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Publications related to Cameras (10,000)
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Article
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Prolonged non-contact camera-based monitoring in critically ill patients presents unique challenges, but may facilitate safe recovery. A study was designed to evaluate the feasibility of introducing a non-contact video camera monitoring system into an acute clinical setting. We assessed the accuracy and robustness of the video camera-derived estima...
Article
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Design of new unmanned underwater vehicles (UUVs) is a continuous process since decades, where finding an optimal design for a specific application is still a challenging subject. New inspection class category remotely operated vehicle (ROV) is developed to overcome some disadvantages of existing ROVs of the same category. It has been taken into co...
Article
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ANPR cameras allow the automatic detection of vehicle license plates and are increasingly used for law enforcement. However, also statistical data generated by ANPR cameras are a potential source of urban insights. In order for this data to reach its full potential for policy-making, we research how this data can be shared in digital twins, with re...
Article
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A common problem in video conferences is gaze direction. In face-to-face communication, it is common that speaker and listener intermittently look at each other. In a video-conference setting, where multiple participants are on the screen, things are complicated and not necessarily optimal. If the listener feels looked at when the speaker looks int...
Article
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Martian dust plays a crucial role in the meteorology and climate of the Martian atmosphere. It heats the atmosphere, enhances the atmospheric general circulation, and affects spacecraft instruments and operations. Compliant with that, studying dust is also essential for future human exploration. In this work, we present a method for the deep-learni...
Article
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Conventional vision-based systems, such as cameras, have demonstrated their enormous versatility in sensing human activities and developing interactive environments. However, these systems have long been criticized for incurring privacy, power, and latency issues due to their underlying structure of pixel-wise analog signal acquisition, computation...
Article
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Background To determine the repeatability and agreement using corneal tomography of a swept-source optical coherence tomographer (SS-OCT) compared to a rotating Scheimpflug camera (RSC) in normal eyes and keratoconus (KC) eyes. Methods This prospective repeatability analysis was performed at the Department of Ophthalmology of University Hospital C...
Article
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Objectives Robotic systems are moving toward more interaction with the environment, which requires improving environmental perception methods. The concept of primitive objects simplified the perception of the environment and is frequently used in various fields of robotics, significantly in the grasping challenge. After reviewing the related resour...
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Purpose The aim of the study was to directly measure graft forces of an anterior cruciate ligament reconstruction (ACLR) and a lateral extra-articular tenodesis (LET) using the modified Lemaire technique in combined anterior cruciate ligament (ACL) deficient and anterolateral rotatory instable knees and to analyse the changes in knee joint motion r...
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We present imaging techniques in Mössbauer spectroscopy for an operando measurement of pattern formation in materials, i.e., (1) mapping by focused γ-ray and (2) direct imaging by a CMOS camera combining with the mapping system after converting γ-rays to visible light with a scintillator. From the viewpoint of image processing, mapping interval and...
Article
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Data from three all-sky cameras in Kiruna and Tjautjas (Sweden) were used to estimate the altitude of pulsating arc-like forms using optical tomography. The event under consideration occurred during the substorm recovery phase and comprised both periodic luminosity variation of the on/off type with repetition periods of 3–6 s (main pulsations) and...
Article
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Municipalities across the country have debated the safety effect of automatic red-light cameras (RLC) and their political and financial implications. Most empirical studies have used the Empirical Bayesian (EB) approach to assess the safe effects to facilitate policy debates. While popular, the EB method has several limitations in data requirement,...
Article
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The ejection of a mixture of solid (soil) and liquid (water) phases is one of the aspects of the energy dissipation of the impacting drop during the soil splash phenomenon. All calculations to date have only been taking into account the ejection of solid phase material and were based on significant simplifications of the measured quantities. Theref...
Article
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A naturalistic data-driven study was conducted in Chennai, Tamil Nadu, to study drivers’ physiological stress behavior under Indian traffic conditions. Six male participants with professional driving experience were recruited and asked to complete daily trips in urban roadways of Chennai. The participants completed their trips in a sedan-type four-...
Article
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High dynamic range (HDR) images contain more details of dark and bright regions, which cannot be captured by the standard cameras. Raw HDR data is represented with floating-point precision, and the commonly used lossless/near-lossless HDR image encoding formats produce files that require large storage and are not suitable for transmission. Methods...
Article
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High accuracy 3D surface information is required for many construction robotics tasks such as automated cement polishing or robotic plaster spraying. However, consumer-grade depth cameras currently found in the market are not accurate enough for these tasks where millimeter (mm)-level accuracy is required. This paper presents SL Sensor, a structure...
Conference Paper
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To date, scarce research has been conducted on the development of tools capable of fostering the democratization of the access to collaborative music making over the network. This paper describes a system based on interconnected air instruments conceived for introducing musically untrained people to collaborative music playing. The system consists...
Article
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In this paper, we propose a new set of efficient features for the gaze estimation system that successfully works with a simple and cheap eye gazing system. These features are composed of Pupil – Glint vectors, Pupil – inner-eye-Corner (canthus) vectors, Glint – inner-eye-Corner vectors, distance vector that connects 2 inner-eye-corners, angles betw...
Article
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Image-based visual servoing is a highly coupled system, where the linear velocities and angular velocities can not be controlled independently from each other, leading to complex issues in control. A common problem is that the Cartesian trajectories often involve undesired large camera motions. Such motion is not time-optimal, requires large and po...
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Energy generation affects directly global warming. As buildings consume a large portion of the total generated energy, it is crucial to keep the energy consumption of this sector as less as possible. Poor insulation is the main source of energy losses from buildings envelopes. Although many countries have their rules now to control buildings insula...
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Background Periorbital skin is the thinnest. That is why, it is the easiest to wrinkle and the most challenging to rejuvenate. Platelet-rich plasma (PRP) as well as plasma gel have been used for skin rejuvenation and considered relatively safe and effective. Methods This split-face study was conducted on forty female patients seeking periorbital r...
Article
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The Thermal Image Processing Technique (TIPT) is the most prominent tool for observing an object at night. It is vastly used in many domains like security, healthcare, process control, and surveillance especially in defense vehicles where visualization at night would also mandatory for checking. In this paper, a thermal imaging camera is proposed t...
Article
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Accurate and precise monitoring of the absolute density (i.e., number of fish per area or volume unit) of exploited fish stocks would be strongly advisable for deriving stock status and for designing proper management plans. Moreover, monitoring should be achieved at relevant (i.e., sufficiently large) temporal and spatial scales. This objective is...
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Gypsum plasters are often used in buildings to provide passive protection against fire. This paper studies the fire behaviour of lightweight plasters containing moderate and high doses of expanded perlite. A propane flame was used to study the heat transmission through the plaster from the exposed side to the back side (2 cm thickness) using an IR...
Article
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Digital images on the internet are often designed to manipulate viewers' interpretations. Therefore, it is important to educate viewers regarding potential effects of such techniques. We investigated whether two interventions addressing potential effects of camera angle affect the technique's effect on participants' power-related judgments of depic...
Article
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Welding automation is one of the highly applied research that receives a lot of interest from scientists as well as application engineers in the industry. The welding task can be tedious for the workers; health affected by chemical smoke; or activity performed in a human restricted area. However, at present, manual teaching using Tech-pendant and o...
Article
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Objectives This study assesses the effects of body-worn cameras (BWCs) on rates of fatalities arising from police-citizen encounters. While existing experimental research has not examined this outcome because it is so rare, the staggered roll-out of BWCs across the nation’s law enforcement agencies provides an opportunity for quasi-experimental ana...
Article
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Human activity recognition (HAR) is a process to automatically detect human activities based on stream data generated from various sensors, including inertial sensors, physiological sensors, location sensors, cameras, time, and many others. Unsupervised contrastive learning has been excellent, while the contrastive loss mechanism is less studied. I...
Article
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An automatic detection methodology for “legbreaker” Antipersonnel Landmines (APL) was developed based on digital image processing techniques and pattern recognition, applied to thermal images acquired by means of an Unmanned Aerial Vehicle (UAV) equipped with a thermal camera. The images were acquired from the inspection of a natural terrain with s...
Conference Paper
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Sensors are widely used in the industry to collect information about a physical object. Operational range of the sensor is limited and therefore the sensor needs to be moved around a large complex part in order to capture complete information. Robot arm or manipulators can provide the degrees of freedom needed to maneuver the sensor through the com...
Conference Paper
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Fourier and Truss Methods were applied on otolith shapes of Turbot Scophthalmus maximus populations. Turbot samples were collected from Bandırma in the Marmara Sea, and Sakarya and Giresun in the Black Sea. Otoliths from these samples were removed and cleaned with glycerol, and images of each otolith were taken with digital camera. Images of each o...
Preprint
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Scene change detection (SCD), a crucial perception task, identifies changes by comparing scenes captured at different times. SCD is challenging due to noisy changes in illumination, seasonal variations, and perspective differences across a pair of views. Deep neural network based solutions require a large quantity of annotated data which is tedious...
Article
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Accurate and timely surveys of rice diseases and pests are important to control them and prevent the reduction of rice yields. The current manual survey method of rice diseases and pests is time-consuming, laborious, highly subjective and difficult to trace historical data. To address these issues, we developed an intelligent monitoring system for...
Article
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Social Distancing is the best possible way to detain the spread of Covid-19. Even though vaccine has been found and working effectively in saving the lives of people, social distancing is necessary to reduce the spread of virus to maximum extent which not only saves people from being infected but also reduces the impact of spreading of the disease....
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In this paper we present a novel test methodology for the generation of varying degrees of pre-damage in small soda-lime glass cylinders by dynamic loading in combination with a subsequent contactless damage quantification. In the first step, 13 glass specimens are placed in demountable aluminum confinements. The confinements are then impacted by f...
Article
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Objective To investigate whether sublingual varices are constant or inconstant over time and whether this is connected to background variables, cardiovascular risk factors or disease. Design This longitudinal observational study was performed between 2010 and 2020 at the Public Dental Services Västra Vall, Varberg, Sweden. The study was based on 4...
Article
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Tool wear monitoring and real-time predicting tool life during the machining process is becoming a crucial element in modern manufacturing to properly determine the ideal point to replace tool, remains a challenge currently. In this paper, the model approach for in-process monitoring and predicting progressive tool wear by using machine vision is p...
Preprint
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We describe a data-driven method for inferring the camera viewpoints given multiple images of an arbitrary object. This task is a core component of classic geometric pipelines such as SfM and SLAM, and also serves as a vital pre-processing requirement for contemporary neural approaches (e.g. NeRF) to object reconstruction and view synthesis. In con...
Article
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The prefabricated artificial filled jointed rock specimens are impacted by a self-made drop hammer impact device for many times, and the specimens with different degrees of cumulative damage characteristics are obtained. Then, the static and dynamic compression mechanical properties are studied by using universal testing machine and SHPB device. Th...
Conference Paper
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This paper considers the emergency behavior detection problem inside an elevator. As elevators come in different shapes and emergency behavior data are scarce, we propose a skeleton-based view-invariant framework to tackle the camera view angle variation issue and the data collection issue. The proposed emergency fall detection model only needs to...
Preprint
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The task of recognizing an algebraic surface from its apparent contour can be reduced to the recovering of a homogeneous equation in four variables from its discriminant. In this paper, we use the fact that Darboux cyclides have a singularity along the absolute conic in order to recognize them up to Euclidean similarity transformations.
Conference Paper
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The treatment of burns is supported by accurately estimating measurements such as total body surface area burned (TBSA-b) and total body surface area (TBSA). Computing these values automatically can lead to faster decisions and reduce human error. Deep learning-based methods rely on big data to perform well in practical applications. This is especi...
Article
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The air-water slug flow sub regimes in horizontal pipes were characterized by a liquid holdup model correlated to bubble behavior (LHmBb). The LHmBB has two sections, the liquid holdup model and bubble behavior investigations. The liquid holdup model was developed based on the statistical analysis of the probability density function (PDF) to quanti...
Article
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This paper introduces a new UAV path planning method for creating high-quality 3D reconstruction models of large and complex structures. The core of the new method is incorporating the topology information of the surveyed 3D structure to decompose the multi-view stereo path planning into a collection of overlapped view optimization problems that ca...
Article
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Three Termitomyces samples were collected in fungal surveys during 2008-2012 at different localities and sub-localities of district Ludhiana, Punjab. Detailed morphological examination showed the one of these collections represent a new species and remaining two species are new to district Ludhiana, Punjab. The macroscopic and microscopic character...
Preprint
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Capturing an event from multiple camera angles can give a viewer the most complete and interesting picture of that event. To be suitable for broadcasting, a human director needs to decide what to show at each point in time. This can become cumbersome with an increasing number of camera angles. The introduction of omnidirectional or wide-angle camer...
Article
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One of the most common health risks for senior citizens is a falling event, and to reduces the risk of death, a fall needs to be quickly reported. Thus, automatic fall detection systems were proposed to mitigate the falling problem, most of them relying on image detection. However, identifying a fall from a sequence of images is challenging because...
Article
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As a promising method, unmanned aerial vehicle (UAV) multispectral remote sensing (RS) has been extensively studied in precision agriculture. However, there are numerous problems to be solved in the data acquisition and processing, which limit its application. In this study, the Micro-MCA12 camera was used to obtain images at different altitudes. T...
Preprint
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With the ever-increasing electrification of the vehicle showing no sign of retreating, electronic systems deployed in automotive applications are subject to more stringent Electromagnetic Immunity compliance constraints than ever before, to ensure the proximity of nearby electronic systems will not affect their operation. The EMI compliance testing...
Poster
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With the heavy use of standard optical telecommunication bands and the ever increasing RF spectra congestion, emerging spectral bands are becoming of great interest Possible technologies up to medium distances are visible light communications or free space optical links. The PhD research will be focused on the optical signal generation detection u...
Article
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Additive manufacturing processes, particularly Laser-Based Powder Bed Fusion of Metals (PBF-LB/M), enable the development of new application possibilities due to their manufacturing-specific freedom of design. These new fields of application require a high degree of component quality, especially in safety-relevant areas. This is currently ensured p...
Article
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Contact resistances play a major role in Joule heating systems. Identifying contact resistances provides a better understanding of the heating process and increases the accuracy of the process models. In this study, contact resistances of the Joule heating section in a powder-epoxy-based towpregging line were explored. For different process paramet...
Preprint
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Visual neuroprostheses (bionic eyes) have the potential to treat degenerative eye diseases that often result in low vision or complete blindness. These devices rely on an external camera to capture the visual scene, which is then translated frame-by-frame into an electrical stimulation pattern that is sent to the implant in the eye. To highlight mo...
Article
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This paper presents a method to monitor the thermal peaks that are major concerns when designing Integrated Circuits (ICs) in various advanced technologies. The method aims at detecting the thermal peak in Systems on Chip (SoC) using arrays of oscillators distributed over the area of the chip. Measured frequencies are mapped to local temperatures t...
Article
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Across-season biomass assessment is crucial in the cultivar selection process to accurately evaluate the yield performance of lines under different growing conditions. However, it has been difficult to have an accurate, reliable, and repeated fresh biomass (FM) estimation of large populations of plants in the field without destructive harvesting, w...
Preprint
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The Wide Field Imager for the Athena X-ray telescope is composed of two back side illuminated detectors using DEPFET sensors operated in rolling shutter readout mode: A large detector array featuring four sensors with 512x512 pixels each and a small detector that facilitates the high count rate capability of the WFI for the investigation of bright,...
Preprint
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For the interacting with real world, augmented reality devices need lightweight yet reliable methods for recognition and identification of objects. One of such a class of methods are based supporting CV with 2D bar code derived tags that are high contrast and visually well defined objects. Such tags can be used for finding fiducial points in the sp...