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- % RES = pyrBandIndices(INDICES, BAND_NUM)
- %
- % Return indices for accessing a subband from a pyramid
- % (gaussian, laplacian, QMF/wavelet, steerable).
- % Eero Simoncelli, 6/96.
- function indices = pyrBandIndices(pind,band)
- if ((band > size(pind,1)) | (band < 1))
- error(sprintf('BAND_NUM must be between 1 and number of pyramid bands (%d).', ...
- size(pind,1)));
- end
- if (size(pind,2) ~= 2)
- error('INDICES must be an Nx2 matrix indicating the size of the pyramid subbands');
- end
- ind = 1;
- for l=1:band-1
- ind = ind + prod(pind(l,:));
- end
- indices = ind:ind+prod(pind(band,:))-1;
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