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how to parse TimeStamp using cameras ?

See original GitHub issue

i`m trying grabmultiplecameras.py from repo samples. Added to code: time_stamp=res.TimeStamp (as i saw res has it). See something like this:

cam #0  image #1 time #1887938185770
cam #1  image #1 time #5674457758239
cam #0  image #2 time #1887980750406
cam #1  image #2 time #5674500322875

How to parse such TimeStamp ? How to set up cameras to use right time ?

Issue Analytics

State:
Created 2 years ago
Comments:11

Top GitHub Comments

1reaction

thiesmoellercommented, Jan 15, 2022

The timestamp of the cameras are very precise ( ~50ppm ) , although not synchronized to other cameras in the same system on USB as explained.

What do want to reach with the two cameras? precise stereo capturing? In this case really recommend to use hardware trigger of the cameras

InstantCameraArray is capable of doing real time reception of data, as the underlying grab-engines all work in parallel. So you only get the images sequentially, but the original acquisition in the cameras could be in sync to microsecond precision.

1reaction

thiesmoellercommented, Jan 15, 2022

Which Interface?

USB: one tick is 1e-9s counts from start of device

GEV standard: one tick is 8e-9s on gigabit speed from start to of device or timeStampReset

GEV + IEEE1588: is 1e-9 in time of clock master. If you have a clock master that is e.g. gps synchronized, timestamps are precise UTC