View an uploaded scene
Once a scene has been created, and we have processed it, it is possible to view it in the annotation tool (without annotation capabilities).
Find the view link
Every scene has a view link that allows it to be viewed in the annotation tool, without any annotation capabilities. You can find the scene again either in the Kognic Platform or via the Python client:
Use the get_scenes_by_uuids method to get the scene object, and then access its view_link attribute, which is populated once the scene is ready.
scene = client.scene.get_scenes_by_uuids([scene_uuid])[0]
print(f"View the scene at {scene.view_link}")Check calibration of 3D scenes
3D scenes (those with LiDAR/RADAR) require a calibration, which can be checked for accuracy when viewing the scene. Start by opening the scene view link as described above.
In the 3D view you can compare where specific 3D points end up when projected into 2D.
- Click on the "3D" button at the top left of the scene view
- Find a well defined object in the pointcloud and hover the mouse cursor over a point on it.
- The cursor position is projected into the selected camera and shown as a dot on the camera thumbnail at the top right.
Calibrations are immutable
If you detect a calibration error this way, it is necessary to recreate a corrected calibration. It is therefore a good idea to check a few scenes before uploading a large dataset that all use the same calibration.