Models of the sensor noise added in the picture capture process are important components of sensor models for vision systems. Most studies assume that the noise can be described by an additive, independent, identically distributed Gaussian model. This paper presents a test of this hypothesis. It gives the results of applying the test to two camera and A/D converter setups. For both of these, th...

Environmental pollution plays a destructive role in the daily life of industrialized communities and due to their negative impact on the society they are always under close investigation.  Besides well-known pollutants substantial, all major international health organizations consider noise pollution as an important health problem.In this study, we have used an animal model to study the effects...

background outer hair cells' (ohcs') dysfunctions as the extent of temporary and permanent threshold shifts (tts and pts) and cochlear damage were assessed in rabbits exposed to continuous noise methods twelve new zealand white rabbits were studied in noise (n) (n=6; exposed to continuous noise; 95 db spl, 500-8000 hz for 8 h per day during 5 consecutive days) and control (c) (n=6; no...

abstract background: advancements in neonatal intensive care unit (nicu) science and technology have increased the survival rate of preterm infants. despite these advances, they are still facing with neurobehavioral problems. noise level in nicu is a potential source of stress for preterm infants. it should be decreased to the standard level as much as possible. the purpose of this study was to...

ultrasound images suffer of multiplicative noise named speckle. different de-speckling algorithms run either in spatial domain or in transformed domain. in this paper, an adaptive filter in spatial domain according to assume the nakagami distribution as the statistic of log-compressed ultrasound images is used. for de-speckling in transformed domain, the non-sub sampled shearlet transform is us...