, gill et al., 1988, α=0.87) and the athletic identity questionnaire (cieslak, 2004, α=0.82) were used. the s...

The development of accurate and robust palmprint verification algorithms is a critical issue in automatic palmprint authentication systems. Among various palmprint verification approaches, the orientation based coding methods, such as competitive code (CompCode), palmprint orientation code (POC) and robust line orientation code (RLOC), are state-of-the-art ones. They extract and code the locall...