Moskva, Moscow, Russian Federation
employee from 01.01.2023 until now
Russian Federation
employee from 01.01.2023 until now
Russian Federation
UDC 528.74
CSCSTI 36.23
Multicamera photographic systems for creating three-dimensional models of the human body produced abroad are used in medical institutions for plastic surgery and orthodontics. These systems provide high accuracy up to 0.5 mm, but the cost of such solutions can be significant, which limits their availability for public medical centres. This high accuracy of photogrammetric technologies is achieved by sensors that provide highly detailed imaging and rigorous photogrammetric processing algorithms. At the same time, the important task of face shape estimation to analyse its asymmetry is not fully solved. The paper presents the experience of developing a 15-camera photogrammetric system designed for quantitative estimation of human face shape changes. The sources of errors, which inevitably occur when modelling the face of a living person, have been analysed, the real range of errors, which should be expected when shooting with a specialised multicamera photographic systems, has been calculated. As a result, it was determined that the accuracy provided by the stereophotorgammetric method allows to reproduce the facial relief forms (taking into account the variability) with an accuracy not exceeding 1.5 mm. The error introduced by the process of bringing the models into a coherence system of coordinates of the first model is of the order of 1.2–1.4 mm, and the dynamics of facial changes can be reliably assessed if the changes in height (convexity) are not less than 5 mm. These results meet the needs of clinicians, but can be improved by improving the algorithms of mutual orientation of models into a coherence system of coordinates.
specialized multifunctional photographic installation, three-dimensional facial models, accuracy estimation, variability
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