On the efficiency of 'A new efficient algorithm to compute the two-dimensional discrete Fourier transform'

The commenter suggests that the efficiency claims made by I. Gertner in the above-titled paper (IEEE Trans. Acoust., Speech, Signal Processing, vol.36, no.7, p.1036-50, July 1988), based on a Radon transform for reducing the number of 1-D discrete Fourier transform (DFTs) to compute a 2-D DFT, are offset by a costly increase in the number of additions required to perform the Radon transform. Gertner replies that the algorithm has an efficiency claim based on its parallelization of the 2-D task into smaller independent tasks and on its reduction of the number of DFTs required to complete the calculation. >