US Patent 8438084 Method and system for inventory verification

Verification of an inventory of stored products may be achieved by obtaining an image of the stored products and using text, optical character, and other feature recognition techniques to determine product identification and storage location. A comparison between earlier and current images of the same storage location is used to identify which locations have changed, i.e., from which locations have products been moved, removed, or added. The earlier and current images of the changed locations may be displayed to a user to visually inspect the differences between the images and verify the changes in inventory represented by those differences.