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Author Topic: Extracting camera trigger times  (Read 842 times)

z-air

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Extracting camera trigger times
« on: August 25, 2020, 06:31:28 PM »
Hi, is there any way to batch export the image capture times into a .csv file? 

Reason, need to get the trigger event times to further improve a dataset with higher precision gps data.

JMR

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Re: Extracting camera trigger times
« Reply #1 on: August 25, 2020, 10:16:20 PM »
If time stamps have been written to photo exif by some on-purpose hardware solution (like in a Phantom 4RTK) then you can get up to millisecond time resolution and likely you can batch export them with exiftool. But if you just pretend to use the standard time stamp of your camera for precisely calculate camera location... I'm afraid you are not in the right way. Time tag is written with one second resolution in most cameras. If the camera is moving at 5m/s (quite a normal speed for a drone), your interpolation in camera path will lead to higher uncertainty than your gps.
Most systems created for getting high precision geotags, write time-stamps of shot events into a log file, not in the photo metadata. I guess this is the file you need.
Regards