80 lines
2.3 KiB
Markdown
80 lines
2.3 KiB
Markdown
# pcd2pgm
|
||
|
||
基于 ROS2 和 PCL 库,用于将 `.pcd` 点云文件转换为用于 Navigation 的 `pgm` 栅格地图
|
||
|
||
|pcd|pgm|
|
||
|:-:|:-:|
|
||
|||
|
||
|
||
## 1. Overview
|
||
|
||
- 读取指定的 `.pcd` 文件
|
||
|
||
- 使用 Pass Through 滤波器过滤点云
|
||
|
||
- 使用 Radius Outlier 滤波器进一步处理点云
|
||
|
||
- 将处理后的点云转换为占据栅格地图(Occupancy Grid Map)
|
||
|
||
- 将转换后的地图发布到指定 ROS 话题上
|
||
|
||
## 2. Quick Start
|
||
|
||
### 2.1 Setup Environment
|
||
|
||
- Ubuntu 22.04
|
||
- ROS: [Humble](https://docs.ros.org/en/humble/Installation/Ubuntu-Install-Debs.html)
|
||
|
||
### 2.2 Create Workspace
|
||
|
||
```bash
|
||
mkdir -p ~/ros_ws
|
||
cd ~/ros_ws
|
||
```
|
||
|
||
```bash
|
||
git clone https://github.com/LihanChen2004/pcd2pgm.git
|
||
```
|
||
|
||
### 2.3 Build
|
||
|
||
```bash
|
||
rosdep install -r --from-paths src --ignore-src --rosdistro $ROS_DISTRO -y
|
||
```
|
||
|
||
```bash
|
||
colcon build --symlink-install --cmake-args -DCMAKE_BUILD_TYPE=release
|
||
```
|
||
|
||
### 2.4 Running
|
||
|
||
启动 pcd2pgm 节点,可在 RViz 中预览滤波后点云和栅格地图:
|
||
|
||
```sh
|
||
ros2 launch pcd2pgm pcd2pgm_launch.py
|
||
```
|
||
|
||
保存栅格地图:
|
||
|
||
```sh
|
||
ros2 run nav2_map_server map_saver_cli -f <YOUR_MAP_NAME>
|
||
```
|
||
|
||
## 三. Node Parameters
|
||
|
||
可以通过修改 `pcd2pgm/pcd2pgm.yaml` 文件来配置节点的参数。
|
||
|
||
```yaml
|
||
pcd2pgm:
|
||
ros__parameters:
|
||
pcd_file: /home/lihanchen/NAVIGATION_WS/pcd2pgm/rmuc_2025.pcd # pcd 文件所在目录
|
||
odom_to_lidar_odom: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0] # [x, y, z, r, p, y] 里程计到激光雷达的坐标变换(用于变换点云)
|
||
flag_pass_through: false # 是否使用 Pass Through 滤波器
|
||
map_resolution: 0.05 # 地图分辨率
|
||
map_topic_name: map # 发布地图的 ROS 话题名
|
||
thre_radius: 0.1 # Radius Outlier 滤波器半径
|
||
thre_z_max: 2.0 # Z轴最大值(用于 Pass Through 滤波器)
|
||
thre_z_min: 0.1 # Z轴最小值(用于 Pass Through 滤波器)
|
||
thres_point_count: 10 # 最小点数阈值(用于 Radius Outlier 滤波器)
|
||
```
|