Photogrammetric Terminology: Third Edition

Granshaw, Stuart I.

doi:10.1111/phor.12146

Cited by 47 publications

(43 citation statements)

References 14 publications

(20 reference statements)

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“…Precision: it provides a quantitative measure of variability of results and is indicative of random errors, following a Gaussian or normal distribution (Granshaw, 2016). It is related to concepts like reproducibility and repeatability, i.e.…”

Section: Gnss)mentioning

confidence: 99%

“…It coincides with precision when measurements or samples have been filtered from gross errors, and only random errors are present. Usually, accuracy is widely used as a general term for quality (Luhmann et al, 2014;Granshaw, 2016). Typical procedures for determining accuracy include comparison with independent reference coordinates or reference lengths.…”

Section: Gnss)mentioning

confidence: 99%

“…Although recent benchmarks and software evaluations exist (Nex et al, 2015;Aanaes et al, 2016;Knapitsch et al, 2017;Schoeps et al, 2017), the paper focuses on more complex environments, surveyed with different platforms / cameras and comparison metrics are given following a standard terminology (Luhmann et al, 2014;Granshaw, 2016). …”

Section: Paper Objectivesmentioning

confidence: 99%

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A Critical Review of Automated Photogrammetric Processing of Large Datasets

Remondino

Nocerino

Toschi

et al. 2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

121

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ABSTRACT:The paper reports some comparisons between commercial software able to automatically process image datasets for 3D reconstruction purposes. The main aspects investigated in the work are the capability to correctly orient large sets of image of complex environments, the metric quality of the results, replicability and redundancy. Different datasets are employed, each one featuring a diverse number of images, GSDs at cm and mm resolutions, and ground truth information to perform statistical analyses of the 3D results. A summary of (photogrammetric) terms is also provided, in order to provide rigorous terms of reference for comparisons and critical analyses.

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Section: Gnss)mentioning

confidence: 99%

Section: Gnss)mentioning

confidence: 99%

See 1 more Smart Citation

A Critical Review of Automated Photogrammetric Processing of Large Datasets

Remondino

Nocerino

Toschi

et al. 2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

121

View full text Add to dashboard Cite

show abstract

“…The bundle adjustment process may involve control points, as well as embedded GNSS/IMU data. Any observation can furthermore be weighted according to their precision [36]. This enables a rigorous solution to the exterior orientation problem.…”

Section: Bundle Adjustmentmentioning

confidence: 99%

“…The associated process involves the calculation of the exterior orientation parameters [1,35], called extrinsic parameters in the computer vision domain [36]. This analytical procedure is sometimes referred to as "aerotriangulation", although traditionally, aerotriangulation was the term applied to the densification of ground controls ("bridging") [37].…”

Section: Bundle Adjustmentmentioning

confidence: 99%

Open Source and Independent Methods for Bundle Adjustment Assessment in Close-Range UAV Photogrammetry

Murtiyoso

Grussenmeyer

Börlin

et al. 2018

Drones

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Close-range photogrammetry as a technique to acquire reality-based 3D data has, in recent times, seen a renewed interest due to developments in sensor technologies. Furthermore, the strong democratization of UAVs (Unmanned Aerial Vehicles) or drones means that close-range photogrammetry can now be used as a viable low-cost method for 3D mapping. In terms of software development, this led to the creation of many commercial black-box solutions (PhotoScan, Pix4D, etc.). This paper aims to demonstrate how the open source toolbox DBAT (Damped Bundle Adjustment Toolbox) can be used to generate detailed photogrammetric network diagnostics to help assess the quality of surveys processed by the commercial software, PhotoScan. In addition, the Apero module from the MicMac software suite was also used to provide an independent assessment of the results. The assessment is performed by the careful examination of some of the bundle adjustment metrics generated by both open source solutions. A UAV project was conducted on a historical church in the city center of Strasbourg, France, in order to provide a dataset with a millimetric level of precision. Results showed that DBAT can be used to reprocess PhotoScan projects under similar conditions and derive useful metrics from them, while Apero provides a completely independent verification of the results of commercial solutions. Overall, this paper shows that an objective assessment of photogrammetric results is important. In cases where problems are encountered in the project, this assessment method can be useful to detect errors that may not be explicitly presented by PhotoScan.

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Rapid imaging in the field followed by photogrammetry digitally captures the otherwise lost dimensions of plant specimens

James,

Adkinson,

Mast

2023

Appl Plant Sci

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PremiseWe recognized the need for a customized imaging protocol for plant specimens at the time of collection for the purpose of three‐dimensional (3D) modeling, as well as the lack of a broadly applicable photogrammetry protocol that encompasses the heterogeneity of plant specimen geometries and the challenges introduced by processes such as wilting.Methods and ResultsWe developed an equipment list and set of detailed protocols describing how to capture images of plant specimens in the field prior to their deformation (e.g., with pressing) and how to produce a 3D model from the image sets in Agisoft Metashape Professional.ConclusionsThe equipment list and protocols represent a foundation on which additional improvements can be made for specimen geometries outside of the range of the six types considered, and an easy entry into photogrammetry for those who have not previously used it.

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Photogrammetric Terminology: Third Edition

Cited by 47 publications

References 14 publications

A Critical Review of Automated Photogrammetric Processing of Large Datasets

A Critical Review of Automated Photogrammetric Processing of Large Datasets

Open Source and Independent Methods for Bundle Adjustment Assessment in Close-Range UAV Photogrammetry

Rapid imaging in the field followed by photogrammetry digitally captures the otherwise lost dimensions of plant specimens

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