Achieving close range photogrammetry with non-metric mobile phone cameras
| Autor: | Oluibukun Gbenga Ajayi, J. O. Odumosu, Victor Chukwuemeka Nnam, Samuel Ajayi |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
QB275-343
business.industry Computer science 020209 energy collinearity equation space resection non-metric cameras 0211 other engineering and technologies 02 engineering and technology Mobile phone Close range photogrammetry 0202 electrical engineering electronic engineering information engineering General Earth and Planetary Sciences Computer vision Artificial intelligence Non metric business Geodesy 3D object space coordinate 021101 geological & geomatics engineering space intersection |
| Zdroj: | Geodesy and Cartography; Vol 47 No 2 (2021); 71-79 Geodesy and Cartography, Vol 47, Iss 2, Pp 71-79 (2021) |
| ISSN: | 2029-6991 2029-7009 |
| Popis: | Close range photogrammetry (CRP) has gained increasing relevance over the years with its principles and theories being applied in diverse applications. Further supporting this trend, the current increase in the wide spread usage of mobile phones with high resolution cameras is expected to further popularize positioning by CRP. This paper presents the results of an experimental study wherein two (2) non-metric mobile phone cameras have been used to determine the 3-D coordinates of points on a building by using the collinearity condition equation in an iterative least square bundle adjustment process in MATLAB software environment. The two (2) mobile phones used were Tecno W3 and Infinix X509 phones with focal lengths of 5.432 mm and 8.391 mm respectively. Statistical tests on the results obtained shows that there is no significant difference between the 3-D coordinates obtained by ground survey and those obtained from both cameras at 99% confidence level. Furthermore, the study confirmed the capability of non-metric mobile phone cameras to determine 3D point positions to centimeter level accuracy (with maximum residuals of 11.8 cm, 31.0 cm, and 5.9 cm for the Tecno W3 camera and 14.6 cm, 16.1 cm and 1.8 cm for the Infinix X509 camera in the Eastings, Northings and Heights respectively). |
| Databáze: | OpenAIRE |
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