Export Lidar Labels for training neural network

Good day,

Is it possible to export the Lidar labels or the labelled files from the Lidar Toolbox to open them with Python?

The goal is to use the labels in Python as training and test data to create a neural network that recognises people in 3D Lidar point clouds.

Is there a similar example?

Answer 1

[Smit]

Hi,

I understand you want to export Lidar labels generated in MATALB so you can use them in Python.

You may be able to export the label data using functions like “writetimetable”, and the label definitions in a JSON file using “jsonencode” function. An example of this could be

data = groundTruthLidar(dataSource,labelDefs,lidarData);

% Write label definitions in a JSON file
jsonText = jsonencode(data.LabelDefinitions);
writelines(jsonText, 'LabelDefinitions.json');

% Write label data in Excel file
writetimetable(data.LabelData, 'LabelData.xlsx');

You can then use appropriate Python libraries to import this data in your Python code.

You could also possibly use the Lidar Labeler app in MATLAB to export labels. You can open the app using the following command

lidarLabeler;

You can visit the documentation page for more information.

Hope this helps!