1. A method comprising: detecting, on a point-of-sale (POS) terminal, an event occurrence associated with an item having known characteristics; receiving an image from each of at least one camera of a plurality of cameras in response to the event occurrence; processing at least one of the received images to obtain item characteristics; determining according to at least one validation process whether the item characteristics are associated with the known characteristics of the item; providing a result of the at least one validation process to the POS terminal; and wherein at least one validation process is performed with regard to the at least one received image to remove a background of the image leaving only an image of a captured item and to perform at least one additional validation process that outputs the result, the result including an indication of whether the captured item is a naturally occurring or man-made item, the at least one additional validation process on the image of the captured item including at least one of: a silhouette detection process that processes the image of the captured item to leave a silhouette of the captured item which is then compared to a reference model of a man-made item and when relatively matched, outputting the indication the captured item is likely man-made; a glare detection process that evaluates areas within the image of the captured item for distinct occurrences of glare and when a number of glare occurrences larger than a first threshold is greater than a second threshold, outputting the indication the captured item is likely man-made; and performing a Hough transform on the image of the captured item and performing at least one of a straight-line detection process and a parallel line detection process, wherein: when the straight line detection identifies a number of straight lines longer than a third threshold greater than a fourth threshold, outputting the indication the captured item is likely man-made; when the parallel line detection identifies at least two parallel lines each having at least a minimum length and separated by at least a minimum distance, outputting the indication the captured item is likely man-made.