D405 Color Instability on USB 2.0 and Outdoor lighting

Luke Bowersox

January 03, 2023 21:42

Continuing my investigations into D405 color instability. I have found two major issues.

Over saturation in outdoor lighting is orders of magnitude worse over USB2.0. This is seen as sepia or purple tones being seen across the image.
In certain conditions where portions of the image is overexposed (snow) and some under (asphalt). The color stream will flicker uncontrollably (I have this on video and its very reproducible across multiple different cameras)

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Luke Bowersox

January 03, 2023 21:47
I understand these are two different issues, but it seems like USB2.0 is the common factor. Is there a reason that the camera performs so much worse over 2.0? Is something being set differently in terms of auto-wb and auto-exposure for usb2.0 devies?
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MartyG

January 04, 2023 07:51
Hi Luke Bowersox This issue sounds similar to a past case with a different camera model at the link below, where an Intel RealSense team member provides advice about it.

https://github.com/IntelRealSense/librealsense/issues/5905
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Luke Bowersox

January 04, 2023 16:55
Hey Marty, I had the feeling we were going to have to move in the direction of neutral density filters. Thanks for the heads up.
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