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Investigation into the repeatability and precision of casting 3D impressions.

Larsen, H. J. and Bennett, M., 2021. Investigation into the repeatability and precision of casting 3D impressions. Documentation. The Authors. (Unpublished)

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Abstract

The procedure of casting of 3D footwear impressions found at crime scenes has been in place since the early 1900s. For many CSI’s casting is often considered to be the gold standard for recovery, despite little or no research to validate the method in terms of reliability, repeatability and accuracy. In the UK casting has fallen out of favour except in the most important cases due to the time it takes and improvements in conventional forensic photography. It is, however, still widely used in other countries. With the increasing availability of digital alternatives for 3D recovery such as the use of optical laser scanning or SfM photogrammetry it is perhaps timely to consider the potential errors around casting. Using a dataset of 20 casts all created from one flexible silicon mould, two separate assessments are used to examine the variability between each of the casts to determine an estimate of precision.

Item Type:Monograph (Documentation)
Additional Information:This forms part of the integrated thesis of Hannah Larsen.
Group:Faculty of Science & Technology
ID Code:35685
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:23 Jun 2021 09:28
Last Modified:23 Jun 2021 09:28

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