Notification system and methods for use in retail environments

1. In a retail environment having item carriages and customer operated handheld scanners in lieu of fixed point of sale (POS) scanning stations, a method of detecting unauthorized retail item movement, comprising:

receiving, by instructions that execute on a hardware processor of a device, video data depicting images of a customer in the retail environment placing a set of retail items into an item carrier apparatus;

receiving, by the instructions, a log of transaction data itemizing presence of at least a portion of the retail items handled by the customer and placed in the item carrier apparatus, the log based on scanning information from an item scanner device operable to scan each item in the portion of retail items as the item is placed into the item carrier apparatus;

detecting, by the instructions, a location of the item carrier apparatus based on analysis of received video data;

detecting, by the instructions, video events based on via video analysis of the received video data, the video events capturing placement and timing of the given retail item in the item carrier apparatus; and

comparing, by the instructions, the received log of transaction data and the video events;

detecting, by the instructions, absence of a transaction record in the log for the given retail item placed in the item carrier apparatus based on a failure to find presence of the transaction record in the log corresponding to a particular video event around the time when the given retail item was placed in the item carrier apparatus.

2. The method of claim 1 further comprising:

receiving item information indicating a location of different retail items available in the retail environment; and

evaluating the log of transaction data in view of the item information to determine if the video events are suspicious.

3. The method of claim 1 further comprising:

receiving, by the instructions, sensor data associated with placing of the set of retail items into the item carrier apparatus, the sensor data generated by sensor hardware other than an item scanner device used by the customer to produce the log of transaction data;

analyzing, by the instructions, the sensor data to detect sensor events; and in the computer system, based on a combined analysis of the video events and the sensor events, confirm that the activity is suspicious.

4. The method of claim 3 further comprising:

generating, by the instructions, a first output value for a detected video event;

generating, by the instructions, a second output value for a detected sensor event;

generating, by the instructions, an aggregated value based on a combination of the first output value and the second output value; and

based on comparison of the aggregated value to a threshold value, generating, by the instructions, an overall output value indicative of whether a customer action corresponding to the detected video event and the detected sensor event is suspicious.

5. The method of claim 4 further comprising:

generating, by the instructions, a first probability value indicating a degree to which a detected video event as captured by the video data is suspicious in view of monitoring a first attribute of a customer action in the shopping area;

generating, by the instructions, a second probability value indicating a degree to which a detected sensor event as captured by the sensor data is suspicious in view of monitoring a second attribute of the customer action in the shopping area;

combining, by the instructions, the first probability value and the second probability value under a probabilistic framework to produce an output value, the output value indicating a degree to which the customer action is suspicious.

6. The method of claim 1 further comprising:

in response to detecting the absence of the transaction record in the log for the given retail item placed in the item carrier apparatus, sending, by the instructions, an alert to a receiving device.