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PRBonn / semantic-kitti-api

SemanticKITTI API for visualizing dataset, processing data, and evaluating results.
http://semantic-kitti.org
MIT License
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Multiple semantic labels for one single instance #51

Closed alexa19lab closed 4 years ago

alexa19lab commented 4 years ago

When I check your instance labels, I notice that there are cases where 3D points in one single instance have multiple semantic labels. For example, for points in one frame and with the same instance label, some of these points are semantically labeled with "car" while others labeled with "person". Could someone please explain that?

jbehley commented 4 years ago

Instance id are only unique within a class. Therefore, its possible to have instance 1 for car and instance 1 for person in the same scan. If you take the full 32 bits you have a unique identifier for object instances.

alexa19lab commented 4 years ago

Thanks so much for the reply! It solves my problem!