Auto-Exposure Issue with Tracking Camera
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Hello, I am experiencing an auto-exposure issue with the tracking camera. The camera constantly flashes between bright and dim frames when it is exposed to sunlight. I recently flashed the drone with the VOXL 3.6.0 system image, but the problem still persists. Additionally, I tried sending the drone a manual gain and exposure, but the flashing continued after voxl-streamer was restarted.
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Hi Michael,
We're aware of the flickering issue and have fixed it on our dev branch which we're planning to do a full release of in the coming weeks.
As for the failure to set manual exposure/gain, how are you sending these instructions?
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Hi Alex,
We were using:
voxl-send-command tracking set_exp_gain <exposure> <gain>However, it seems that we were not setting the auto exposure mode to "off" before sending the commands.
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Hi Michael,
We're aware of the flickering issue and have fixed it on our dev branch which we're planning to do a full release of in the coming weeks.
As for the failure to set manual exposure/gain, how are you sending these instructions?
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Hi! It has been almost a year since the last response in this thread. I assume the change made it to the full release. I just flashed a board with SDK 1.0.0 and I see the problem when flying outdoors. Can you confirm this fix got pushed? DM and I can share a link to a video.
Cheers!
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The AE defaults are configured for OV7251. If you are using a different sensor, you'll need to tweak the PI values yourself to achieve your desired setup
Details here:
https://docs.modalai.com/voxl-camera-server/#camera-server-config-fileIf there is flicker, you could probably start by turning down the P gain. Here are the relevant parameters
ae_k_p_ns: the desired p_ns for the exposure algorithm
ae_k_i_ns: the desired k_i for the exposure algorithm
ae_max_i: the desired max_i for the exposure algorithm -
The AE defaults are configured for OV7251. If you are using a different sensor, you'll need to tweak the PI values yourself to achieve your desired setup
Details here:
https://docs.modalai.com/voxl-camera-server/#camera-server-config-fileIf there is flicker, you could probably start by turning down the P gain. Here are the relevant parameters
ae_k_p_ns: the desired p_ns for the exposure algorithm
ae_k_i_ns: the desired k_i for the exposure algorithm
ae_max_i: the desired max_i for the exposure algorithm@Moderator , I am using the standard OV7251 sensor. The Flicker does not happen indoors though. Happy to share a video.
Regards,
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