----- Original Message ----- From: "Roger Eichhorn" : Indeed it does explain everything. I suppose they're using an FFT on : the digitized data. I wish I knew how to do it! .. then we could pop a microlens array between the lens and the *film* in a film camera, scan the resulting image and perform the same trick with film media ? that'd be nice! http://en.wikipedia.org/wiki/Fast_Fourier_transform fft info - I like this explanation: "By far the most common FFT is the Cooley-Tukey algorithm. This is a divide and conquer algorithm that recursively breaks down a DFT of any composite size n = n1n2 into many smaller DFTs of sizes n1 and n2, along with O(n) multiplications by complex roots of unity traditionally called twiddle factors" k
