通过将LIDAR和立体摄像头数据与互插的地面平面数据融合,提高越野地形估计
Gustav Sten1, Lei Feng1, Björn Möller1
1Engineering Design, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
Sensors (Basel, Switzerland)
|January 25, 2025
概括
这项研究引入了一种改进的地形估计方法,通过插入光检测和测距 (LIDAR) 数据来实现自主导航. 这种方法显著提高了在各种地形上的立体相机准确性.
科学领域:
- 机器人技术 机器人技术 机器人技术
- 计算机视觉 计算机视觉
- 地理空间分析的研究.
背景情况:
- 准确的地形估计对于自主越野导航至关重要.
- 目前使用立体摄像头的方法提供了密集的数据,但缺乏准确性,而光检测和测距 (LIDAR) 传感器提供了准确性,但覆盖范围有限.
- 由于直接集成的局限性,现有的传感器融合技术往往无法充分利用LIDAR数据的全部潜力.
研究的目的:
- 调查是否结合插入的LIDAR数据可以显著提高立体摄像机基于地形估计的准确性.
- 开发一种新的传感器融合方法,将LIDAR的精度优势扩展到直接扫描区域之外.
- 评估拟议方法在不同环境中的有效性.
主要方法:
- 通过插入LIDAR数据来构建一个参考地面平面,以匹配立体摄像头点云覆盖范围.
- 使用卡尔曼过器将互插的LIDAR地图与立体摄像头点云融合在一起,用于增强的地形绘图.
- 在受控的室内,半受控的室外和非结构化的地形环境中测试方法.
主要成果:
- 与现有方法相比,拟议的方法在受控环境中减少了40%的平均误差,在半受控环境中减少了67%的平均误差.
- 插入的LIDAR数据融合保持了类似于立体相机的广泛覆盖范围.
- 在非结构化地形中的评估证实了该方法对地形估计的重大纠正影响.
结论:
- 在传感器融合之前插入激光雷达数据,大大提高了基于立体摄像头的地形估计的准确性.
- 开发的方法有效地将LIDAR的精度优势扩展到更大区域,增强自主导航能力.
- 这种方法为更可靠的越野导航系统提供了一个实际的解决方案.
相关概念视频
01:25Methods of Obtaining Topography
44
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
44
01:29Plotting of Topographic Maps
35
Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
35
01:29Topographic Surveying and Contours
48
Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
48
01:30Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
20
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
20
01:26Profile Leveling and Cross Sections
108
Profile leveling and cross-sections are surveying methods used to determine and document terrain elevations for infrastructure projects such as highways, railroads, canals, and pipelines. These methods provide data for earthwork planning and alignment of proposed routes. Profile leveling involves measuring elevations along a fixed line to create a vertical terrain profile. A surveyor sets up a leveling instrument at the benchmark (BM) and records a backsight (BS) to determine the...
108
01:19Design Example: Maintaining Level of an Embankment
51
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
51