Question about Timestamp Conversion between App Logs and Real-World Time #35
Description
Hello, thank you for your excellent work! I am currently using your application to record data from my phone's camera and IMU. Subsequently, I employ VINS-Mono method to generate a trajectory of the phone's movement (denoted as trajectory A). This is compared against a user trajectory captured and generated by a CCTV camera (denoted as trajectory B) to verify the accuracy of the tracking algorithm I am researching.
My issue arises because the timestamps for each frame of trajectory B are in real-world time (e.g., one frame corresponds to 2024/4/9/9:30), whereas the timestamps recorded by your application (e.g., one frame at 328,551,511,918,592 nanoseconds) do not correspond to real-world time. And timestamps recorded in gyro_accel.csv and fram_timestamps.txt is different,which should I choose?This discrepancy prevents me from synchronizing trajectories A and B, making it challenging to cross-validate the two trajectories.
Could you please explain how the timestamps recorded by the application (for trajectory A) are calculated? And how do they correlate with real-world time?Thanks in advance.