修正卷帘快门探测器对从视频记录中确定流星速度的影响
Correction of the influence of rolling shutter detectors on determining the velocity of meteors from video recordings
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中文总结 AI 辅助
本文针对用于流星观测的卷帘快门相机，提出了包含传感器滚动周期的流星速度修正流程，通过四种实验方法（最优为NEXTA法）确定未在规格中提供的滚动周期，以准确修正卷帘快门对流星速度测定的影响。
中文摘要 AI 辅助
现代视频相机使用全局快门或卷帘快门来生成单个视频帧：全局快门的整帧同时曝光和读出，卷帘快门则逐行依次曝光和读出，这类相机目前常用于流星观测。为了正确准确地确定所记录流星的速度，必须对这类图像读取进行修正，本文提供了正确的修正流程，该修正需包含传感器的滚动周期值，而该值通常未在相机规格中提供。我们讨论了四种实验确定滚动周期的方法，其中最准确的方法使用了文献[1]中的新型曝光时序分析仪（NEXTA），并列出了多款相机的实测滚动周期。
英文摘要
Modern video cameras use either global or rolling shutter to create individual video frames. In case of global shutter, the whole frames are exposed and read out at the same time. In case of rolling shutter, the exposure and readout proceed sequentially line by line. Such cameras are now commonly used for meteor observations. It is then necessary to perform a correction for this type of image reading in order to correctly and accurately determine the velocity of recorded meteors. We provide here the correct procedure. The correction must include the value of the rolling period of the sensor, which is generally not provided in camera specifications. We discuss four methods of determining the rolling period experimentally. The most accurate method uses the New EXposure Timing Analyser (NEXTA) of [1]. We list rolling periods measured for several cameras.
