Development and implementation of technical decision for digital support of construction using photogrammetry methods

Highlights: • Issntroduction to photogrammetry, basic photogrammetry algorithm. • The method of comparison "as built" with the design model of the same object is considered. • Possible applications of the methodology in various areas where it is necessary to control construction are discussed. The SfM-algorithm (Structure from Motion) as a computer vision algorithm is commonly applied and has been extensively studied. The possibility of using the SfM-algorithm during the construction of the NPP (nuclear power plant) is considered in this study. The aim of the study is to analyze basic 3D-scanning methods to find a decision for digital support of the NPP construction. To achieve this aim, it is necessary to: • study basic 3D scanning methods in detail; • examine 3D scanning methods in practice; • identify specific features of 3D scanning methods; • create a methodology based on the specific features of 3D scanning methods. Special attention is given to the influence of specific features on the result. This study demonstrates the features of applying the SfM-algorithm to control the NPP construction. 3D-models of nuclear facilities were obtained by using SfM- and MVS-methods and then comparing these models with the project (with the reference) made it possible to find construction deviations. Important characteristics of the methodology are accuracy, usability and profitability. The technique for digital support of the NPP construction was found and tested. The obtained technique has already found its application in the NPP construction as a part of the «Proryv» project in Russia. The study enables a better understanding of scanning methods advantages and the scope of their application.