Optimizing and Automating Computerized Photogrammetry for 360° 3D Reconstruction

• Júlia Tannús UFU

Resumo

The 3D reproduction of real life objects can be highly useful in several areas, such as archeology, medicine and geology. Computerized photogrammetry is a technique for manufacturing 3D models using digital images, which can provide a highly detailed virtual model while being cheaper than other methods, such as laser and structured light scanning. However, photogrammetry can involve many hours of human labor and, due to this, be prone to errors. This paper presents a low-cost, semi-automated and easy-to-build photogrammetry solution that can assist in batch 3D reconstruction of real life objects in various application areas, consisting of a motorized turntable, tripod, DSLR camera, diffuse light chamber and photographic background. From experimental tests, it was possible to observe that the proposed method can decrease 20.3% of total reconstruction time, while increasing 21% of the model?s quality and greatly reducing the manual labor. A 10 x 8 x 8 cm rock was successfully reconstructed in 360° using a commercial software in 30 min 35 s. In addition, it was found that decreasing the angle between the pictures taken increases the quality of the model, but causes a much greater growth in time, so a balance between time and quality must be considered. In conclusion, if a large number of models are being produced, a system like this may be worth the investment.

Palavras-chave: photogrammetry, turntable, 3D reproduction, low-cost