query about blob analysis

Hi,
So i am trying to understand the blob analysis command which is used in my code foe vehicle detection... here us the command used:
vision.BlobAnalysis('BoundingBoxOutputPort', true, ... 'AreaOutputPort', true, 'CentroidOutputPort', true, ... 'MinimumBlobArea', 400);
i am unable to understand what this true, or false refers to because interchanging these gives errors. Can anyone explain what theses refer to?

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le 20 Août 2021

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