Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Question about Carla Settings for simulate a specific lidar #7

Open
DavideCoppola97 opened this issue Aug 25, 2021 · 0 comments
Open

Comments

@DavideCoppola97
Copy link

Hi, in the paper you simulate a VLP16 lidar using the Carla simulator and I have a question about that.
I tried to simulate a Velodyne HDL64E with Carla and I got the related pointclouds, aesthetically they look similar to those obtained with real lidar (like those of SemanticKitty dataset) but when I go to make inference on these pointclouds with some of the networks for semantic segmentation most famous (SqueezeSSegV3, SalsaNext, 3DminiNet etc) I get almost completely wrong labels, the networks cannot correctly recognize even the road. I doubted that I am doing something wrong in simulating the lidar in Carla, although I have entered, I believe, the same parameters of the lidar in question:
Here are the parameters I use to create my pointclouds with Carla (executed asynchronously with parameter -fps = 10):
lidar.set_position (0, 0.0, 1.73) # 1.73 meters should be the height from the ground of the lidar used in SemanticKitty, however I have the same results even with height = 0
lidar.set_rotation (0, 0, 0)
lidar.set (
Channels = 64,
Range = 120,
PointsPerSecond = 1250000,
RotationFrequency = 10,
UpperFovLimit = 2, #tested also with 3
LowerFovLimit = -24.9) #tested high with -25

So I would like to know how you have simulated your lidar, maybe there is some parameter that escapes me, I also leave attached the datasheet from where I got the parameters. What I think may be wrong is the range or ratio between the server's fps and the RotationFrequency parameter.
datasheet

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant