cff-version: 1.2.0
abstract: "<p>Photographs, measurements done in photographs and calculated measurement errors from verification tests, inter-observer tests and user tests of the FreeRef-1 contactless size-reference system for evidence photography.</p>
<p>Data for S- and L-mode of the FreeRef-1 system.</p>"
authors:
  - family-names: Loeve
    given-names: Arjo J.
    orcid: "https://orcid.org/0000-0002-4449-9582"
  - family-names: Schiks
    given-names: Luuk
  - family-names: Cook
    given-names: Maura
  - family-names: van den Hoven
    given-names: Paul
  - family-names: Hutchinson
    given-names: Kim
  - family-names: Van Dijke
    given-names: A.P. (Arjan)
  - family-names: Lipman
    given-names: Lars
title: "FreeRef-1 verification, inter-observer and user tests 2023"
keywords:
version: 1
identifiers:
  - type: doi
    value: 10.4121/22180438.v1
license: CC BY-NC-ND 4.0
date-released: 2023-02-28