In reconSpyr.m, line 94, the original code was:
res = upConv( subMtx(pyr, pind(1,:)), hi0filt, edges, [1 1], [1 1], size(res), res);
And it seems the result matrix will not be returned when res is passed to this function, just as mentioned in the 'help' instruction. After I changed this line to:
upConv( subMtx(pyr, pind(1,:)), hi0filt, edges, [1 1], [1 1], size(res), res);
The problem is solved.
A similar issue is seen in reconSpyrLevs.m, line 41.
In reconSpyr.m, line 94, the original code was:
res = upConv( subMtx(pyr, pind(1,:)), hi0filt, edges, [1 1], [1 1], size(res), res);
And it seems the result matrix will not be returned when res is passed to this function, just as mentioned in the 'help' instruction. After I changed this line to:
upConv( subMtx(pyr, pind(1,:)), hi0filt, edges, [1 1], [1 1], size(res), res);
The problem is solved.
A similar issue is seen in reconSpyrLevs.m, line 41.