Performing digital image correlation (DIC) at extreme temperatures has been greatly challenging due to the radiation which saturates the camera sensor. At such high temperatures, the light intensity emitted from an object is occasionally so powerful that the acquired images are overwhelmingly saturated. This induces data loss, potentially ruining the test, thus requiring the user to restart the test. For this reason, selection of an appropriate camera sensitivity plays a crucial role prior to beginning the test. Exposure time is a factor contributing to camera sensitivity and it is the easiest setting to manipulate during the test since it introduces minimal errors when comparing to other factors, especially in quasi-static tests. This paper examines the influence of changing exposure time mid-test on DIC measurement uncertainty. The investigation was conducted by rigid body motion experiments at room temperature and 1600 °C, respectively. Thereby, some recommendations are given...

中文翻译：

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高温DIC测量中测试的暴露时间变化

由于辐射会使相机传感器饱和，因此在极端温度下执行数字图像关联（DIC）面临很大挑战。在如此高的温度下，从物体发出的光强度有时会非常强大，以至于采集到的图像绝大多数都饱和。这会导致数据丢失，从而可能破坏测试，从而要求用户重新启动测试。因此，在开始测试之前，选择合适的相机感光度至关重要。曝光时间是影响相机灵敏度的一个因素，并且是测试期间最容易操作的设置，因为与其他因素相比（尤其是在准静态测试中），它引入的误差最小。本文研究了改变中间测试时间对DIC测量不确定度的影响。该研究分别通过在室温和1600°C下的刚体运动实验进行。因此，给出了一些建议...