1. A method for projecting a superimposed image onto a target display surface under observation of at least one camera, the method comprising the steps of: (a) determining a projective relationship between each of a plurality of projectors and the target display surface; (b) estimating a component image for each said projector, comprising: (1) using said projective relationship, for each of said component images determine a plurality of sub-sampled, regionally shifted images represented in the frequency domain; and (2) composing each said component image using a respective plurality of said sub-sampled, regionally shifted images; and (c) minimizing the difference between a sum of said component images and a frequency domain representation of a target image to produce a second component image for each said projector.