start

R2026b

Start streaming point clouds from Velodyne LiDAR sensor

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Syntax

start(lidarobj)

Description

Add-On Required: This feature requires the Point Cloud Toolbox Support Package for Velodyne LiDAR Sensors add-on.

start(lidarobj) starts streaming point clouds from the Velodyne LiDAR® sensor specified by lidarobj. The function deletes all existing point clouds in the buffer before accumulating new point clouds.

example

Examples

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After creating a velodynelidar object, you can start streaming point cloud data from your sensor and add this data to the object buffer. You do not have to start streaming to use the preview or read functions.

Create a velodynelidar object for an HDL-32E sensor. 

v = velodynelidar("HDL32E")
v = 

  velodynelidar with properties:

                      Model: 'HDL32E'
                  IPAddress: '127.0.0.1'
                       Port: 2368
    NumPointCloudsAvailable: 0
                    Timeout: 10
                  Streaming: 0
            CalibrationFile: 'C:\Program Files\MATLAB\R2019a\toolbox\shared\pointclouds\utilities\velodyneFileReaderConfiguration\HDL32E.xml'

The Streaming property is 0, indicating that the sensor is not yet streaming data to the object buffer.

Start streaming point clouds. Once the start function is called, streaming continues in the background. You can view the Streaming property. The value should be 1, indicating that the sensor has started streaming.

start(v)
v.Streaming
ans =

  logical

   1

View the number of point clouds currently in the buffer. This value increases while point clouds are streaming.

v.NumPointCloudsAvailable
ans =

    17

Stop streaming when you are finished.

stop(v)

The point clouds that are in the buffer when stop is called remain available. They are not deleted until start is called again. Use read to access the available point cloud data.

Input Arguments

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Velodyne LiDAR sensor connection, specified as a velodynelidar object.

Version History

Introduced in R2020b

See Also

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