Results 21 to 30 of about 12,844,096 (292)

Reconstructing 3D coastal cliffs from airborne oblique photographs without ground control points [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
Coastal cliff collapse hazard assessment requires measuring cliff face topography at regular intervals. Terrestrial laser scanner techniques have proven useful so far but are expensive to use either through purchasing the equipment or through survey ...
T. J. B. Dewez
doaj   +1 more source

GEOMETRIC CALIBRATION OF ZIYUAN-3 THREE-LINE CAMERAS COMBINING GROUND CONTROL POINTS AND LINES [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Due to the large biases between the laboratory-calibrated values of the orientation parameters and their in-orbit true values, the initial direct georeferencing accuracy of the Ziyuan-3 (ZY-3) three-line camera (TLC) images can only reach the kilometre ...
J. Cao   +4 more
doaj   +1 more source

Application of the New “Points in Range” Metrics in the Assessment of In-Hospital Glycemic Control [PDF]

open access: yes, 2023
Introduction Capillary blood glucose (CBG) monitoring remains the most used testing form in hospitals and allows for "points in range (PIR)" metric calculation. This study was conceived to evaluate the metabolic control in patients with diabetes mellitus
Teixeira, Sofia   +3 more
core   +1 more source

BEYOND GROUND CONTROL POINTS: COST-EFFECTIVE 3D BUILDING RECONSTRUCTION THROUGH GNSS-INTEGRATED PHOTOGRAMMETRY [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The process of 3D building modeling serves a multitude of practical and strategic purposes across diverse industries. Building a 3D model involves employing a range of techniques and technologies.
E. Oniga   +5 more
doaj   +1 more source

Ground Control Point Automatic Extraction for Spaceborne Georeferencing Based on FPGA [PDF]

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Feature points that are obtained from the combined speeded-up robust feature (SURF) detector and binary robust independent elementary features (BRIEF) descriptor have a highly robust performance. These points are previously considered the ground control points (GCPs) for building a connection between the image coordinates and the corresponding geodetic
Dequan Liu   +4 more
openaire   +3 more sources

Weakly Supervised Deep Depth Prediction Leveraging Ground Control Points for Guidance

open access: yesIEEE Access, 2019
Despite the tremendous progress made in learning-based depth prediction, most methods rely heavily on large amounts of dense ground-truth depth data for training.
Liang Du   +3 more
doaj   +1 more source

INS-camera calibration without ground control points [PDF]

open access: yes2014 Sensor Data Fusion: Trends, Solutions, Applications (SDF), 2014
In this paper we present an approach for performing system calibration of a sensor suite consisting of a fixed mounted camera and an inertial navigation system without the usage of a photogrammetric calibration site. The aim of the presented work is to obtain accurate direct georeferencing of camera images collected with manned or unmanned aerial ...
Daniel Bender   +3 more
openaire   +1 more source

3D image analysis for pedestrian detection [PDF]

open access: yes, 2006
A method for solving the dense disparity stereo correspondence problem is presented in this paper. This technique is designed specifically for pedestrian detection type applications.
O'Connor, Noel E.   +3 more
core   +2 more sources

Precise Georeferencing of RGB and Multispectral Drone Images without Ground Control Points [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Drones equipped with multispectral cameras are increasingly used in environmental studies. These surveys often take place in challenging locations such as mudflats, where marking and surveying ground control points (GCPs) is difficult, making the use of ...
J. A. Gonçalves   +4 more
doaj   +1 more source

Semi-Automatic Selection of Ground Control Points for High Resolution Remote Sensing Data in Urban Areas

open access: yesApplied Computer Systems, 2016
Geometrical accuracy of remote sensing data often is ensured by geometrical transforms based on Ground Control Points (GCPs). Manual selection of GCP is a time-consuming process, which requires some sort of automation. Therefore, the aim of this study is
Gulbe Linda, Korāts Gundars
doaj   +1 more source

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