resize

 result = resize(orig, newSize, align, padding)

 if newSize is larger than orig size, pad with padding;
 if newSize is smaller than orig size, truncate to fit. 
 align specifies alignment. 0=centered
                           -1=left (up) aligned
                            1=right (down) aligned
 For example, align=[0 -1] centers on rows (y) and left align on columns (x).
              align=1 aligns left on columns and top on rows.
 align defaults to 0, and padding defaults to 0.

 Xuemei Zhang
 Last Modified 8/21/96