Calibration of Video Cameras Frame Rate based on Onsets Tracking Technique
C. F. Au Yeung, S. L. Yang, Kaiyin Chen, H.F. Tsang · 2023
SummaryThis paper presents a calibration method developed at the Standards and Calibration Laboratory (SCL) for calibration of the frame rate of a video camera. The measurement setup includes a signal generator, a flashing light source and an in-house developed intensity analysis program. The calibration principle is based on analysing the intensity variation of a flashing light source recorded by a video camera under test. The onsets tracking technique is applied to track the glowing onsets instance of the flashing light source at particular frames, which offers traceable reference for frame rate setting of a video camera. Frame rates of a high speed camera calibrated by the proposed method are presented and discussed in this paper.