Results 31 to 40 of about 18,482 (246)

Coupling Complementary Strategy to U-Net Based Convolution Neural Network for Detecting Lunar Impact Craters

open access: yesRemote Sensing, 2022
Lunar crater detection plays an important role in lunar exploration, while machine learning (ML) exhibits promising advantages in the field. However, previous ML works almost all used a single type of lunar map, such as an elevation map (DEM) or ...
Yuqing Mao   +3 more
doaj   +1 more source

Real-Time Hand Tracking Using a Sum of Anisotropic Gaussians Model [PDF]

open access: yes, 2016
Real-time marker-less hand tracking is of increasing importance in human-computer interaction. Robust and accurate tracking of arbitrary hand motion is a challenging problem due to the many degrees of freedom, frequent self-occlusions, fast motions, and ...
Oulasvirta, Antti   +4 more
core   +1 more source

2D-TDOA passive location based on geodetic longitude and latitude

open access: yesTongxin xuebao, 2019
Because of the surface of the earth is not a plane,there may be some errors in the conventional ultra-short wave passive TDOA location method using plane coordinates.In order to use the geodetic longitude and latitude coordinates directly for TDOA ...
Fangli MA, Yang XU, Peng XU
doaj   +2 more sources

A Methodology for Planar Representation of Frescoed Oval Domes: Formulation and Testing on Pisa Cathedral

open access: yesISPRS International Journal of Geo-Information, 2018
This paper presents an original methodology for planar development of a frescoed dome with an oval plan. Input data include a rigorous geometric survey, performed with a laser scanner, and a photogrammetry campaign, which associates a high-quality ...
Andrea Piemonte   +4 more
doaj   +1 more source

Study on influencing factors and action law of slope stability in end-slope mining field

open access: yesMeikuang Anquan, 2023
Influenced by the coupling effect of “slope stress field” and “roadway group stress field”,the influencing factors of slope stability in end-slope mining field are more complex and the difficulty of slope stability control is significantly increased.
DING Xinpin
doaj   +1 more source

Drawing with Complex Numbers

open access: yes, 2000
It is not commonly realized that the algebra of complex numbers can be used in an elegant way to represent the images of ordinary 3-dimensional figures, orthographically projected to the plane. We describe these ideas here, both using simple geometry and
Eastwood, Michael, Penrose, Roger
core   +2 more sources

Fisheye Photogrammetry to Survey Narrow Spaces in Architecture and a Hypogea Environment [PDF]

open access: yes, 2018
Nowadays, the increasing computation power of commercial grade processors has actively led to a vast spreading of image-based reconstruction software as well as its application in different disciplines.
Baiocchi, Valerio   +9 more
core   +2 more sources

Research on the visual/inertial integrated carrier landing guidance algorithm

open access: yesInternational Journal of Advanced Robotic Systems, 2018
In this article, we describe a visual/inertial integrated carrier landing guidance algorithm for aircraft carrier landing operations. The airborne vision system and the inertial navigation system are employed as sensors to obtain feature points of ...
Yue Meng, Wei Wang, Zhenxing Ding
doaj   +1 more source

Object Reconstruction from 2D Drawing sketch to 3D Object [PDF]

open access: yes, 2016
Design engineer in the early phase of building up another product is  typically using a freehand sketching to communicate or illustrate the idea in the form of orthographic projection. This orthographic projection is based on viewpoint.
Arsalan, Osvari, Passarella, Rossi
core   +4 more sources

Inefficiencies of augmented reality for different sexes and grades in Chinese vocational education

open access: yesScientific Reports, 2023
Nowadays, augmented reality (AR) is becoming more and more prevalent and used in many fields, including education. Previous studies have reported the positive effect of AR to advocate the use of AR in the classroom.
Mingjian Yang   +5 more
doaj   +1 more source

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