Background Uncertainty quantifications are required for any measurement result to be meaningful.

Objective The present work aims at deriving and comparing a priori estimates of displacement uncertainties in T3-stereocorrelation for a setup to perform high temperature tests.

Methods Images acquired prior to the actual experiment (i.e.,at room temperature) were registered using 3-noded triangular elements (T3-stereocorrelation) to determine displacement uncertainties for different positions of the experimental setup.

Results The displacement uncertainties were then compared to their a priori estimates.

Conclusions For the analyzed experiment, it is shown that noise floor estimates only differed by a factor 2 when compared to a posteriori measurements of standard displacement uncertainties.

背景 要求不确定性的量化才能使任何测量结果有意义。

目的 本工作旨在推导和比较T3立体相关中位移不确定性的先验估计，以进行高温测试。

方法在实际实验之前（即在室温下）采集的图像使用三节点三角元素（T3-立体相关）进行配准，以确定实验装置不同位置的位移不确定性。

结果然后将位移不确定性与其先验估计进行比较。

结论对于所分析的实验，与标准位移不确定性的后验测量相比，本底噪声估计仅相差2倍。