Voxl 2 Hires camera settings

robertociuch

Hi,
I'm working with an IMX412 on voxl 2, is there a way to manually set camera parameters like exposure time and gain? in my application I use an onboard light and the drone will always fly indoor in the same conditions, so I prefer to work with fixed parameters instead of letting the auto exposure do its things

Thank you in advance

Alex Kushleyev

@robertociuch,

Currently, you cannot set a fixed exposure and gain from voxl-camera-server.conf file. However, after camera server starts, you can send the following command to set the fixed exposure and gain:

voxl-send-command <name-of-output-stream> set_exp_gain <exposure_ms_float> <gain_int>

for example

voxl-send-command tracking set_exp_gain 20.0 100

The name-of-output-stream should match the pipe/stream name that you are using. Since there can be multiple streams for the same camera, you can use any stream to set this param.

We will add the ability to set constant exposure / gain to camera server in the future release.

Alex

robertociuch

@Alex-Kushleyev

I tried
voxl-send-command hires_small_color set_exp_gain 5.0 200

i receive the message "Successfully sent command to /run/mpa/hires_small_color/control" but I don't see any difference, in the voxl portal it continues to say "exposure: 26.916ms, gain: 800"

Alex Kushleyev

@robertociuch , can you please check if voxl-camera-server prints any error messages when you do that?

Also, please make sure your auto exposure mode for that camera (ae_mode) is not set to “isp”, you can set it to “off”.

robertociuch

@Alex-Kushleyev

I set the "ae_mode" to "off" and it works!

thank you