[PDF] Smartphone-based video for 3D modelling: Application to infant’s cranial deformation ANALYSIS | Semantic Scholar (2024)

The possibility of integrating photogrammetry either with photos or with video frames and the use of PhotoMeDAS to obtain overall craniofacial 3D models with significant applications in the medical fields of neurosurgery and maxillofacial surgery is suggested.

An unexpected phenomenon appeared during the reconstruction of the transparent cornea – a crater-like depression was formed at the place where nearby objects reflected on the cornea, which corresponds to the first Purkinje image, the so-called glint.

This work aims to create a methodology for improving 3D head reconstruction, with a focus on using selfie videos as the data source, and proposes algorithm improvements that increase reconstruction quality by removing image backgrounds and by selecting diverse and high-quality frames.

The results show that the proposed method is effective, and using the cap with texture leads to a reduction in the camera localization error, and the findings show that caps with sparse dot patterns and a regular knitted patterned winter hat are the preferred patterns.

Experimental results show an agreement with theoretical results regarding the natural frequency and equivalent mass of the beam system which make the smartphone an alternative instrument to teach dynamic vibration of beams in case of the non-availability of professional equipment.

The results show that a four‐camcorder system is capable of measuring a 3D distance in a static setting to better than 0·050 mm; it can track a moving calibrated square‐wave signal of 0·5 and 1 Hz to betterthan 0·3 and 0·2  mm, respectively.

A method for quantifying head shape is explored and the effectiveness of treatment with a cranial remolding orthosis is evaluated to evaluate the success of orthotic treatment of infants with plagiocephaly.

Commercial digital photogrammetric software has been applied to convergent stereoscopic photography of human tooth replicas prepared to exhibit optical texture resulting in successful generation of 3D coordinate data, which brings 3D model generation closer to everyday clinical dental practice.

The usability of the proposed method for efficient 3D reconstruction of heritage object based on UAV video and TLS data is demonstrated, which shows a digital 3D model of the Tulou cluster with complete coverage and textural information.

This paper proposes to use geometric fitting as opposed to algebraic fitting, which is computationally more intensive, but it provides scope for placing visually apparent constraints on ellipsoid parameter estimation and is free from curvature bias.

...

...