Results 11 to 20 of about 12,661 (221)

Cloud Detection and Centroid Extraction of Laser Footprint Image of GF-7 Satellite Laser Altimetry [PDF]

Journal of Geodesy and Geoinformation Science, 2021
The laser altimeter loaded on the GaoFen-7(GF-7) satellite is designed to record the full waveform data and footprint image, which can obtain high-precision elevation control points for stereo image.
Jiaqi YAO,Guoyuan LI,Jiyi CHEN,Genghua HUANG,Xiongdan YANG,Shuaitai ZHANG
doaj   +1 more source

SURVEY OF HISTORICAL GARDENS: MULTI-CAMERA PHOTOGRAMMETRY VS MOBILE LASER SCANNING [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
This paper presents an investigation into the characterization of historical gardens by comparing two 3D survey methodologies. In this context, approaches employing terrestrial laser scanning are considered the most accurate, while Mobile Mapping Systems
L. Perfetti, F. Marotta, F. Marotta, F. Fassi, G. P. M. Vassena   +4 more
doaj   +1 more source

New records of the Anatolian leopard (Panthera pardus tulliana Valenciennes 1856) in Türkiye

The European Zoological Journal, 2022
In this study, new records of the Anatolian leopard obtained in Türkiye after 2004 were presented. Many field studies were carried out in 37 provinces in Türkiye, from Kars in the far east to Edirne in the west, from Antalya in the south to Kastamonu in ...
Ş. Başkaya, E. Başkaya, A. Arpacik, A. Sari, E. Gündoğdu   +4 more
doaj   +1 more source

POINTING BIAS CALIBRATION OF GAOFEN-7 LASER ALTIMETER BASED ON SINGLE LASER FOOTPRINT IMAGE [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
The GaoFen-7 (GF-7) satellite is successfully launched on November 3, 2019, and its laser altimeter system is officially and firstly employed as the main payload for earth observations in China, which includes two sets of laser altimeters and laser ...
J. Xie, J. Xie, R. Liu, F. Mo, H. Tang, H. Jiao, Y. Mei, C. Yang   +7 more
doaj   +1 more source

Towards an Optimal Footprint Based Area Coverage Strategy for a False-Ceiling Inspection Robot

Sensors, 2021
False-ceiling inspection is a critical factor in pest-control management within a built infrastructure. Conventionally, the false-ceiling inspection is done manually, which is time-consuming and unsafe.
Thejus Pathmakumar, Vinu Sivanantham, Saurav Ghante Anantha Padmanabha, Mohan Rajesh Elara, Thein Than Tun   +4 more
doaj   +1 more source

Design and Data Processing of China's First Spaceborne Laser Altimeter System for Earth Observation: GaoFen-7

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
The GaoFen-7 (GF-7) satellite, which was launched on November 3, 2019, is China's first civilian submeter stereo mapping satellite. The satellite is equipped with the first laser altimeter officially in China for earth observation.
Junfeng Xie, Genghua Huang, Ren Liu, Chenguang Zhao, Jun Dai, Taoyong Jin, Fan Mo, Ying Zhen, Shaoli Xi, Hongzhao Tang, Xianhui Dou, Chenchen Yang   +11 more
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Cloud detection of GF‐7 satellite laser footprint image

IET Image Processing, 2021
In November 2019, the GaoFen‐7(GF‐7) satellite was equipped with China's first laser altimeter with full waveform recording capability, which obtains high‐precision long‐range three‐dimensional coordinates. The influence of clouds is noticeable for laser
Jiaqi Yao, Xinming Tang, Guoyuan Li, Jinquan Guo, Jiyi Chen, Xiongdan Yang, Bo Ai   +6 more
doaj   +1 more source

A Practical Interlacing-Based Coverage Path Planning Method for Fixed-Wing UAV Photogrammetry in Convex Polygon Regions

Aerospace, 2022
This paper investigates the coverage path planning problem for a fixed-wing UAV in convex polygon regions with several practical task requirements in photogrammetry considered.
Junhua Huang, Wenxing Fu, Sheng Luo, Chenxin Wang, Bo Zhang, Yu Bai   +5 more
doaj   +1 more source

Microcamera Visualisation System to Overcome Specular Reflections for Tissue Imaging

Micromachines, 2023
In vivo tissue imaging is an essential tool for medical diagnosis, surgical guidance, and treatment. However, specular reflections caused by glossy tissue surfaces can significantly degrade image quality and hinder the accuracy of imaging systems.
Lorenzo Niemitz, Stefan D. van der Stel, Simon Sorensen, Walter Messina, Sanathana Konugolu Venkata Sekar, Henricus J. C. M. Sterenborg, Stefan Andersson-Engels, Theo J. M. Ruers, Ray Burke   +8 more
doaj   +1 more source

Optimizing Appearance-Based Localization with Catadioptric Cameras: Small-Footprint Models for Real-Time Inference on Edge Devices

Sensors, 2023
This paper considers the task of appearance-based localization: visual place recognition from omnidirectional images obtained from catadioptric cameras. The focus is on designing an efficient neural network architecture that accurately and reliably recognizes indoor scenes on distorted images from a catadioptric camera, even in self-similar ...
Marta Rostkowska, Piotr Skrzypczynski
openaire   +3 more sources