Reflectivity value of zero

joostm · Posted on 2021-11-2 18:47:23

Last edited by joostm In 2021-11-2 18:52 Editor

Hi,

I am testing a coating for reflectvity with the tele-15 product. Now I see that some points in the pointcloud have a reflectivity value of 0 . Does anyone have some more information about this used scale? What exactly does it mean that a point is zero or 150? Is a point of 150 better vissible for LiDAR systems, and therefore better recognizable for let's say > https://github.com/Livox-SDK/livox_detection_simu

Regards,

Joost

Livox Support · Posted on 2021-11-3 20:03:27

For some blind spots or noisy spots. Our upper algorithm will filter these out. These points will show up as zero points.

joostm · Posted on 2021-11-4 19:00:42

Last edited by joostm In 2021-11-4 19:39 Editor

ok, but when looking at this example of a car door:

I see the black car part at 0, but I do see a shape. How is this noise? as I see the door shape.

Livox Support · Posted on 2021-11-8 12:02:57

When detecting the color of an object, the black self-reflectivity itself is very low, and the material is specular reflection, the light received by the lidar will be very weak, and it is also related to the angle between the lidar and the measured object. When our lidar receives a severely distorted spot, it will filter these points.

joostm · Posted on 2021-11-29 20:03:09

Livox Support Posted at 2021-11-8 12:02
When detecting the color of an object, the black self-reflectivity itself is very low, and the mater ...

What do you mean with "filter these points"? They are still visible as "0" or what is the difference between "0" and filtered points? Can "0" be seen as "noise"?

Livox Support · Posted on 2022-1-2 10:21:12

Yes, "0" can be seen as "noise"?