Nvidia patents method to fix height errors in LiDAR sensor data
This patent describes a way to correct small height errors in LiDAR data, which is a laser sensor used to map surroundings. The system uses pre-calculated tables to adjust measurements based on how far away an object is or how bright it appears, ensuring the sensor's data is more accurate.
In the filing’s own words
Embodiments of the present disclosure relate to correction of LiDAR measurement bias. In some embodiments, a LiDAR measurement bias such as a range-dependent height offset and/or a reflectivity-dependent height offset may be estimated in an offline process, the estimated biases may be stored in any suitable way (e.g., in one or more look up tables, indexed by range and/or reflectivity), and LiDAR points measured during an online process may be compensated by looking up and subtracting a range-dependent height bias corresponding to the measured range, and/or by looking up and subtracting a reflectivity-dependent height bias corresponding to the measured reflectivity.
What exactly they claim (claim 1)
1. One or more processors comprising processing circuitry to: generate one or more LiDAR detections using one or more LiDAR sensors of an ego-machine; look up one or more estimated height offsets corresponding to at least one of one or more measured range values or one or more measured reflectivity values of the one or more LiDAR detections; generate one or more bias-corrected LiDAR detections based at least on removing the one or more estimated height offsets from one or more measured height values of the one or more LiDAR detections; and control one or more operations of the ego-machine based at least on the one or more bias-corrected LiDAR detections.
Facts
- Company
- Nvidia (NVIDIA CORPORATION)
- Official title
- Surface estimation
- Patent number
- US12768969B2
- Application number
- 18987206
- Filed
- Dec 19, 2024
- Granted
- Oct 20, 2026
- Inventors
- 4
- Claims
- 20
Classified under
G01S 7/497 Physics & computingMore from Nvidia in Cars & transport
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.