Patent ID: 7899232

Claim:
A method for testing luggage screening equipment operators, said method comprising: a. receiving a sequence of images of contents of luggage items derived from a device that scans the luggage items with penetrating radiation, the device being characterized by introducing a certain distortion into the images of contents of luggage items; b. causing a display device to display images derived from the sequence of images of contents of luggage items; c. occasionally causing the display device to show a simulated threat in a luggage item by displaying a combined image derived based at least in part on: i. an image in the sequence of images; and ii. a distorted threat image, the distorted threat image having been derived by applying a distortion insertion process to a reference threat image to introduce a distortion in the reference threat image, wherein the distortion insertion process tends to approximate the certain distortion introduced in the images of contents of luggage items by the device that scans the luggage items with penetrating radiation.