Understanding signal processing of L515 about realsense-ros HOT 9 CLOSED

Hi @Daya-AWR1642 There is not a mathematical reference available to precisely describe the signal processing of the L515 camera model. However, the official User Guide PDF document for the L515 camera model - L515_User_Guide_v1.0.pdf - may be a helpful reference to better understand the L515's principles. It can be downloaded as a PDF from the link below.

https://support.intelrealsense.com/hc/en-us/articles/360051646094-Intel-RealSense-LiDAR-Camera-L515-User-Guide

from realsense-ros.

Yeah, I knew this. Can you please suggest any IEEE papers, please

from realsense-ros.

The most suitable IEEE paper referencing the L515 that I could find is this one:

https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=10122518

The fastest way to find all of the L515 sections of the paper is to do a find operation on the browser page for the search term 'l515'.

from realsense-ros.

Haa, I have gone through this already. Anyway, thank you for your response. I'll try my own.

from realsense-ros.

Hi,
I have a few doubts about L515

1. is this direct detection lidar or coherent detection lidar?
   (I guess is direct detection)
2. can I assume L515 getting processed like

from realsense-ros.

Detailed information about the operating principles of the L515 model (which is now retired from the RealSense product range) is not available and so it is unfortunately not possible to provide confident answers to the above questions.

However, the L515 data sheet document provides the following description:

"The MEMS is used to scan the IR laser beam over the entire field of view (FOV). The L515 vision ASIC will process the data from the reflected beam captured by the photodiode and will output a depth point representing the accurate distance of a specific point in the scene from the camera".

This description makes it sound like L515 is based on direct detection (measuring amplitude changes of the reflected light) rather than coherent (measuring changes in the phase of the reflected light). I do not have the technical information to confirm this for certain though.

from realsense-ros.

Hi @Daya-AWR1642 Do you require further assistance with this case, please? Thanks!

from realsense-ros.

No thank you, our team completed and submitted a research paper with L515.
And Special thank you for assisting each time.

from realsense-ros.

You are very welcome. I'm pleased that I could help. Thanks very much for the update!

from realsense-ros.