background: in dental practical classes, the acoustic environment is characterized by high noise levels in relation to other teaching areas. the aims of this study were to measure noise levels produced during the different dental learning clinics, by equipments used in dental learning areas under different working conditions and by used and brand new handpieces under different working condition...

A novel structured light method is described. The projection patterns are automatically adapted to the characteristics of the scene as part of the acquisition process, thus maximizing performance and minimizing the number of projection patterns. Color is used for light plane labeling. This allows to increase the dimension of the code space, hence the noise margins, without increasing the number...

noise removal operation is commonly applied as pre-processing step before subsequent image processing tasks due to the occurrence of noise during acquisition or transmission process. a common problem in imaging systems by using cmos or ccd sensors is appearance of  the salt and pepper noise. this paper presents cellular automata (ca) framework for noise removal of distorted image by the salt an...

Using an "information meter" provided by ideal observer analysis, we measured the efficiency with which human observers processed different walking stimuli against luminance noise and spatial uncertainty to either detect the presence of a walker or to discriminate the walking direction. Human efficiency was examined across four renderings of a human walker: contour, point lights, silhouette, an...

Abstract . The photocounting statistics of shot-noise light have been studied extensively. Light exhibiting such statistical properties arises in photongeneration processes that involve a two-stage cascade of Poisson-based events, such as cathodoluminescence . Expressions for the photocounting distributions are complex because they depend on the overall mean of the distribution, the photodetect...

large urban areas are facing growing problems of noise pollutions. geospatial information systems (gis) can conveniently be adapted to gather, analyze and present noise information. gis can also be extended to answer to user specific problems through deterministic and statistics models. the objectives of this research were to measure urban traffic noise levels, analyze temporal and spatial dyna...