A note on "block wavelet transforms for image coding"

We note that the arrangement of the rows or the block wavelet transform (BWT) matrix as given by Cetin, Gerek and Ulukus (see ibid. vol.3, no.6, p.433, 1993) is not in an increasing order of frequency as implied by the equations and figures in the same paper. The rows of the matrix are rearranged to follow an increasing order of frequency.