Resolving Reflection and Resolution in 3D Imaging of Fresh Bone

Abstract

Structured light scanning is a noninvasive, accurate, and cost‐effective 3D imaging technique, but due to reflection issues is yet to be utilized for tool mark analysis on fresh bone. During imaging, reflection from shiny surfaces, such as greasy bone, disrupts image formation. This study tested the David SLS‐1 scanner's ability to image saw marks and explored six strategies to reduce reflection by [1] dulling the surface or [2] altering the projected light. The surface was dulled by freezing, talcum powder, dulling spray, or compressed air. The projected light was altered with a diffuser or limited to single pattern‐coded. Results demonstrated that the resolution was insufficient for capturing minute details of striae. All six tests failed to reduce reflection sufficiently to produce complete images, but projecting vertical pattern‐coded light showed the most promise. Future research is required concentrating on enhancing resolution and exploring the role of pattern‐coded light in reducing reflection.

A 3D Scanning System for Inverse Analysis of Moist Biological Samples: Design and Validation Using Tendon Fascicle Bundles

“…To evaluate the reliability of the 3D scanning system that we developed, we compared the CSA estimated using the vision-based method with CSA estimated based on 3D models, which is schematically shown in Figure 3. Moreover, we compared the results of vision-based measurements and those obtained via reconstructed 3D models with repeated measurements of fascicle bundles with additional anti-reflective talc coating [41]. The calculated CSA and relative error for CSA measurement of uncoated samples are presented in Table 3.…”