1. A method for detecting improvised explosive devices, partially or totally concealed on a path or in a vicinity thereof, using a vehicle following said path during a detection mission, said method comprising: continuously delivering current images representative of said path being followed to an image processing device; using the image processing device to replace at least some of said current images by removing and substituting the removed at least some current images with a number of substituted stored images, said substituted stored images being pre-recorded earlier images taken earlier in time of said path and stored in a database; using the image processing device to form an ordered combination of said current image less said removed at least some current images and said number of substituted stored images displaying the ordered combination of said current images less said removed at least some current images and said number of substituted stored images to enable, through correlation of the current images less said removed at least some current images and the number of substituted stored images, detection of said explosive devices; and updating said pre-recorded earlier images with said current images continuously delivered to said image processing device.