Coarse-to-Fine Image Matching-Based Footprint Camera Calibration of the GF-7 Satellite [PDF]
Sensors, 2021 The GF-7 satellite is China’s first high-resolution stereo mapping satellite that reaches sub-meter resolution, equipped with new-type payloads, such as an area array footprint camera that can achieve synchronization acquisition of laser spots. When the satellite is in space, the variation of camera parameters may occur due to launch vibration and ...
Lirong Liu, Junfeng Xie, Xinming Tang
exaly +7 more sources
Laser Spot Center Location Method for Chinese Spaceborne GF-7 Footprint Camera [PDF]
Sensors, 2020 The Gaofen-7 (GF-7) satellite is equipped with two area array sensor footprint cameras to capture the laser altimeter spot. In order to establish a direct correspondence between the laser data and the stereo image data, a new method is proposed to fit the center of the spot using the brightness difference between the spot image and the footprint image.
Chaofeng Ren, Junfeng Xie, Yun Yang
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In‐orbit geometric calibration approach and positioning accuracy analysis for the Gaofen‐7 laser footprint camera [PDF]
IET Image Processing, 2021 Abstract The Gaofen‐7 (GF‐7) satellite is China's first submeter high‐resolution optical stereo‐mapping satellite. The satellite is equipped with two area‐array laser footprint cameras to capture the laser spots emitted by laser altimeters.
Junfeng Xie +2 more
exaly +4 more sources
Rigorous Sensor Model of Gaofen-7 Satellite Laser Altimeter Based on Coupled Footprint Camera
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 The Gaofen-7 (GF-7) satellite system adds a footprint camera that shares the same optical path as its laser altimeter to ensure consistent spatial referencing between the laser footprint point and the obtained optical images. However, this introduces additional errors between the two different loads while ensuring the geometric relations of the laser ...
Shaoning Li, Guo Zhang
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Research on the Control Point Extraction Method of Chinese Gaofen 7 Satellite Using Altimeter and Footprint Camera [PDF]
EPJ Web of Conferences, 2020 Satellite laser altimetry is one of the most advanced information acquisition technologies in Earth observation system. It can provide high-accuracy elevation information, however, due to the lack of detail intensity information, its planimetric accuracy is usually worse than the elevation accuracy.
Huan Xie, Xiaohua Tong
exaly +4 more sources
On-Orbit Geometric Calibration and Accuracy Validation for Laser Footprint Cameras of GF-7 Satellite
Remote Sensing, 2022 The Gaofen-7 (GF-7) satellite uses a two-beam laser altimetry system in which each beam is equipped with a laser footprint camera (LFC) to provide geometric processing of the laser footprint images that assist in optical image stereo mapping. Because of the violent vibrations during launch and the difference in the environment before and after entering
Jiyi Chen, Xinming Tang, Guoyuan Li
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2D visual area coverage and path planning coupled with camera footprints
Control Engineering Practice, 2018 Unmanned Aerial Vehicles (UAVs) equipped with visual sensors are widely used in area coverage missions.
Sina Sharif Mansouri +2 more
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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 +4 more sources
You're on [Post]Did Camera: Third Parties' Expansion of Employees' Digital Footprint
University of Pittsburgh Law Review, 2020 N ...
Elizabeth L. Hitt
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Range-Wide Camera Trapping for the Australian Cassowary Reveals Habitat Associations With Rainfall and Forest Quality. [PDF]
Ecol EvolThe Australian Wet Tropics rainforests are a biodiversity hotspot covering just 0.2% of the continent's land area. However, historic forest loss, modern fragmentation, and climate change continue to threaten these ecosystems.
Anderson SE, Amir Z, Bruce T, Luskin MS.
europepmc +2 more sources