the structure represents the extremal region of the level set of intensity VlMserExtrReg::value and containing the pixel VlMserExtReg::index.</p>
<p>VlMserExtrReg::area is the area of the extremal region and VlMserExtrReg::area_top is the area of the extremal region containing this region in the level set of intensity VlMserExtrReg::area + <code>delta</code>.</p>
<p>VlMserExtrReg::variation is the relative area variation <code></code>(area_top-area)/area.</p>
<p>VlMserExtrReg::max_stable is a flag signaling