D435i sunlight

• MartyG

  • January 21, 2022 22:45

  Hi H Bagheri 71  RealSense 400 Series stereo depth cameras can be used both indoors and outdoors and work excellently in outdoor sunlight.  If you anticipate sensing at close range (such as analyzing steps) then a D435 or D435i model would be suitable, as they have a minimum depth sensing distance of only 0.1 meters / 10 cm and so can be positioned at that distance from objects and surfaces.

  If you do not require a camera model with an IMU component to track the camera's angle and movement speed then an IMU-less RealSense D435 would be able to meet your needs.

  https://store.intelrealsense.com/buy-intel-realsense-depth-camera-d435.html

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• H Bagheri 71

  • February 14, 2022 20:25

  Hi MartyG,

  Thanks for your reply.

  Is this camera is based on passive stereo vision? I've read a lot of issues with some cameras which use IR under sunlight.

  Just wanted to be sure to select the proper camera for my application.

  Thanks

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• MartyX Grover

  • February 14, 2022 21:30

  RealSense 400 Series active stereo depth cameras work excellently in sunlight, though should ideally not be faced directly towards the sun.  The cameras can make real-time automatic adjustments depending on conditions in the environment and can perform depth analysis using either ambient light sources or a semi-random projection of infrared dots onto the observed scene on camera models equipped with an internal projector.

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• MartyX Grover

  • February 14, 2022 21:31
  • Edited

  If your application requires the camera to be faced directly towards the sun then a physical thin-film filter called a linear polarizer filter can be purchased separately and overlaid on the camera lenses on the outside of the camera.  Any thin-film linear polarizer should work (circular filters from 3D glasses will not).  Search stores such as Amazon for the term linear polarization filter sheet

  Section 4.4 When to use polarizers and waveplates of Intel's paper about optical filters has more information about linear polarizer filters.

  https://dev.intelrealsense.com/docs/optical-filters-for-intel-realsense-depth-cameras-d400#section-4-the-use-of-optical-filters

  The link below has information about using the cameras in strong sunlight.

  https://dev.intelrealsense.com/docs/tuning-depth-cameras-for-best-performance#section-use-sunlight-but-avoid-glare

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