Argus Library, set the camera exposure time in manually

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Hello,
I am having a question about how to set the camera exposure time manually by using argus library.
Here are the functions I found that can do this job:

ISourceSettings::setExposureTimeRange
IAutoControlSettings::setAeAntibandingMode
IAutoControlSettings::getAeAntibandingMode
IAutoControlSettings::setAeLock
IAutoControlSettings::getAeLock
IAutoControlSettings::setAeRegions
IAutoControlSettings::getAeRegions

Question 1: If I use ISourceSettings::setExposureTimeRange to set the camera exposure time to say 1ms to 10ms. Does that mean that the ISP will automatically determine the exposure time within 1ms to 10ms range?

Question 2: If I use ISourceSettings::setExposureTimeRange to set the camera exposure time to 1ms exact.

  • What ISP AE will do? I am kinda expect that the AE will do nothing and just keep the exposure time to 1ms.
  • Do I need to call IAutoControlSettings::setAeLock to lock the exposure time under the same request?
  • Will the antibanding still work under this case?

Thanks,

Jon

3

hello jon7,

you’ll need to configure the exposure time within the sensor capability range, that’s the values reported by sensor device tree. please refer to Property-Value Pairs and check min_exp_time / max_exp_time.
assume AE is free running, if you limit the exposure time range, AE will configure the values within the specify range.
on the other hand, if you’ve enable ae_lock to disable AE. the validate setting value will apply directly.
besides,
there’s argus_camera sample application, which provide the user-interface to control the exposure-time.
thanks

4

Hi @JerryChang
Thank you for your information.

6

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