The random encounter model (REM) is a novel method for estimating animal density from camera trap data without the need for individual recognition. It has never been used to estimate the density of large carnivore species, despite these being the focus of most camera trap studies worldwide. In this context, we applied the REM to estimate the density of female lions (Panthera leo) from camera tr...

Automated close-range photogrammetric measurement has traditionally been associated with expensive specialist cameras and usually requires highly controlled image illumination conditions. In the past few years, however, there has been a significant amount of research into the development of automated routines and algorithms that support the employment of consumer-grade colour digital cameras fo...

Objective: Effective utilization of an optical tracking system for image-based surgical guidance requires optimal placement of the dynamic reference frame (DRF) with respect to the tracking camera. Unlike other studies that measure the overall accuracy of a particular navigation system, this study investigates the precision of one component of the navigation system: the optical tracking system ...

recently many studies have been done on different issues of using multiple antennas at transmit and receive sides of a radar system in a mimo (multiple input multiple output) configuration. in addition, for the electronic warfare‟s purposes, the utilization of available signals of the environment to detect the targets has gained considerable attention in recent years. such passive radars use th...

many real world problems can be modelled as an optimization problem. evolutionary algorithms are used to solve these problems. ant colony algorithm is a class of evolutionary algorithms that have been inspired of some specific ants looking for food in the nature. these ants leave trail pheromone on the ground to mark good ways that can be followed by other members of the group. ant colony optim...

Breaking waves constitute one of the main environmental stressors on coastal structures as well a leading hazard to navigation in nearshore regions. In this paper, we use camera-based methods measure wave breaking over two jetty systems Pacific Northwest; North Columbia River, Washington state, and jetties Coos Bay, Oregon, three nearby dredge disposal areas. Data were collected using “brightes...

Abstract The use of camera‐trap methods, though important, has pitfalls and inconsistencies such as factors interactions that may influence species photo rates. Jaguar ( Panthera onca ) studies place cameras at sites where jaguar detections are likely greater (e.g., with previous evidence tracks, feces, other presence signs), but do not account for potential placement biases. Our study evaluate...

with the increase of the number of cameras installed across a video surveillance network, the ability of security staffs to attentively scan all the video feeds actually decreases. therefore, the need for an intelligent system that operates as a tracking system is vital for security personnel to do their jobs well. tracking people as they move through a camera network with non-overlapping field...

Multi-camera networks are an increasingly common approach to three dimensional sensing. Although the potential of this technology is appealing, designing such networks is a difficult and still open problem. How many and what type of cameras should be used? How should they be distributed in the environment? In this report we explore how these design parameters influence system performance using ...