Please select Into the mobile phone version | Continue to access the computer ver.

Tele-15 reflectivity score relative to min. distance?

[Copy Link]
Author: joostm | Time: 2021-11-29 20:08:12 | Autonomous driving|
10 1607

5

Threads

19

Posts

106

Credits

Pre-School

Rank: 2

Credits
106
Posted on 2021-11-29 20:08:12| All floors |Read mode
We have been testing the tele-15 and have another question.
We use a 3M retroreflective jacket as a reference object. This jacket reflects very brightly with a flashlight from a distance of 0 to a long way.
However, when you measure this jacket with the Tele-15 the retroreflectivity starts at about 150. The retroreflectivity starts to increase to 250 at about 17-20 meters. This is what we expect. Is this 17-20 meters a sort of minimum distance for the Tele-15 to work accurately?
Thank you.
Reply

Use props Report

5

Threads

19

Posts

106

Credits

Pre-School

Rank: 2

Credits
106
 Author| Posted on 2021-11-29 20:16:25| All floors
25 meter


VS
15 meters
Reply

Use props Report

2

Threads

191

Posts

753

Credits

Administrator

Rank: 9Rank: 9Rank: 9

Credits
753
Posted on 2021-11-29 21:57:01| All floors

There will be some deviations when measuring reflectivity with long-distance lidar.
Tele-15 has a longer range, and its reflectivity is calibrated based on the 20m standard. Generall, the reflectivity measured at 20m is the most accurate.
Reply

Use props Report

5

Threads

19

Posts

106

Credits

Pre-School

Rank: 2

Credits
106
 Author| Posted on 2021-11-29 23:40:34| All floors
Livox Support Posted at 2021-11-29 21:57
There will be some deviations when measuring reflectivity with long-distance lidar.
Tele-15 has a ...

Thank you for the quick reply! clear answer. Is the 0-255 score livox specific or is this used in the industry in general?
Reply

Use props Report

2

Threads

191

Posts

753

Credits

Administrator

Rank: 9Rank: 9Rank: 9

Credits
753
Posted on 2021-11-30 10:58:07| All floors
joostm Posted at 2021-11-29 23:40
Thank you for the quick reply! clear answer. Is the 0-255 score livox specific or is this used in  ...

The reflectivity 0-255 is livox specific. 0 to 155 corresponds to the reflectivity within the range of 0 to 100% in the Lambertian reflection model. 151 to 255 corresponds to the reflectivity of target object with retroflection properties.
Reply

Use props Report

5

Threads

19

Posts

106

Credits

Pre-School

Rank: 2

Credits
106
 Author| Posted on 2021-11-30 18:31:49| All floors
Last edited by joostm In 2021-11-30 18:33 Editor
Livox Support Posted at 2021-11-30 10:58
The reflectivity 0-255 is livox specific. 0 to 155 corresponds to the reflectivity within the rang ...

Why is there an overlap between 151 and 155? What does this overlap signify?
How do you differentiate between the lambertian range (0-155) and the reflection property range (151-255)?
Reply

Use props Report

2

Threads

191

Posts

753

Credits

Administrator

Rank: 9Rank: 9Rank: 9

Credits
753
Posted on 2021-11-30 18:47:49| All floors
joostm Posted at 2021-11-30 18:31
Why is there an overlap between 151 and 155? What does this overlap signify?
How do you differenti ...

Oh, I'm sorry typed a wrong number.  0 to 150 corresponds the Lambertian. 151 to 255 corresponds to the reflectivity of target object with retroflection properties. And, Lambertian and the reflection properties are distinguished by optical analysis.

Reply

Use props Report

5

Threads

19

Posts

106

Credits

Pre-School

Rank: 2

Credits
106
 Author| Posted on 2021-11-30 20:45:27| All floors
Livox Support Posted at 2021-11-30 18:47
Oh, I'm sorry typed a wrong number. 155 to 255 corresponds to the reflectivity of target object wi ...

No problem. But on the https://www.livoxtech.com/tele-15/faq on the livoxtech website states >>

0-155 corresponds to reflectivity within the range of 0-100% in the Lambertian reflection model. 151-255 corresponds to the reflectivity of target objects with Retroflection properties.


So that should be 155-255?
Reply

Use props Report

2

Threads

191

Posts

753

Credits

Administrator

Rank: 9Rank: 9Rank: 9

Credits
753
Posted on 2021-12-1 15:49:15| All floors
0 to 150 corresponds the Lambertian, 151 to 255 corresponds to the reflectivity of target object with retroflection properties.
Reply

Use props Report

5

Threads

19

Posts

106

Credits

Pre-School

Rank: 2

Credits
106
 Author| Posted on 2021-12-2 23:03:59| All floors
just to double check, you mean your previous comment is false:

Livox Support Posted at 2021-11-30 18:47
Oh, I'm sorry typed a wrong number. 155 to 255 corresponds to the reflectivity of target object wi ...
Reply

Use props Report

You need to log in before you can reply Login | Register

Credit Rules

Quick Reply Back to top