| 摘要 |
A checkout surveillance system comprises a scanner which scans product bar codes as they pass a first boundary. A video camera is provided to enable recording of images of a surveillance area in which the product scanning occurs. A signal processor receives notifications of positive scan events when a bar code is successfully scanned. The processor also processes captured images to track their movement and identify a 'no-scan' event when a product passes a second boundary in the absence of a positive scan. Upon a no-scan event, the processor may activate an alarm to notify the occurrence of an unsuccessful scan. The processor may also comprise means to aid locating the product in an image by removing background detail, noise, shadows and skin/clothing features. |
