_{ji}\) are computed as:
 $${\mu_{ji}}= \sum _{x,y} \left ( \texttt{contour} (x,y) \cdot (x - \bar{x} )^j \cdot (y - \bar{y} )^i \right )$$
where \((\bar{x}, \bar{y})\) is the mass center:
 $$\bar{x} = \frac{m_{10}}{m_{00}} , \; \bar{y} = \frac{m_{01}}{m_{00}}$$</p>
<p>The normalized central moments \(\eta_{ji}\) are computed as:
 $$\eta_{ji}= \frac{\mu_{ji}}{m_{00}^{(i+j)/2+1}} .$$</p>
    </div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see