Abstract: Described is a multiple-camera system and process for re-identifying a user located in a materials handling facility based on user patterns and/or descriptors representative of the user. In one implementation, a user pattern and/or a plurality of descriptors representative of a user are maintained as a position of a user is tracked through a materials handling facility. If the tracking of the user is lost, the last known position is stored with the user pattern and/or descriptors. If a new object is detected and confirmed to be a user, a user pattern and/or descriptors of the new object are compared with the stored user pattern and/or descriptors to determine if the new object is the user.

Abstract: A facility may allow an authorized user to sponsor other users to enter. Actions taken by those users may be associated with the account of the authorized user. Sensor data obtained at a portal may be indicative of whether a user attempted to provide credentials to a sensor at the portal, time between entry of users, attributes about the user, and so forth. Information about when the users have exited may also be obtained. For example, if three people entered one after another and then left at the same time, they may be deemed to form a group. Based on this information, the actions taken by the users in the group may be associated with the account of the authorized user.

Abstract: Described is a multiple-camera system and process for re-identifying a user located in a materials handling facility based on user patterns and/or descriptors representative of the user. In one implementation, a user pattern and/or a plurality of descriptors representative of a user are maintained as a position of a user is tracked through a materials handling facility. If the tracking of the user is lost, the last known position is stored with the user pattern and/or descriptors. If a new object is detected and confirmed to be a user, a user pattern and/or descriptors of the new object are compared with the stored user pattern and/or descriptors to determine if the new object is the user.

Abstract: A facility may allow an authorized user to sponsor other users to enter. Actions taken by those users may be associated with the account of the authorized user. Sensor data obtained at a portal may be indicative of whether a user attempted to provide credentials to a sensor at the portal, time between entry of users, attributes about the user, and so forth. Information about when the users have exited may also be obtained. For example, if three people entered one after another and then left at the same time, they may be deemed to form a group. Based on this information, the actions taken by the users in the group may be associated with the account of the authorized user.