Results 21 to 30 of about 296 (144)
Robust autocalibration for a surveillance camera network [PDF]
2013 IEEE Workshop on Applications of Computer Vision (WACV), 2013 We propose a novel approach for multi-camera autocalibration by observing multiview surveillance video of pedestrians walking through the scene. Unlike existing methods, we do NOT require tracking or explicit correspondences of the same person across time/views.
Jingchen Liu +2 more
openaire +1 more source
From consumer to enterprise grade: How the choice of four UAS impacts point cloud quality
Earth Surface Processes and Landforms, Volume 46, Issue 10, Page 2019-2043, August 2021., 2021 In this study, we aim to quantify the magnitude of systematic and random error in digital elevation models derived from four commonly used UAS (XR6/Sony α6000, Inspire 2/X4s, Phantom 4 Pro+, Mavic Pro) following different flight patterns. Differences in mean errors (−0.4 to −1.8 cm) for the XR6, Inspire 2 and Phantom 4 Pro are significant but not ...
Manuel Stark +7 more
wiley +1 more source
Modeling NO3–N leaching during establishment of turfgrasses irrigated with tailored reclaimed water
Vadose Zone Journal, Volume 20, Issue 3, May/June 2021., 2021 Abstract Turfgrass systems have been identified as potential sources of nitrate leaching and subsequent groundwater contamination. The HYDRUS (2D/3D) model was used to quantify nitrate leaching from bermudagrass [Cynodon dactylon (L.) Pers.] and buffalograss [Buchloe dactyloides (Nutt.) Engelm] established by either seed or sod and irrigated with ...
Mengistu Geza +5 more
wiley +1 more source
A New Norm‐Observed Calibration Method Based on Improved Differential Evolution Algorithm for SINS
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 It is vital for a strapdown inertial navigation system (SINS) to be calibrated before normal use. In this paper, a new kind of norm‐observed calibration method is proposed. Considering that the norm of the output of accelerometers and gyroscopes can be exactly the norm of local acceleration of gravity and Earth rotation angular velocity, respectively ...
Yang Liu +4 more
wiley +1 more source
UCalib: Cameras Autocalibration on Coastal Video Monitoring Systems
Remote Sensing, 2021 Following the path set out by the “Argus” project, video monitoring stations have become a very popular low cost tool to continuously monitor beaches around the world. For these stations to be able to offer quantitative results, the cameras must be calibrated.
Gonzalo Simarro +2 more
openaire +4 more sources
Auto-calibration and synchronization of camera and MEMS-sensors
Труды Института системного программирования РАН, 2018 This article describes our ongoing research on auto-calibration and synchronization of camera and MEMS-sensors. The research is applicable on any system that consists of camera and MEMS-sensors, such as gyroscope. The main task of our research is to find
A. R. Polyakov +2 more
doaj +1 more source
Facilitating PTZ Camera Auto-Calibration to Be Noise Resilient With Two Images
IEEE Access, 2019 This paper presents a simple but effective technique to calibrate a PTZ (Pan/Tilt/Zoom) camera by using only two images for five intrinsic parameters: focal length, aspect ratio, the principle point coordinates and the distortion coefficient.
Rui Wang, Ran Huang, Jiaoru Yang
doaj +1 more source
In Operando Monitoring by Analysis of Backscattered Electrons during Electron Beam Melting
Advanced Engineering Materials, Volume 22, Issue 9, September 2020., 2020 A detection system for backscattered electrons (BSE) is used for recording the in operando signal during melting inside an electron beam melting (EBM) system. A comparison between the acquired BSE intensity map and the as‐built surface shows a remarkable correlation, which might be suitable for process monitoring and quality‐control purposes in ...
Christopher Arnold +2 more
wiley +1 more source
Estimating Intrinsic Camera Parameters from the Fundamental Matrix Using an Evolutionary Approach
EURASIP Journal on Advances in Signal Processing, 2004 Calibration is the process of computing the intrinsic (internal) camera parameters from a series of images. Normally calibration is done by placing predefined targets in the scene or by having special camera motions, such as rotations.
Roth Gerhard, Whitehead Anthony
doaj +1 more source
Development and application of microfluidic sweat detection technology in mental health monitoring
VIEW, Volume 6, Issue 3, June 2025.In this review, the authors emphasize the potential of microfluidic sweat detection technology in the field of mental health monitoring. The work explores the intricate relationship between psychological disorders, such as depression and anxiety, and their physiological impact, emphasizing how these conditions can influence systemic health. Furthermore,
Danni Zhao +7 more
wiley +1 more source