FreeRef-1 verification, inter-observer and user tests 2023

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. Data for S- and L-mode of the FreeRef-1 system.本数据集包含用于物证摄影的FreeRef-1非接触式尺寸参考系统的验证测试、观察者间测试与用户测试中采集的照片、照片内测量数据，以及通过上述三类测试计算得到的测量误差；同时涵盖该系统S模式与L模式下的相关数据。