Systems and methods for false alarm reduction during event detection

A method for determining whether a product has been successfully purchased at a check-out register, the method comprising the steps of:

• a computer identifying in a video record a suspected fakescan involving an instant product, the computer identifying the suspected fakescan based on a first movement of the instant product adjacent to a scanner and an approximate time at which the instant product was moved adjacent to the scanner, wherein the instant product can be any one product included in an overall transaction involving a plurality of products;
• the computer determining that the scanner did not record a purchase transaction within a predetermined time of the time at which the instant product was moved adjacent to the scanner as identified in the video record;
• the computer measuring a difference in time between the time of the first movement of the instant product adjacent to the scanner and a time representing a boundary of the overall transaction, wherein a transaction record includes a timestamp corresponding to the boundary of the overall transaction;
• the computer generating a first score representing, at least in part, the difference in time;
• the computer representing the first score in a multi-dimensional vector space including a model representing sets of scores corresponding to actual fakescans and sets of scores corresponding actual true scans within the multidimensional vector space;
• and
• the computer comparing the first score to the model, and in response, the computer making a binary determination whether the suspected fakescan corresponds to an actual fakescan based on the comparison of the first score to the model.