1. A method of identifying colon polyps in a digital volume, wherein said volume comprises a plurality of values corresponding to a domain of points in a 3D space, said method comprising the steps of: selecting a mother wavelet scaling function that corresponds to a polyp; performing a forward wavelet transformation on said volume to obtain a set of wavelet coefficients, wherein each wavelet coefficient is associated with a length scale; determining, for each length scale, a transformation magnitude; and forming, for each length scale, a transformed set of wavelet coefficients associated with said length scale.