Quality of monochrome infrared video feed from L515

• Aznie Syaarriehaah

  • November 25, 2020 06:53

  Hi S Coenders,
  
  The L515 LiDAR camera designed for indoor use. The performance will be degraded if the user points the camera towards the window during the day. In general, avoid brightly sunlit locations. Indoor residential/commercial lighting is perfectly fine, as is complete darkness. When there is too much interfering IR light in the environment, the intensity image will look washed out and the depth map will have many holes (unknown depth values).To achieve maximum range results from the L515 the following conditions are recommended. The target must have 95% reflectivity for IR light at 860nm and be in the center of the frame. Ambient sunlight will have a significant effect on range. (Although sunlight is the most common source of ambient IR light, any light source operating at 860nm such as halogen and some LED will also affect L515 performance.)

  Please check out the L515 documentation for more details regarding the technology and capability of the L515 Lidar camera, https://dev.intelrealsense.com/docs/lidar-camera-l515-datasheet and Intel® RealSense™ LiDAR Camera L515 User Guide.

  We have an Intel RealSense YouTube channel and you can find any videos that might answer your question.
  Here are two videos of the L515 camera that might be helpful to you.

  • https://youtu.be/Rx-75ZEAMeg
  • https://www.youtube.com/watch?v=2NJvDcqOows

  
  Regards,
  Aznie
  Intel Customer Support

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• S Coenders

  • December 07, 2020 15:04

  Dear Aznie,

  Thank you for your reply.

  What I was hoping for is a video of the monochrome IR stream (see left-most screenshot below as an example). According to the user documentation there are three data streams coming from the L515 (see table below). I'm interested in the Infrared Y8 stream. To get an impression of the quality of this stream compared to a regular monochrome camera, it would be ideal to have a video. Do you happen to have a video recorded with the L515? Or could you make one?

   

  

  

   

  Thank you very much in advance

  Kind regards,

  Sjors

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• S Coenders

  • January 05, 2021 10:00

  Dear Intel Support,

  I would really appreciate your help with the question above. Any chance of sharing a video of the Y8 stream?

  Thank you in advance

  Kind regards,

  Sjors

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• S Coenders

  • January 05, 2021 10:19

  Dear support,

  I realize some additional background information may be useful:

  Currently we are debating whether to choose for a time-of-flight depth camera or the L515. Next to depth information we need an IR monochrome video feed for our application. Time-of-flight cameras produce this video with their CMOS sensor. However, the L515 uses lidar to create such an image. Am I correct in assuming that the Y8 stream is in essence a video stream with a certain framerate? If so, I am very much interested in the quality, since the video is created with a different technique (lidar) than I am used to. Hence my request for a video.

  Thanks,

  Sjors

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• Aznie Syaarriehaah

  • January 07, 2021 08:45

  Hi Sjors,

  Sorry for the delay in replying to you. The maximum range of the L515 depends on laser power, receiver gain, object material, and ambient light. The camera can achieve its maximum possible range with a highly reflective object in a space with no ambient light. The RGB Sensor Resolution and frame rate of the L515 are 1920 x 1080 at 30 FPS in the indoor environment. Check out this documentation https://www.intelrealsense.com/optimizing-the-lidar-camera-l515-range/ for more information. I have sent the video to your registered email.

   

  Regards,

  Aznie

  Intel Customer Support

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• S Coenders

  • January 08, 2021 11:48

  Dear Aznie,

  Thank you for your reply. Unfortunately I have not received the video. Maybe it bounced because it is too large? Could you try to resend it, maybe via a service like wetransfer?

  Thank you in advance

  Kind regards,

  Sjors

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