METHOD FOR APPLYING CONTEXTUAL PRIVACY FILTERS TO MOVING OBJECTS TRACKED WITHIN A SPACE

1 . A method for tracking objects moving within a space comprising:

at a computer system:

transmitting a set of synchronization intervals to a set of sensor blocks arranged in the space;

at a first sensor block, in the set of sensor blocks, at a first time:

accessing a first frame captured by a first camera arranged in the first sensor block and located within the space;

detecting a first object in the first frame;

extracting a first location and a first set of features of the first object from the first frame;

transforming the first set of features into a first set of hash values according to an object hash function;

storing the first set of hash values and the first location in a first object container; and

transmitting the first object container labeled with the first time to the computer system;

at the computer system:

receiving a first set of object containers from each sensor block in the set of sensor blocks; and

distributing the first set of object containers to the set of sensor blocks;

at a second sensor block, in the set of sensor blocks, at a second time:

accessing a second frame captured by a second camera arranged in the second sensor block:

in response to detecting motion in the field of view of the second camera arranged in the second sensor block; and

in response to a first synchronization interval, in the set of synchronization intervals, intersecting the second time;

detecting a second object in the second frame;

extracting a second location and a second set of features of the second object from the second frame;

transforming the second set of features into a second set of hash values according to the object hash function;

querying the first set of object containers for the second set of hash values; and

in response to a second object container, in the first set of object containers, containing a threshold quantity of hash values in the second set of hash values:

identifying the second object as the first object previously detected by the first sensor block, in the set of sensor blocks, and represented by the first object container; and

in response to expiration of the first synchronization interval:

writing the second set of hash values to update the first object container; and

transmitting the first object container and the second location of the first object labeled with the second time to the computer system; and

generating an anonymized trajectory of the first object based on the first object container.