www.gusucode.com > 可控金字塔（steerable pyramids）的代码程序 > matlabPyrTools/pyrBand.m

    % RES = pyrBand(PYR, INDICES, BAND_NUM)
%
% Access a subband from a pyramid (gaussian, laplacian, QMF/wavelet, 
% or steerable).  Subbands are numbered consecutively, from finest
% (highest spatial frequency) to coarsest (lowest spatial frequency).

% Eero Simoncelli, 6/96.

function res =  pyrBand(pyr, pind, band)

res = reshape( pyr(pyrBandIndices(pind,band)), pind(band,1), pind(band,2) );