Reliability and validity of handheld structured light scanners and a static stereophotogrammetry system in facial three-dimensional surface imaging

Schipper, J. A. M.; Merema, B. J.; Hollander, M. H. J.; Spijkervet, F. K. L.; Dijkstra, P. U.; Jansma, J.; Schepers, R. H.; Kraeima, J.

doi:10.1038/s41598-024-57370-x

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…The surface-based approach may be of value in combination with 3D photographing, which does not produce ionizing radiation, and is already used in several contemporary studies [17][18][19] . The presented approach for selecting the auricle surface from a virtual head may be applicable to 3D photographing as well.…”

Section: Discussionmentioning

confidence: 99%

A three-dimensional algorithm for precise measurement of human auricle parameters

Lin,

Dobbe,

Lachkar

et al. 2024

Sci Rep

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Measurement of auricle parameters for planning and post-operative evaluation presents substantial challenges due to the complex 3D structure of the human auricle. Traditional measurement methods rely on manual techniques, resulting in limited precision. This study introduces a novel automated surface-based three-dimensional measurement method for quantifying human auricle parameters. The method was applied to virtual auricles reconstructed from Computed Tomography (CT) scans of a cadaver head and subsequent measurement of important clinically relevant aesthetical auricular parameters (length, width, protrusion, position, auriculocephalic angle, and inclination angle). Reference measurements were done manually (using a caliper and using a 3D landmarking method) and measurement precision was compared to the automated method. The CT scans were performed using both a contemporary high-end and a low-end CT scanner. Scans were conducted at a standard scanning dose, and at half the dose. The automatic method demonstrated significantly higher precision in measuring auricle parameters compared to manual methods. Compared to traditional manual measurements, precision improved for auricle length (9×), width (5×), protrusion (5×), Auriculocephalic Angle (5–54×) and posteroanterior position (23×). Concerning parameters without comparison with a manual method, the precision level of supero-inferior position was 0.489 mm; and the precisions of the inclination angle measurements were 1.365 mm and 0.237 mm for the two automated methods investigated. Improved precision of measuring auricle parameters was associated with using the high-end scanner. A higher dose was only associated with a higher precision for the left auricle length. The findings of this study emphasize the advantage of automated surface-based auricle measurements, showcasing improved precision compared to traditional methods. This novel algorithm has the potential to enhance auricle reconstruction and other applications in plastic surgery, offering a promising avenue for future research and clinical application.

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Section: Discussionmentioning

confidence: 99%

A three-dimensional algorithm for precise measurement of human auricle parameters

Lin,

Dobbe,

Lachkar

et al. 2024

Sci Rep

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Design of a Multi-Vision System for a Three-Dimensional Mug Shot Model to Improve Forensic Facial Identification

Giuliani,

Tosti,

Lopes

et al. 2024

Applied Sciences

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A traditional mug shot is a front and side view of a person from the shoulder up, taken by law enforcement. Forensic science is exploring the benefit of working with 3D data offered by new technologies, and there is an increasing need to work with 3D mug shots. Among the various available techniques, a multi-view photogrammetric approach achieves the highest accuracy in the shortest acquisition time. In this work, a multi-view photogrammetric system for facial reconstruction based on low-cost cameras is developed with the aims of verifying the performance of such cameras for the production of a 3D mug shot with submillimetre accuracy and assessing the improvement of facial matching using a 3D mug shot over traditional 2D mug shots. The tests were carried out in both a virtual and a real-world environment, using either a virtual or a 3D-printed 3D model. The outcome is a point cloud, which describes the face. The quantitative analysis of the errors was realized through the distances between the mesh of the acquired 3D model and the point cloud. A total of 80% of the points with a distance of less than ±1 mm was obtained. Finally, the performance on facial recognition of the 3D mug shot is evaluated against the traditional 2D mug shot using the NeoFace Watching software (NeoFACE) with a score increment of up to 0.42 points, especially in scenarios where the suspect is not captured from a frontal view.

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Meeting Regulatory Requirements of Natural Compounds in Skincare

Bhattacharya,

Sachdev

2024

Advances in Chemical and Materials Engineering

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Cosmeceuticals with bioactive natural skincare products appeal to consumers seeking reliable cures. Pharmaceuticals and cosmetics benefit from these antioxidant, anti-inflammatory, and antiaging agents. The bioactive natural skincare components need clearance. One study demonstrated that bioactive natural cosmeceuticals may follow guidelines. The framework covered ingredient sourcing, formulation, safety and efficacy testing, and laws. To ensure purity, efficacy, and sustainability, the technique acquires bioactive natural components from trusted vendors with quality control. Bioactive components improve product performance and synergy during formulation. Cosmetic compositions are tested for toxicology, dermatology, and allergenicity. To increase customer trust and product credibility, preclinical and clinical studies have assessed bioactive natural component medicinal claims. The FDA and EU cosmetics regulations involve substantial documentation, GMP compliance, and tricky navigation. Safety, efficacy, and labeling regulations boost market acceptance and customer trust.

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Reliability and validity of handheld structured light scanners and a static stereophotogrammetry system in facial three-dimensional surface imaging

Cited by 3 publications

References 14 publications

A three-dimensional algorithm for precise measurement of human auricle parameters

A three-dimensional algorithm for precise measurement of human auricle parameters

Design of a Multi-Vision System for a Three-Dimensional Mug Shot Model to Improve Forensic Facial Identification

Meeting Regulatory Requirements of Natural Compounds in Skincare

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