1. A method, comprising: irradiating a person at least partially covered with clothing; detecting electromagnetic radiation within a frequency range of about 200 MHz to about 1 THz reflected from a surface beneath the clothing in response to said irradiating; establishing data representative of an image of the person from the electromagnetic radiation; determining a number of data sets from the data, the data sets each corresponding to a spatial frequency representation of a different portion of the image; and adaptively processing each of the data sets to identify a man-made object being carried by the person beneath the clothing.