Demonstration of structure-from-motion (SfM) and multi-view stereo (MVS) close range photogrammetry technique for scour hole analysis

Mali, Vijay Kisan; Venu, Pavithra; Nagaraj, M. K.; Kuiry, Soumendra Nath

doi:10.1007/s12046-021-01758-2

Cited by 2 publications

(1 citation statement)

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“…A scale invariant feature transform (SIFT) algorithm is mainly composed of four parts: constructing scale space, extracting key points, assigning main directions and generating feature-point descriptors [22]. The main idea is to filter the extreme points found in the scale space, so as to find the stable feature points.…”

Section: Extraction and Matching Of Image Feature Pointsmentioning

confidence: 99%

Research on Multi-View 3D Reconstruction Technology Based on SFM

Gao

Zhao

Han

et al. 2022

Sensors

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Multi-view 3D reconstruction technology is used to restore a 3D model of practical value or required objects from a group of images. This paper designs and implements a set of multi-view 3D reconstruction technology, adopts the fusion method of SIFT and SURF feature-point extraction results, increases the number of feature points, adds proportional constraints to improve the robustness of feature-point matching, and uses RANSAC to eliminate false matching. In the sparse reconstruction stage, the traditional incremental SFM algorithm takes a long time, but the accuracy is high; the traditional global SFM algorithm is fast, but its accuracy is low; aiming at the disadvantages of traditional SFM algorithm, this paper proposes a hybrid SFM algorithm, which avoids the problem of the long time consumption of incremental SFM and the problem of the low precision and poor robustness of global SFM; finally, the MVS algorithm of depth-map fusion is used to complete the dense reconstruction of objects, and the related algorithms are used to complete the surface reconstruction, which makes the reconstruction model more realistic.

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Section: Extraction and Matching Of Image Feature Pointsmentioning

confidence: 99%

Research on Multi-View 3D Reconstruction Technology Based on SFM

Gao

Zhao

Han

et al. 2022

Sensors

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The possibility of using spherical images in the inventory of cultural heritage - the case of the Royal Castle earthwork

Styś,

Kuszyk

2023

Journal of Modern Technologies for Cultural Heritage Preservati

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The article shows the result of integrating close-range photogrammetry, laser scanning, and spherical images in the cultural heritage inventory in the Royal Castle in Warsaw earthwork. Geodesy-driven inventorying, crucial for object revitalization, involves on-site activities, inspections, and meticulous documentation. Modern photogrammetric challenges, such as precision issues and restricted access to intricate areas, prompt an integrated approach, combining active and passive techniques like Structure from Motion (SfM) and Multi-View Stereo (MVS). The study employs a Leica RTC 360 scanner for point clouds and dense image matching, emphasizing intricate artefact textures. A comprehensive workflow involves control points, photogrammetric networks, and advanced software (e.g., Cyclone REGISTER 360 plus, Agisoft Metashape, CloudCompare). Despite challenges in the initial outcome, masks were introduced on spherical images to address field-of-view issues, which improved the final 3D model. The comparative analysis between the spherical image-based model and laser scanning reveals millimetre-level differences attributed to sand substrate characteristics. The study underscores the potential of spherical images as a cost-effective and accessible resource for high-precision photogrammetry, offering comparable results to laser scanning when similar photographic conditions are applied. In conclusion, the article emphasises the valuable contribution of spherical images to contemporary photogrammetric applications in geodesy. Spherical images present a viable alternative for inventories and 3D model generation for monuments, providing high accuracy within the millimetre range. The accessibility and evolving applications of spherical images position them as a promising solution for future photogrammetric endeavours, accessible to many users.

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Demonstration of structure-from-motion (SfM) and multi-view stereo (MVS) close range photogrammetry technique for scour hole analysis

Cited by 2 publications

References 38 publications

Research on Multi-View 3D Reconstruction Technology Based on SFM

Research on Multi-View 3D Reconstruction Technology Based on SFM

The possibility of using spherical images in the inventory of cultural heritage - the case of the Royal Castle earthwork

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