Material of survey-grade high-reflectivity sphere targets when get reference the “pseudo” ground truth.

[liunao123]

Hello, thank your excellent work.

When I test this calibration tool. I want to get the reference the “pseudo” ground truth too. In your paper, I found out that you just described it this way：As a reference, we estimated the LiDAR-camera transformation using survey-grade high-reflectivity sphere targets, as shown in Fig.7。

So, I want to know Material of survey-grade high-reflectivity sphere targets, and can you tell me how can I make it. I will try to get reference the “pseudo” ground truth by it.
Thanks!

[koide3]

We used this reflectance spheres: https://shop.laserscanning-europe.com/Laser-Scanner-Reference-Sphere-Set-Basic_1

[liunao123]

@koide3 OK . I got it ， thank you very much.