Evaluation device for re-identification and corresponding method, system and computer program

A system for re-identification comprising,

• a plurality of camera devices, and
• an evaluation device;
• each camera device of the plurality of camera devices comprising an imaging sensor and processing circuitry configured to:
• obtain media data via the imaging sensor;
• generate a re-identification code representing at least a portion of the media data;
• transform the re-identification code using a similarity-preserving transformation based on a transformation parameter to obtain a transformed re-identification code;
• associate the transformed re-identification code with a timestamp and location information;
• and
• provide the transformed re-identification code, the timestamp, and the location information to the evaluation device, and
• the evaluation device comprising processing circuitry being configured to:
• obtain a plurality of transformed re-identification codes from the plurality of camera devices,
• match transformed re-identification codes among the plurality of transformed re-identification codes using a similarity metric to generate one or more tuples of transformed re-identification codes that are similar according to the similarity metric;
• determine one or more sequences of locations associated with the transformed re-identification codes of the one or more tuples of transformed re-identification codes based on the timestamps and location information associated with the transformed re-identification codes of the respective tuple;
• and
• provide information on the one or more sequences of locations.