X
coordinate of the center of the first descriptor is at 1 + 3/2 * 3
= 5.5. For the second descriptor immediately to its right this is
5.5 + STEP, and so on.
</p><p>
See also: <a href="%pathto:vl_sift;">VL_SIFT</a>(), <a href="%pathto:vl_help;">VL_HELP</a>().
</p></div></group>
